/* 
   styles.css - Portafolio Profesional de José Rodríguez Melero
   Estilo: Dark Futuristic / Electronic Engineering Theme
*/

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-main: #000000;
    --bg-dots: rgba(212, 175, 55, 0.02);
    
    /* Colors */
    --accent-cyan: #d4af37;
    --accent-blue: #f3e5ab;
    --accent-purple: #aa771c;
    --accent-green: #39ff14;
    --accent-red: #ff3131;
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    
    /* Glassmorphism */
    --glass-bg: rgba(10, 10, 10, 0.88);
    --glass-border: rgba(212, 175, 55, 0.18);
    --glass-border-glow: rgba(212, 175, 55, 0.55);
    --glass-shadow: rgba(0, 0, 0, 0.85);
    
    /* Font Families */
    --font-outfit: 'Outfit', sans-serif;
    --font-code: 'Fira Code', monospace;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
html {
    background-color: #000000;
    font-size: 16px;
}

@media (min-width: 1024px) {
    html {
        font-size: 18px;
    }
}

@media (min-width: 1440px) {
    html {
        font-size: 20px;
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(var(--bg-dots) 1.5px, transparent 1.5px),
        radial-gradient(var(--bg-dots) 1.5px, transparent 1.5px);
    background-size: 30px 30px;
    background-position: 0 0, 15px 15px;
    color: var(--text-primary);
    font-family: var(--font-outfit);
    line-height: 1.6;
    overflow-x: hidden;
    
    /* Borde de oro alrededor de toda la página (Estilo Tarjeta de Visita) */
    border: 3.5px solid var(--accent-cyan);
    border-radius: 28px;
    margin: 16px;
    min-height: calc(100vh - 32px);
    box-shadow: 0 0 25px rgba(212, 175, 55, 0.15);
    position: relative;
}

@media (max-width: 768px) {
    body {
        border-width: 2.5px;
        border-radius: 16px;
        margin: 8px;
        min-height: calc(100vh - 16px);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: rgba(212, 175, 55, 0.3);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}

/* Justificación global de párrafos y textos de contenido */
p, 
.project-desc, 
.timeline-desc, 
.timeline-bullets li, 
.contact-info-desc, 
.hero-desc, 
.calc-education-block p, 
.calc-disclaimer {
    text-align: justify;
}

/* Layout Utilities */
.container {
    max-width: 75rem;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 11rem 0;
    position: relative;
}

/* Header & Navigation */
header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: #000000;
    border-bottom: 1px solid var(--glass-border);
    border-top-left-radius: 24px;
    border-top-right-radius: 24px;
    transition: var(--transition-smooth);
    padding: 12px 0;
}

header.scrolled {
    padding: 12px 0;
    background: #000000;
    border-bottom: 1px solid rgba(212, 175, 55, 0.3);
}

@media (max-width: 768px) {
    header {
        top: 0;
        width: 100%;
        border-top-left-radius: 12px;
        border-top-right-radius: 12px;
    }
    footer {
        border-bottom-left-radius: 12px;
        border-bottom-right-radius: 12px;
    }
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 85px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}


.nav-menu {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-cyan);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
    transition: var(--transition-smooth);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
}

/* Glassmorphism Card Style */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 32px;
    backdrop-filter: blur(16px) saturate(180%);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: var(--glass-border-glow);
    box-shadow: 0 8px 40px 0 rgba(212, 175, 55, 0.15);
    transform: translateY(-4px);
}

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    background-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85) 0%, var(--bg-main) 100%), url('assets/hero_bg_gold.png');
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 30%, rgba(212, 175, 55, 0.12), transparent 50%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.badge {
    background: rgba(212, 175, 55, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.25);
    color: var(--accent-cyan);
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-code);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.badge::before {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-cyan);
    animation: pulse 1.5s infinite;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-title span {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 50%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-circuit-line {
    width: 280px;
    height: 2px;
    background-color: var(--accent-cyan);
    position: relative;
    margin: 16px 0 24px 0;
}

.hero-circuit-line::after {
    content: '';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translateY(-50%);
    width: 10px;
    height: 10px;
    background-color: var(--bg-main);
    border: 2px solid var(--accent-cyan);
    border-radius: 50%;
}

.hero-subtitles {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 24px;
}

.hero-subtitles h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--accent-blue);
    letter-spacing: 0.5px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.4;
}

.hero-subtitles h3::before {
    content: '▪';
    color: var(--accent-cyan);
    font-size: 0.8rem;
    margin-top: 4px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 580px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

.btn-group {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: #000000;
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 4px 30px rgba(212, 175, 55, 0.45);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 1.2rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.social-btn:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    background: rgba(212, 175, 55, 0.05);
    transform: translateY(-2px);
}

/* Hero PCB graphic container */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.pcb-visualizer {
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.05) 0%, transparent 70%);
    border: 2px dashed rgba(212, 175, 55, 0.15);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: rotate 30s linear infinite;
    position: relative;
}

.pcb-chip {
    width: 90px;
    height: 90px;
    background: #0a0a0a;
    border: 2px solid var(--accent-cyan);
    border-radius: 12px;
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
    position: absolute;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: var(--font-code);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    animation: rotate-reverse 30s linear infinite;
    padding: 8px;
    text-align: center;
}

.pcb-chip span {
    font-size: 0.55rem;
    color: var(--text-muted);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    font-family: var(--font-code);
    color: var(--accent-cyan);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.15;
    margin-bottom: 16px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 48px;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 20px;
}

.about-content-right {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
}

.profile-image-container {
    width: 100%;
    max-width: 330px;
    border-radius: 16px;
    border: 1px solid var(--accent-cyan);
    background: radial-gradient(circle at center, rgba(212, 175, 55, 0.15) 0%, #030509 100%);
    padding: 6px;
    box-shadow: 0 4px 25px rgba(212, 175, 55, 0.12);
    filter: drop-shadow(0 0 15px rgba(212, 175, 55, 0.08));
    transition: var(--transition-smooth);
}

.profile-image-container:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 35px rgba(212, 175, 55, 0.25);
    filter: drop-shadow(0 0 20px rgba(212, 175, 55, 0.15));
}

.profile-img {
    width: 100%;
    height: 100%;
    aspect-ratio: 4/5;
    border-radius: 12px;
    display: block;
    object-fit: cover;
    object-position: center 20%;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
    width: 100%;
}

.stat-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    padding: 24px;
    border-radius: 16px;
    text-align: center;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-cyan);
    display: block;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(212, 175, 55, 0.06);
    border: 1px solid rgba(212, 175, 55, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.feature-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.project-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: 0.85rem;
    font-family: var(--font-code);
}

.project-category {
    color: var(--accent-cyan);
    text-transform: uppercase;
}

.project-date {
    color: var(--text-muted);
}

.project-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tech-tag {
    font-family: var(--font-code);
    font-size: 0.75rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--glass-border);
    padding: 4px 10px;
    border-radius: 6px;
    color: var(--text-secondary);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.project-link:hover {
    color: var(--accent-blue);
    gap: 12px;
}

/* CAN Bus Simulator Section */
.sim-grid {
    display: grid;
    grid-template-columns: 1.12fr 0.88fr;
    gap: 40px;
    align-items: stretch;
}

.sim-interface {
    background: #090e1b;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    box-shadow: inset 0 2px 20px rgba(0,0,0,0.8);
    position: relative;
    overflow: hidden;
}

.sim-interface::before {
    content: 'SIMULADOR';
    position: absolute;
    top: 12px;
    right: 12px;
    font-family: var(--font-code);
    font-size: 0.7rem;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.3);
    color: var(--accent-cyan);
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 1px;
}

.sim-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sim-title {
    font-family: var(--font-code);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sim-status {
    width: 8px;
    height: 8px;
    background-color: var(--accent-red);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 10px var(--accent-red);
}

.sim-status.active {
    background-color: var(--accent-green);
    box-shadow: 0 0 10px var(--accent-green);
    animation: blink 1s infinite;
}

/* CAN bus line graphic */
.bus-visual {
    height: 90px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
}

.bus-line {
    position: absolute;
    left: 20px;
    right: 20px;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(0, 242, 254, 0.4) 20%, rgba(0, 242, 254, 0.4) 80%, transparent);
    z-index: 1;
}

.bus-node {
    width: 60px;
    height: 52px;
    background: #111827;
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: var(--font-code);
    font-size: 0.65rem;
    color: var(--text-secondary);
    position: relative;
    z-index: 2;
    transition: var(--transition-smooth);
}

.bus-node.active {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.2);
}

.bus-node span {
    font-size: 0.5rem;
    color: var(--text-muted);
}

/* Floating CAN packets */
.can-packet {
    position: absolute;
    width: 6px;
    height: 6px;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-cyan);
    z-index: 3;
    opacity: 0;
    top: calc(50% - 3px);
}

/* Terminal output */
.sim-terminal {
    background: #03050a;
    border: 1px solid rgba(255,255,255,0.04);
    border-radius: 12px;
    padding: 16px;
    height: 150px;
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--accent-green);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.terminal-line {
    animation: fadeIn 0.2s ease-out;
}

/* Decoded data display */
.sim-telemetry {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.telemetry-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    padding: 16px;
    border-radius: 12px;
    text-align: center;
    position: relative;
}

.telemetry-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    display: block;
}

.telemetry-value {
    font-family: var(--font-code);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.telemetry-unit {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}

.telemetry-progress {
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    margin-top: 8px;
    overflow: hidden;
}

.telemetry-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
    transition: width 0.3s ease;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.skills-column h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 12px;
}

.skills-column h3 span {
    color: var(--accent-cyan);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skill-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.03);
    padding: 12px 18px;
    border-radius: 10px;
    transition: var(--transition-smooth);
}

.skill-item:hover {
    border-color: rgba(0, 242, 254, 0.15);
    background: rgba(0, 242, 254, 0.02);
}

.skill-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.skill-level {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    background: rgba(0, 242, 254, 0.05);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 48px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-card {
    display: flex;
    gap: 20px;
    align-items: center;
}

.contact-details h4 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-details p, .contact-details a {
    font-size: 1.1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.contact-details a:hover {
    color: var(--accent-cyan);
}

.copy-btn {
    background: none;
    border: none;
    color: var(--accent-cyan);
    cursor: pointer;
    font-size: 0.9rem;
    margin-left: 8px;
    font-family: var(--font-code);
    transition: var(--transition-smooth);
}

.copy-btn:hover {
    color: var(--accent-blue);
}

/* Copy notification toast */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: rgba(16, 185, 129, 0.9);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #ffffff;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 14px 18px;
    color: var(--text-primary);
    font-family: var(--font-outfit);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.1);
}

/* Fix para que las opciones del selector desplegable sean legibles en navegadores con tema claro por defecto */
select.form-input option {
    background-color: #0b0f19;
    color: #ffffff;
}

textarea.form-input {
    resize: none;
    min-height: 150px;
}

/* Footer */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 40px 0;
    background: #030509;
    text-align: center;
    border-bottom-left-radius: 24px;
    border-bottom-right-radius: 24px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center !important;
}

.footer-text span {
    color: inherit;
}

/* Animations */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(0, 242, 254, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes rotate-reverse {
    0% { transform: rotate(360deg); }
    100% { transform: rotate(0deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Timeline styling */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0 auto;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue), var(--accent-purple));
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -32px;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--bg-main);
    border: 3px solid var(--accent-cyan);
    box-shadow: 0 0 10px var(--accent-cyan);
    z-index: 2;
    transition: var(--transition-smooth);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
    border-color: var(--accent-purple);
    box-shadow: 0 0 12px var(--accent-purple);
}

.timeline-content {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    padding: 24px;
    border-radius: 16px;
    backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    border-color: rgba(0, 242, 254, 0.2);
    background: rgba(255, 255, 255, 0.04);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    gap: 16px;
}

.timeline-header > div {
    flex: 1;
    min-width: 0;
}

.timeline-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.timeline-company {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-cyan);
}

.timeline-date {
    font-family: var(--font-code);
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    padding: 2px 10px;
    border-radius: 6px;
    border: 1px solid var(--glass-border);
    flex-shrink: 0;
    align-self: flex-start;
}

.timeline-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.timeline-bullets {
    margin-top: 12px;
    padding-left: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding-left: 18px !important;
        padding-right: 24px !important;
    }
    
    section {
        padding: 150px 0;
    }
    
    #hero {
        min-height: auto !important;
        padding-top: 40px !important;
        padding-bottom: 30px !important;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.98);
        border-bottom: 1px solid var(--accent-cyan);
        padding: 24px;
        gap: 20px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        width: 100% !important;
    }
    
    .hero-content {
        align-items: stretch;
        text-align: left;
        width: 100% !important;
    }
    
    .hero-title {
        text-align: left !important;
    }
    
    .hero-circuit-line {
        margin: 16px 0 24px 0 !important;
    }
    
    .hero-subtitles {
        align-items: flex-start !important;
        text-align: left !important;
    }
    
    .hero-desc {
        text-align: justify !important;
    }
    
    .social-links {
        justify-content: flex-start !important;
        width: 100%;
    }
    
    .hero-visual {
        display: none !important;
    }
    
    .projects-grid, .sim-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-grid {
        display: flex;
        flex-direction: column-reverse;
        gap: 30px;
        align-items: center;
    }

    .about-content-left {
        width: 100%;
    }

    .about-content-right {
        width: 100%;
        margin-bottom: 10px;
        display: flex;
        justify-content: center;
    }

    .profile-image-container {
        max-width: 200px;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 45px !important;
    }
    
    .btn-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }

    /* Compact chip/tag layout for skills on mobile to avoid empty vertical spaces */
    .skill-list {
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 10px !important;
    }
    
    .skill-item {
        width: auto !important;
        padding: 8px 14px !important;
        border-radius: 8px !important;
        background: rgba(255, 255, 255, 0.02) !important;
        border: 1px solid rgba(255, 255, 255, 0.05) !important;
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
    }

    .skill-name {
        font-size: 0.85rem !important;
    }
}

/* Botón Subir al Inicio (Scroll to Top) */
.scroll-btn {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(10, 10, 10, 0.85);
    border: 1px solid var(--glass-border);
    color: var(--accent-cyan);
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.15);
    backdrop-filter: blur(8px);
}

.scroll-btn.show {
    opacity: 1;
    visibility: visible;
}

.scroll-btn:hover {
    background: rgba(212, 175, 55, 0.08);
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.3);
}

@media (max-width: 768px) {
    .scroll-btn {
        bottom: 24px;
        right: 24px;
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
}

/* Decorative Circuit Sidebars */
.decor-circuit {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 80px;
    pointer-events: none;
    z-index: 1;
    display: block;
    overflow: hidden;
}

.decor-left {
    left: 20px;
}

.decor-right {
    right: 20px;
}

@media (max-width: 1300px) {
    .decor-circuit {
        display: none;
    }
}

/* Projects Section & Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    position: relative;
    padding: 32px;
    border-radius: 16px;
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.03) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-cyan);
    box-shadow: 0 8px 30px rgba(0, 242, 254, 0.15);
}

.project-card:hover::before {
    opacity: 1;
}

.project-badge {
    align-self: flex-start;
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid rgba(212, 175, 55, 0.25);
    color: var(--accent-cyan);
    font-size: 0.75rem;
    font-family: var(--font-code);
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    margin-bottom: 14px;
}

.project-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.project-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    flex-grow: 1;
}

.project-more {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-cyan);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.project-card:hover .project-more {
    color: var(--accent-blue);
    gap: 10px;
}

/* Modals / Lightbox */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(16px);
    z-index: 10000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    overflow-y: auto;
    padding: 60px 0;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 90%;
    max-width: 650px;
    position: relative;
    padding: 40px;
    border-radius: 20px;
    border: 1.5px solid var(--accent-cyan);
    box-shadow: 0 0 40px rgba(0, 242, 254, 0.2);
    margin: auto;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2.2rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-smooth);
}

.modal-close:hover {
    color: var(--accent-cyan);
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.3;
}

.modal-subtitle {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 16px;
    display: block;
    font-family: var(--font-code);
}

.modal-text {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.modal-bullets {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 8px;
    padding-left: 20px;
}

.modal-bullets li {
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-bullets li strong {
    color: var(--text-primary);
}

/* PCB Calculator Section & Grid */
.pcb-tool-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 32px;
    align-items: stretch;
}

.pcb-layers-diagram {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: rgba(0, 0, 0, 0.4);
    padding: 24px 24px 24px 60px; /* extra space for the bracket */
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    position: relative;
    margin-bottom: 24px;
}

.pcb-layer {
    position: relative;
    height: 26px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    font-size: 0.8rem;
    font-family: var(--font-code);
    transition: var(--transition-smooth);
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
}

.pcb-layer:hover {
    transform: scale(1.015);
    box-shadow: 0 0 12px rgba(212, 175, 55, 0.25);
    z-index: 10;
}

/* Layer highlighting and connection styles */
.pcb-layer.in-calc-model {
    /* Subtle indication of being part of the calculation model */
    border-left: 3px solid rgba(212, 175, 55, 0.4) !important;
}

/* Dedicated Stable Bracket placed in pcb-layers-diagram container */
.pcb-calc-bracket {
    position: absolute;
    left: 40px;
    width: 10px;
    border-top: 2px solid var(--accent-cyan);
    border-bottom: 2px solid var(--accent-cyan);
    border-left: 2px solid var(--accent-cyan);
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
    pointer-events: none;
    z-index: 10;
    transition: var(--transition-smooth);
}

.pcb-calc-bracket span {
    position: absolute;
    top: 50%;
    left: -28px;
    transform: translateY(-50%);
    font-size: 0.62rem;
    font-weight: 800;
    color: var(--accent-cyan);
    font-family: var(--font-code);
    writing-mode: vertical-rl;
    text-orientation: upright;
    letter-spacing: 0px;
}

/* GND Reference layer highlight (using outline to avoid vertical shifts) */
.pcb-layer.gnd-ref-highlight {
    outline: 2px solid var(--accent-cyan);
    outline-offset: -2px;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.35) !important;
    z-index: 5;
}

/* Active Hover custom shadow */
.pcb-layer.active-hover {
    transform: scale(1.015);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.4) !important;
    z-index: 10;
}

.pcb-layer.active-hover.gnd-ref-highlight {
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.6) !important;
}

/* Colors based on layer type and role */
.pcb-layer.copper.layer-signal {
    background: linear-gradient(90deg, #aa771c 0%, #ffdf7a 50%, #aa771c 100%);
    color: #000000;
    font-weight: bold;
    border: 1px solid rgba(212, 175, 55, 0.6);
}

.pcb-layer.copper.layer-plane {
    background: linear-gradient(90deg, #8a6d20 0%, #c5a03c 50%, #8a6d20 100%);
    color: #000000;
    font-weight: bold;
    border: 1px solid rgba(138, 109, 32, 0.4);
}

.pcb-layer.dielectric {
    background: #836e5f;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.pcb-layer.prepreg {
    background: #10351b;
    color: #aae0b8;
    border: 1px solid rgba(170, 224, 184, 0.12);
}

.pcb-layer-thickness {
    font-weight: 600;
    opacity: 0.9;
}

/* Stackup Explanation Box */
.stackup-explanation {
    margin-top: 28px;
    margin-bottom: 24px;
    padding: 14px 18px;
    background: rgba(212, 175, 55, 0.03);
    border: 1px solid rgba(212, 175, 55, 0.15);
    border-radius: 10px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
    text-align: justify;
}

/* Stackup Legend hover animations */
.stackup-legend span {
    transition: var(--transition-smooth);
    border-radius: 4px;
    padding: 2px 6px;
    display: inline-flex;
    align-items: center;
}

.stackup-legend span.highlight-legend {
    transform: scale(1.05);
    background: rgba(212, 175, 55, 0.08);
    box-shadow: 0 0 8px rgba(212, 175, 55, 0.15);
    color: var(--accent-cyan) !important;
}

.stackup-tab {
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.stackup-tab.active {
    opacity: 1;
    border-color: var(--accent-cyan);
    background: rgba(0, 242, 254, 0.08);
    color: var(--accent-cyan);
}

@media (max-width: 900px) {
    .projects-grid, .pcb-tool-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* Custom Language Dropdown */
.lang-dropdown {
    position: relative;
    display: inline-block;
}

.lang-dropdown-trigger {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.lang-dropdown-trigger:hover, .lang-dropdown-trigger:focus-visible {
    color: var(--accent-cyan);
    background: rgba(212, 175, 55, 0.05);
}

.lang-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: #000000;
    border: 1px solid var(--accent-cyan);
    border-radius: 8px;
    padding: 6px 0;
    margin-top: 6px;
    list-style: none;
    min-width: 130px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
    z-index: 1000;
    text-align: left;
}

.lang-dropdown-menu.show {
    display: block;
}

.lang-dropdown-item {
    padding: 8px 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
    user-select: none;
}

.lang-dropdown-item:hover, .lang-dropdown-item:focus-visible {
    background: rgba(212, 175, 55, 0.05);
    color: var(--accent-cyan);
    outline: none;
}

.lang-dropdown-item.active {
    color: var(--accent-cyan);
    font-weight: 600;
    background: rgba(212, 175, 55, 0.08);
}

@media (max-width: 768px) {
    .section-title {
        font-size: 1.85rem !important;
        line-height: 1.20 !important;
        margin-bottom: 14px !important;
    }
    
    .badge {
        font-size: 0.65rem !important;
        letter-spacing: 0.5px !important;
        padding: 4px 10px !important;
        white-space: nowrap !important;
        margin-bottom: 20px !important;
        display: inline-flex !important;
        align-self: flex-start !important;
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .timeline-date {
        align-self: flex-start;
    }
    .stackup-legend {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
        padding: 0 16px;
    }
    .lang-dropdown-li {
        width: 100%;
        margin-left: 0 !important;
        margin-top: 10px;
    }
    .lang-dropdown {
        width: 100%;
    }
    .lang-dropdown-trigger {
        width: 100%;
        justify-content: space-between;
        border: 1px solid var(--accent-cyan);
        background: #000000;
    }
    .lang-dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        border-left: none;
        border-right: none;
        border-radius: 0 0 8px 8px;
        margin-top: 0;
        background: rgba(0, 0, 0, 0.2);
    }
    
    /* Prevent iOS Safari auto-zoom on form elements and fix card/calculator overflow on mobile */
    input, select, textarea {
        font-size: 16px !important;
    }
    
    .glass-card {
        padding: 20px !important;
    }
    
    .pcb-layers-diagram {
        padding: 16px 16px 16px 50px !important;
    }
    
    .pcb-calc-bracket {
        left: 26px !important;
    }
    
    .pcb-calc-bracket span {
        left: -22px !important;
        font-size: 0.58rem !important;
        letter-spacing: 0px !important;
    }
    
    .pcb-layer {
        padding: 0 8px !important;
        font-size: 0.68rem !important;
    }
    
    .pcb-layer-thickness {
        font-size: 0.68rem !important;
    }
    
    .calc-buttons-container, .stackup-controls {
        flex-wrap: wrap !important;
    }
    
    .contact-info-title {
        font-size: 1.45rem !important;
        white-space: nowrap !important;
    }
}

/* Trajectory Collapsible Details */
.timeline-details {
    max-height: 2000px;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0, 1, 0, 1), opacity 0.3s ease;
    opacity: 1;
    margin-top: 10px;
}

.timeline-details.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    pointer-events: none;
}

.btn-toggle-details {
    margin-top: 14px;
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 6px;
    border: 1px solid rgba(212, 175, 55, 0.25);
    background: none;
    color: var(--text-primary);
    cursor: pointer;
    font-family: var(--font-code);
    transition: var(--transition-smooth);
}

.btn-toggle-details:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 242, 254, 0.05);
}

/* Trajectory split block margins */
.trajectory-block {
    margin-bottom: 40px;
}

.trajectory-block-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.trajectory-block-title i {
    font-size: 1.2rem;
}

/* Accessibility Focus Outline */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--accent-cyan) !important;
    outline-offset: 3px !important;
}

/* Project tags layout */
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    margin-top: 12px;
}

.project-tags span {
    font-size: 0.75rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: var(--font-code);
}

/* Bitácora / Engineering Log styles */
.blog-post-card {
    background: rgba(10, 10, 10, 0.88);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 24px;
    transition: var(--transition-smooth);
    text-align: left;
}

.blog-post-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.1);
}

.blog-post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.blog-post-category {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    font-family: var(--font-code);
    text-transform: uppercase;
    font-weight: 600;
}

.blog-post-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.blog-post-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.blog-post-summary {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.blog-post-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Project Card Button reset */
button.project-card {
    background: none;
    border: 1px solid var(--glass-border);
    padding: 32px;
    text-align: left;
    font-family: inherit;
    font-size: inherit;
    width: 100%;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

button.project-card .project-content {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    width: 100%;
}

button.project-card .project-title,
button.project-card .project-desc,
button.project-card .project-more {
    display: block;
}

button.project-card .project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

button.project-card:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 4px;
}

/* Custom styles migrated from inline HTML */
.logo-img {
    height: 65px;
    width: auto;
    display: block;
    filter: drop-shadow(0px 0px 6px rgba(212, 175, 55, 0.35));
}

.chip-logo {
    width: 50px;
    height: 50px;
    object-fit: contain;
    position: absolute;
    z-index: 2;
    filter: drop-shadow(0px 0px 4px rgba(212, 175, 55, 0.45));
}

.stackup-info-box {
    margin-top: 24px;
    padding: 12px;
    background: rgba(212, 175, 55, 0.04);
    border: 1px solid rgba(212, 175, 55, 0.15);
    border-radius: 8px;
    font-size: 0.85rem;
    min-height: 50px;
    color: var(--text-secondary);
    text-align: center;
}

.calc-buttons-container {
    margin-top: 10px;
    display: flex;
    justify-content: center;
    gap: 8px;
}

.btn-copy-custom {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 6px;
    border-color: rgba(212, 175, 55, 0.25);
}

.btn-reset-custom {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 6px;
    border-color: rgba(255, 0, 0, 0.25);
    color: #ff5555;
}

.calc-select {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: sans-serif;
}

.btn-whatsapp-custom {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-color: rgba(212, 175, 55, 0.25);
    padding: 8px 16px;
    margin-top: 4px;
}

.contact-info-title {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.contact-info-desc {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.stackup-controls {
    margin-bottom: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.tool-subtitle {
    max-width: 700px;
    margin: 0 auto 40px auto;
    color: var(--text-secondary);
}

.stackup-legend {
    margin-top: 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 24px;
    font-size: 0.82rem;
    color: var(--text-muted);
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
}

.calc-header {
    text-align: center;
    margin-bottom: 28px;
}

.calc-display-lbl {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-family: var(--font-code);
}

.impedance-display {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-cyan);
    margin: 8px 0;
    font-family: var(--font-code);
}

.impedance-display span {
    font-size: 1.5rem;
    font-weight: 500;
}

.impedance-status {
    font-size: 0.9rem;
    color: var(--accent-green);
    font-weight: 500;
}

.calc-sliders {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 12px;
    margin-bottom: 30px;
}

.slider-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.slider-info span:first-child {
    font-weight: 600;
    color: var(--text-secondary);
}

.val-display {
    font-family: var(--font-code);
    color: var(--accent-cyan);
    font-weight: 600;
}

.slider-input {
    width: 100%;
    accent-color: var(--accent-cyan);
}

.calc-range-lbl {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.calc-education-block {
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.calc-education-block p {
    margin-bottom: 8px;
}

.calc-education-block p:nth-child(2) {
    margin-bottom: 12px;
}

.calc-education-block p:nth-child(3) {
    margin-bottom: 10px;
    font-weight: 500;
}

.calc-disclaimer {
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px dashed rgba(255,255,255,0.1);
    padding-top: 8px;
    font-style: italic;
}

/* Print Stylesheet (Ctrl + P or PDF Export) */
@media print {
    header, footer, .btn-group, .social-links, #scroll-to-top, .decor-circuit, .pcb-visualizer, .lang-selector-item, .project-filters, .calc-card, .stackup-controls, .stackup-legend, #layer-info-box, .project-more {
        display: none !important;
    }
    
    body {
        margin: 0 !important;
        padding: 0 !important;
        border: none !important;
        background: #ffffff !important;
        color: #000000 !important;
        font-size: 11pt !important;
    }
    
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        background-color: transparent !important;
        color: #000000 !important;
    }
    
    .container {
        max-width: 100% !important;
        width: 100% !important;
        padding: 0 10mm !important;
    }
    
    section {
        padding: 10px 0 !important;
        page-break-inside: avoid;
    }
    
    .timeline::before {
        display: none;
    }
    
    .timeline-item {
        margin-bottom: 25px !important;
        padding-left: 0 !important;
        page-break-inside: avoid;
    }
    
    .timeline-dot {
        display: none;
    }
    
    .timeline-header {
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        border-bottom: 1.5px solid #000000 !important;
        padding-bottom: 4px !important;
        margin-bottom: 8px !important;
    }
    
    .timeline-company {
        font-weight: bold !important;
        color: #000000 !important;
    }
    
    .timeline-title {
        font-size: 1.15rem !important;
        color: #000000 !important;
        margin-top: 2px !important;
    }
    
    .timeline-date {
        color: #333333 !important;
        font-family: sans-serif !important;
        font-size: 0.95rem !important;
    }
    
    .timeline-desc, .timeline-bullets li {
        color: #111111 !important;
    }
    
    .skills-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 15px !important;
    }
    
    .skill-item {
        background: none !important;
        border: 1px solid #cccccc !important;
        color: #000000 !important;
        padding: 6px 10px !important;
    }
    
    .skill-name {
        color: #000000 !important;
    }
}