/* ============================================================
   glsec.us — Design System
   Theme: Catppuccin Mocha (dark default) / Latte (light)
   ============================================================ */

/* --- Catppuccin Mocha Tokens (Dark — Default) --- */
:root {
    --ctp-base: #1e1e2e;
    --ctp-mantle: #181825;
    --ctp-crust: #11111b;
    --ctp-surface0: #313244;
    --ctp-surface1: #45475a;
    --ctp-surface2: #585b70;
    --ctp-overlay0: #6c7086;
    --ctp-overlay1: #7f849c;
    --ctp-text: #cdd6f4;
    --ctp-subtext1: #bac2de;
    --ctp-subtext0: #a6adc8;
    --ctp-lavender: #b4befe;
    --ctp-blue: #89b4fa;
    --ctp-sapphire: #74c7ec;
    --ctp-teal: #94e2d5;
    --ctp-green: #a6e3a1;
    --ctp-yellow: #f9e2af;
    --ctp-peach: #fab387;
    --ctp-mauve: #cba6f7;
    --ctp-pink: #f5c2e7;
    --ctp-red: #f38ba8;
    --ctp-rosewater: #f5e0dc;

    /* Semantic Aliases */
    --bg-primary: var(--ctp-base);
    --bg-secondary: var(--ctp-mantle);
    --bg-card: var(--ctp-surface0);
    --bg-card-hover: var(--ctp-surface1);
    --border-color: var(--ctp-surface1);
    --border-subtle: rgba(180, 190, 254, 0.08);
    --text-primary: var(--ctp-text);
    --text-secondary: var(--ctp-subtext0);
    --text-muted: var(--ctp-overlay1);
    --accent: var(--ctp-lavender);
    --accent-secondary: var(--ctp-sapphire);
    --accent-glow: rgba(180, 190, 254, 0.15);
    --hero-gradient: linear-gradient(135deg, var(--ctp-crust) 0%, var(--ctp-base) 50%, var(--ctp-mantle) 100%);
    --card-glass: rgba(49, 50, 68, 0.6);
    --card-border: rgba(180, 190, 254, 0.12);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --nav-bg: rgba(24, 24, 37, 0.85);
    --timeline-line: var(--ctp-surface1);
    --timeline-dot: var(--ctp-lavender);
}

/* --- Catppuccin Latte Tokens (Light Mode) --- */
[data-theme="light"] {
    --ctp-base: #eff1f5;
    --ctp-mantle: #e6e9ef;
    --ctp-crust: #dce0e8;
    --ctp-surface0: #ccd0da;
    --ctp-surface1: #bcc0cc;
    --ctp-surface2: #acb0be;
    --ctp-overlay0: #9ca0b0;
    --ctp-overlay1: #8c8fa1;
    --ctp-text: #4c4f69;
    --ctp-subtext1: #5c5f77;
    --ctp-subtext0: #6c6f85;
    --ctp-lavender: #7287fd;
    --ctp-blue: #1e66f5;
    --ctp-sapphire: #209fb5;
    --ctp-teal: #179299;
    --ctp-green: #40a02b;
    --ctp-yellow: #df8e1d;
    --ctp-peach: #fe640b;
    --ctp-mauve: #8839ef;
    --ctp-pink: #ea76cb;
    --ctp-red: #d20f39;
    --ctp-rosewater: #dc8a78;

    --bg-primary: var(--ctp-base);
    --bg-secondary: var(--ctp-mantle);
    --bg-card: var(--ctp-mantle);
    --bg-card-hover: var(--ctp-surface0);
    --border-color: var(--ctp-surface1);
    --border-subtle: rgba(114, 135, 253, 0.1);
    --text-primary: var(--ctp-text);
    --text-secondary: var(--ctp-subtext0);
    --text-muted: var(--ctp-overlay1);
    --accent: var(--ctp-lavender);
    --accent-secondary: var(--ctp-sapphire);
    --accent-glow: rgba(114, 135, 253, 0.1);
    --hero-gradient: linear-gradient(135deg, var(--ctp-crust) 0%, var(--ctp-base) 50%, var(--ctp-mantle) 100%);
    --card-glass: rgba(230, 233, 239, 0.7);
    --card-border: rgba(114, 135, 253, 0.15);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --nav-bg: rgba(239, 241, 245, 0.88);
    --timeline-line: var(--ctp-surface1);
    --timeline-dot: var(--ctp-lavender);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
    color: var(--accent-secondary);
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-header {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
    padding-bottom: 0.75rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 2.5rem;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    max-width: 600px;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
}

.nav-logo {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 0.875rem;
    border-radius: 0.5rem;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    background: var(--accent-glow);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
    width: 2.25rem;
    height: 2.25rem;
    margin-left: 0.5rem;
}

.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-glow);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--hero-gradient);
    position: relative;
    overflow: hidden;
    padding-top: 4rem;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, var(--accent-glow) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(116, 199, 236, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(203, 166, 247, 0.05) 0%, transparent 50%);
    animation: heroShift 15s ease-in-out infinite alternate;
}

@keyframes heroShift {
    0% { opacity: 0.6; transform: scale(1); }
    100% { opacity: 1; transform: scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    padding: 0 1.5rem;
}

.hero-avatar {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--card-border);
    box-shadow: 0 0 40px var(--accent-glow), var(--shadow-lg);
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 60px var(--accent-glow), var(--shadow-lg);
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.hero-title {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 400;
    color: var(--accent);
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.hero-tagline {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 560px;
    margin: 0 auto 2.5rem;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background: var(--accent);
    color: var(--ctp-crust);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 0.75rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
    color: var(--ctp-crust);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    font-size: 1.25rem;
    animation: bounceDown 2s ease-in-out infinite;
}

@keyframes bounceDown {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.highlight-card {
    background: var(--card-glass);
    border: 1px solid var(--card-border);
    border-radius: 0.875rem;
    padding: 1.25rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.highlight-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.highlight-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.highlight-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.25rem;
}

.highlight-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================================
   EXPERIENCE / TIMELINE
   ============================================================ */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--timeline-line), transparent);
    border-radius: 1px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
    padding-left: 1.5rem;
}

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 10px;
    height: 10px;
    background: var(--timeline-dot);
    border-radius: 50%;
    border: 2px solid var(--bg-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
    transition: box-shadow 0.2s ease;
}

.timeline-item:hover::before {
    box-shadow: 0 0 0 5px var(--accent-glow), 0 0 15px var(--accent-glow);
}

.timeline-period {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.15rem;
}

.timeline-role {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.timeline-details {
    list-style: none;
    padding: 0;
}

.timeline-details li {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.7;
    padding-left: 1.25rem;
    margin-bottom: 0.35rem;
}

.timeline-details li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 1.55;
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.25rem;
}

.project-card {
    background: var(--card-glass);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.75rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    opacity: 0;
    transition: opacity 0.25s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 30px var(--accent-glow);
}

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

.project-icon {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.project-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.project-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 0.25rem 0.65rem;
    border-radius: 1rem;
    letter-spacing: 0.02em;
}

/* ============================================================
   EDUCATION
   ============================================================ */
.education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.education-card {
    background: var(--card-glass);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.75rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.education-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.education-year {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.education-school {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.education-degree {
    font-size: 0.925rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.contact-card {
    background: var(--card-glass);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    display: block;
}

.contact-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: 0 8px 25px var(--accent-glow);
    color: var(--text-primary);
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.25rem;
}

.contact-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================================
   SCROLL REVEAL ANIMATION
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children for grids */
.reveal-stagger .reveal {
    transition-delay: calc(var(--stagger-index, 0) * 80ms);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.25rem;
    }

    .section {
        padding: 3.5rem 0;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--nav-bg);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-subtle);
        gap: 0;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        padding: 0.75rem 1rem;
        width: 100%;
        border-radius: 0.5rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-name {
        font-size: 2.25rem;
    }

    .about-highlights {
        grid-template-columns: 1fr 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .education-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 1.5rem;
    }

    .timeline-item {
        padding-left: 1rem;
    }

    .timeline-item::before {
        left: -1.5rem;
    }
}

@media (max-width: 480px) {
    .about-highlights {
        grid-template-columns: 1fr;
    }

    .hero-avatar {
        width: 100px;
        height: 100px;
    }
}

/* ============================================================
   PRINT
   ============================================================ */
@media print {
    .nav, .footer, .hero-scroll-indicator, .theme-toggle, .mobile-menu-btn {
        display: none !important;
    }

    .hero {
        min-height: auto;
        padding: 2rem 0;
        background: white !important;
    }

    .section {
        padding: 1.5rem 0;
        page-break-inside: avoid;
    }

    body {
        color: #111 !important;
        background: white !important;
    }

    .project-card, .education-card, .contact-card, .highlight-card {
        border: 1px solid #ddd !important;
        background: white !important;
    }

    .reveal {
        opacity: 1 !important;
        transform: none !important;
    }
}