/* ========== CSS Variables ========== */
:root {
    --bg:           #08090d;
    --bg-secondary: #0f1117;
    --fg:           #e8eaed;
    --muted:        #6b7280;
    --accent:       #00d9b5;
    --accent-dim:   rgba(0, 217, 181, 0.15);
    --card:         #12141a;
    --border:       #1f2937;
    --glow:         rgba(0, 217, 181, 0.4);

    /* Shadow tokens */
    --shadow-sm:    0 2px  8px rgba(0, 0, 0, 0.35);
    --shadow-md:    0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg:    0 16px 48px rgba(0, 0, 0, 0.55);
    --shadow-glow:  0 10px 30px var(--glow);

    /* Canvas particle color — read by JS */
    --canvas-color: rgba(0, 217, 181, 0.55);

    /* Transition speed for theme switching */
    --theme-transition: 0.3s ease;

    /* FIX 9: header height token — achievements.css references this
       instead of a hardcoded 80px, so it stays in sync if JS changes it. */
    --header-h: 72px;

    color-scheme: dark;
}

/* ========== Smooth Theme Transitions ==========
   FIX 1: Scope to layout elements only. Applying this to * causes
   background-color to transition on :root itself (and canvas, SVG nodes)
   during first paint, producing a flash-of-wrong-theme and layout jitter.
   Pseudo-elements are excluded via explicit selectors below. ========== */
body,
.header,
.nav-links,
.logo,
.btn,
.nav-link,
.skill-card,
.project-card,
.timeline-card,
.contact-link,
.contact-card,
.credential-badge,
.footer,
.footer-social a,
.terminal-btn,
.terminal-modal,
.terminal-header,
.terminal-body,
.terminal-input,
.terminal-input-line,
.about-image-frame,
.mobile-overlay,
.section-alt,
.tag,
.timeline-dot {
    transition:
        background-color var(--theme-transition),
        border-color     var(--theme-transition),
        color            var(--theme-transition),
        box-shadow       var(--theme-transition),
        outline-color    var(--theme-transition);
}

/* Elements with their own carefully-tuned transitions get full control */
.btn,
.btn-primary,
.btn-secondary,
.nav-link,
.nav-link::after,
.logo,
.skill-card,
.project-card,
.timeline-card,
.contact-link,
.credential-badge,
.footer-social a,
.terminal-btn,
.about-image-frame,
.about-photo,
.name-highlight::after,
.skill-level-fill,
.theme-toggle-thumb,
.theme-toggle .icon-sun,
.theme-toggle .icon-moon,
.theme-toggle-track {
    transition-property: background-color, border-color, color, box-shadow,
                         outline-color, transform, opacity, filter, width;
}


/* ========== Base Styles ========== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg);
    color: var(--fg);
    overflow-x: hidden;
    line-height: 1.6;
}

::selection {
    background: var(--accent);
    color: var(--bg);
}


/* ========== Custom Scrollbar ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

/* FIX/E8: Scrollbar thumb now has a subtle teal tint at rest —
   feels alive without shouting. Pure hover snap replaced with a
   pre-tinted gradient so the transition is never jarring. */
::-webkit-scrollbar-thumb {
    background: linear-gradient(
        180deg,
        var(--border),
        color-mix(in srgb, var(--border) 55%, var(--accent))
    );
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}


/* ========== Utility Classes ========== */
.font-mono {
    font-family: 'JetBrains Mono', monospace;
}

.accent {
    color: var(--accent);
}

.text-center {
    text-align: center;
}

.mt-12 {
    margin-top: 3rem;
}


/* ==========================================================================
   NEURAL CANVAS
   ========================================================================== */
#neural-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    transition: opacity 0.6s ease;
}


/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    transition: background 0.3s ease, border-color 0.3s ease,
                box-shadow 0.3s ease, backdrop-filter 0.3s ease;
    background: transparent;
}

.header.scrolled {
    background: rgba(8, 9, 13, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--fg);
    text-decoration: none;
    transition: transform 0.3s ease, color var(--theme-transition);
}

.logo:hover {
    transform: scale(1.05);
}

/* Desktop nav — no background, just a flex row */
.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    position: relative;
    color: var(--muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
}

/* E4: Nav underline now uses the same gradient as the cert ribbon —
   cohesive design language across the whole portfolio. */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), #00e8c8, #00ffcc);
    transition: width 0.3s ease;
}

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

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


/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease,
                background-color var(--theme-transition),
                border-color var(--theme-transition),
                color var(--theme-transition);
    cursor: pointer;
    border: none;
    font-family: 'Outfit', sans-serif;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--fg);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}


/* ========== Focus States (Accessibility) ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}


/* ==========================================================================
   MOBILE MENU
   ========================================================================== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--fg);
    transition: all 0.3s ease, background-color var(--theme-transition);
    border-radius: 2px;
}

/* Hamburger → X animation */
.mobile-menu-btn.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.mobile-menu-btn.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
}

.mobile-overlay.open {
    display: block;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    /* Mobile DRAWER */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 5rem 2rem;
        gap: 1.5rem;
        transition: right 0.3s ease, background-color var(--theme-transition),
                    border-color var(--theme-transition), box-shadow 0.3s ease;
        border-left: 1px solid var(--border);
        z-index: 95;
    }

    .nav-links.open {
        right: 0;
    }
}


/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    /* FIX 2: Use the --header-h token so padding always clears the fixed nav,
       including on small screens where the header wraps to a taller height. */
    padding: calc(var(--header-h) + 4rem) 2rem 6rem;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent-dim);
    border: 1px solid rgba(0, 217, 181, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

/* E5: Pulse dot now uses box-shadow instead of transform:scale —
   no layout jitter, more premium glow feel. */
.hero-label::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(0, 217, 181, 0);
    }
    50% {
        opacity: 0.7;
        box-shadow: 0 0 0 5px rgba(0, 217, 181, 0.25);
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--fg);
}

/* FIX 7: transform-origin no longer switches mid-transition.
   Keep it always at 'left'; the underline grows left→right on hover
   and shrinks left→right on mouseout (scaleX 1→0 from origin left
   reads as a clean retract rather than a jarring flip). */
.name-highlight {
    position: relative;
    color: var(--accent);
    cursor: default;
}

.name-highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease, background-color var(--theme-transition);
}

.name-highlight:hover::after {
    transform: scaleX(1);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--muted);
    margin-bottom: 2rem;
    max-width: 600px;
}

.typing-text {
    color: var(--accent);
    border-right: 2px solid var(--accent);
    animation: blink 1s step-end infinite;
    padding-right: 4px;
}

@keyframes blink {
    50% { border-color: transparent; }
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    max-width: 500px;
}

.stat-item {
    text-align: left;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    transition: color var(--theme-transition);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--muted);
}


/* ==========================================================================
   SECTION CHROME
   ========================================================================== */
.section {
    padding: 6rem 2rem;
    position: relative;
    z-index: 1;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    /* FIX 12: position:relative so any absolutely-positioned descendant
       is correctly contained within the header block. */
    position: relative;
}

/* E6: Letter-spacing corrected to 0.15em for optical uniformity
   at JetBrains Mono 0.85rem on high-DPI displays. */
.section-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--fg);
}

.section-desc {
    color: var(--muted);
    max-width: 600px;
    margin: 0 auto;
}


/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.about-image-frame {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--card);
    box-shadow: var(--shadow-md);
    transition: transform 0.4s ease, box-shadow 0.4s ease,
                border-color var(--theme-transition),
                background-color var(--theme-transition);
}

.about-image-frame:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.about-photo {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 3/4;
    object-fit: cover;
    filter: grayscale(20%) contrast(1.1);
    transition: filter 0.5s ease, transform 0.5s ease;
}

.about-image-frame:hover .about-photo {
    filter: grayscale(0%) contrast(1.1);
    transform: scale(1.03);
}

/* FIX 8: overlay now references var(--accent-dim) so it automatically
   adapts to both dark and light accent values — no separate override needed. */
.about-image-frame::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-dim), transparent 50%);
    pointer-events: none;
}

.about-credentials {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.credential-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--card);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    transition: border-color 0.3s ease, transform 0.3s ease,
                background-color var(--theme-transition),
                box-shadow 0.3s ease;
}

.credential-badge:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.credential-badge svg {
    width: 16px;
    height: 16px;
    color: var(--accent);
}

.about-content h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--fg);
}

.about-content p {
    color: var(--muted);
    margin-bottom: 1rem;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

@media (max-width: 500px) {
    .about-highlights {
        grid-template-columns: 1fr;
    }
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.highlight-icon {
    width: 24px;
    height: 24px;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.highlight-text p {
    font-size: 0.85rem;
    color: var(--muted);
    margin: 0;
}


/* ==========================================================================
   TIMELINE (Experience)
   ========================================================================== */
.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

/* Vertical guide line */
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
    transition: background-color var(--theme-transition);
}

@media (min-width: 768px) {
    .timeline::before {
        left: 50%;
        transform: translateX(-50%);
    }
}

.timeline-item {
    position: relative;
    padding-left: 2rem;
    padding-bottom: 3rem;
}

/* FIX 3: Last timeline item removes bottom padding so the guide line
   doesn't visually overshoot the final dot. */
.timeline-item:last-child {
    padding-bottom: 0;
}

@media (min-width: 768px) {
    .timeline-item {
        width: 50%;
        padding-left: 0;
        padding-right: 3rem;
    }

    .timeline-item:nth-child(even) {
        margin-left: 50%;
        padding-right: 0;
        padding-left: 3rem;
    }
}

/* Timeline dot */
.timeline-dot {
    position: absolute;
    left: -5px;
    top: 4px;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    border: 3px solid var(--bg);
    /* E2: Dual-ring sonar effect on hover — far more premium than single ring. */
    box-shadow: 0 0 0 0 rgba(0, 217, 181, 0),
                0 0 0 0 rgba(0, 217, 181, 0);
    transition: box-shadow 0.4s ease, background-color var(--theme-transition),
                border-color var(--theme-transition);
    z-index: 1;
}

.timeline-item:hover .timeline-dot {
    box-shadow: 0 0 0 4px rgba(0, 217, 181, 0.25),
                0 0 0 8px rgba(0, 217, 181, 0.08);
}

@media (min-width: 768px) {
    .timeline-dot {
        left: auto;
        right: -6px;
        top: 20px;
    }

    .timeline-item:nth-child(even) .timeline-dot {
        right: auto;
        left: -6px;
    }
}

/* Timeline card */
.timeline-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease,
                background-color var(--theme-transition);
}

.timeline-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.timeline-date {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    letter-spacing: 0.5px;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--fg);
}

.timeline-company {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 1rem;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.6;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Tags — shared across timeline, skills, projects */
.tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 100px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.3px;
    transition: background-color var(--theme-transition),
                color var(--theme-transition),
                border-color var(--theme-transition);
}


/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-container {
    max-width: 1200px;
    margin: 0 auto;
}

.skills-categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.skill-category-btn {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    border-radius: 8px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.3s ease, color 0.3s ease, background-color 0.3s ease,
                box-shadow 0.3s ease;
}

.skill-category-btn:hover,
.skill-category-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.skill-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: default;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease,
                background-color var(--theme-transition);
}

.skill-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md), 0 0 15px rgba(0, 217, 181, 0.1);
}

.skill-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 1rem;
    color: var(--accent);
}

.skill-name {
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--fg);
}

.skill-level {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    transition: background-color var(--theme-transition);
}

/* FIX/E1: Three-stop gradient adds a subtle mid-shimmer so the bar reads
   as luminous rather than flat. The #00e8c8 mid-stop is the geometric mean
   between the accent and the pure cyan — natural optical progression. */
.skill-level-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #00e8c8 50%, #00f0cc);
    border-radius: 2px;
    transition: width 1s ease;
}


/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */

/* FIX 6: Breakpoint raised to 480px — catches all phones in the 401-479px
   range that were previously rendering a single 350px column wider than
   the viewport (causing horizontal scroll). */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease,
                background-color var(--theme-transition);
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 217, 181, 0.1);
}

.project-image {
    position: relative;
    height: 180px;
    background: linear-gradient(135deg, var(--bg-secondary), var(--card));
    overflow: hidden;
    transition: background var(--theme-transition);
}

.project-image-pattern {
    position: absolute;
    inset: 0;
    opacity: 0.1;
    background-image:
        linear-gradient(var(--accent) 1px, transparent 1px),
        linear-gradient(90deg, var(--accent) 1px, transparent 1px);
    background-size: 20px 20px;
    transition: opacity var(--theme-transition);
}

.project-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: var(--accent-dim);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    border: 1px solid rgba(0, 217, 181, 0.3);
    transition: background-color var(--theme-transition),
                border-color var(--theme-transition),
                box-shadow 0.3s ease;
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--fg);
}

.project-desc {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.3s ease, color var(--theme-transition);
}

.project-link:hover {
    opacity: 0.7;
}

.project-link svg {
    width: 14px;
    height: 14px;
}


/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 3rem 2rem;
    margin-top: 3rem;
    box-shadow: var(--shadow-md);
    transition: background-color var(--theme-transition),
                border-color var(--theme-transition),
                box-shadow var(--theme-transition);
}

.contact-icon {
    margin: 0 auto 1.5rem;
    color: var(--accent);
}

.contact-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--fg);
}

.contact-desc {
    color: var(--muted);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--fg);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease,
                background-color var(--theme-transition), color var(--theme-transition);
}

.contact-link:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-link svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
}


/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    z-index: 1;
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--fg);
    margin-bottom: 1rem;
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.footer-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--muted);
    text-decoration: none;
    transition: border-color 0.3s ease, color 0.3s ease, transform 0.3s ease,
                background-color var(--theme-transition), box-shadow 0.3s ease;
}

.footer-social a:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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


/* ==========================================================================
   TERMINAL WIDGET
   ========================================================================== */
.terminal-trigger {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 50;
}

.terminal-btn {
    width: 50px;
    height: 50px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--muted);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.3s ease, color 0.3s ease,
                background-color var(--theme-transition), box-shadow 0.3s ease;
}

.terminal-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow-md), 0 0 12px rgba(0, 217, 181, 0.15);
}

/* FIX 13 (CSS side): Replace display:none/block toggle with
   visibility + opacity + pointer-events so the closedown can be
   animated. JS still adds/removes .open — but now the CSS does the
   actual fading instead of blinking on/off. The slideUp keyframe fires
   on open; closing lets opacity:0 + visibility:hidden fade out smoothly. */
.terminal-modal {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    position: fixed;
    bottom: 6rem;
    right: 2rem;
    width: 450px;
    max-width: calc(100vw - 2rem);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    z-index: 60;
    box-shadow: var(--shadow-lg);
    transform: translateY(12px);
    transition: opacity 0.25s ease, transform 0.25s ease,
                visibility 0s linear 0.25s,
                background-color var(--theme-transition),
                border-color var(--theme-transition);
}

.terminal-modal.open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
    transition: opacity 0.25s ease, transform 0.25s ease,
                visibility 0s linear 0s,
                background-color var(--theme-transition),
                border-color var(--theme-transition);
}

.terminal-header {
    background: var(--bg);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
    transition: background-color var(--theme-transition),
                border-color var(--theme-transition);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-title {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
}

.terminal-body {
    padding: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    max-height: 300px;
    overflow-y: auto;
    background: var(--card);
    transition: background-color var(--theme-transition);
}

.terminal-body::-webkit-scrollbar { width: 4px; }
.terminal-body::-webkit-scrollbar-track  { background: transparent; }
.terminal-body::-webkit-scrollbar-thumb  { background: var(--border); border-radius: 2px; }
.terminal-body::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.terminal-line {
    margin-bottom: 0.5rem;
    word-wrap: break-word;
    line-height: 1.5;
}

.terminal-muted   { color: var(--muted);  }
.terminal-prompt  { color: var(--accent); margin-right: 0.5rem; }
.terminal-error   { color: #ff5f56; }
.terminal-success { color: #27ca40; }
.terminal-info    { color: var(--accent); }

.terminal-input-line {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem 1rem;
    gap: 0.5rem;
    border-top: 1px solid var(--border);
    transition: border-color var(--theme-transition);
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--fg);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    outline: none;
    caret-color: var(--accent);
    transition: color var(--theme-transition);
}


/* ==========================================================================
   THEME TOGGLE BUTTON
   ========================================================================== */
.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: var(--muted);
    flex-shrink: 0;
}

.theme-toggle:hover {
    color: var(--fg);
}

.theme-toggle-track {
    position: relative;
    width: 52px;
    height: 28px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 100px;
    flex-shrink: 0;
    overflow: visible;
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.theme-toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                background-color 0.35s ease;
    overflow: hidden;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    width: 12px;
    height: 12px;
    color: #ffffff;
    transition: opacity 0.25s ease, transform 0.35s ease;
    pointer-events: none;
}

/* Dark mode state (default) — thumb left, moon visible */
.theme-toggle .icon-sun  { opacity: 0; transform: rotate(90deg) scale(0.5); }
.theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg)  scale(1);   }

.theme-toggle:focus-visible .theme-toggle-track {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 100px;
}


/* ==========================================================================
   REVEAL ANIMATIONS
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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


/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration:  0.01ms !important;
    }

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

    .typing-text {
        animation: none;
        border-right: 2px solid var(--accent);
    }
}


/* ══════════════════════════════════════════════════════════════════════════
   LIGHT MODE OVERRIDES
   ══════════════════════════════════════════════════════════════════════════ */

[data-theme="light"] {
    --bg:           #f0f2f8;
    --bg-secondary: #e4e8f2;
    --fg:           #0a0c14;
    --muted:        #5a6680;
    --accent:       #009e8c;
    --accent-dim:   rgba(0, 158, 140, 0.10);
    --card:         #ffffff;
    --border:       #ced3e3;
    --glow:         rgba(0, 158, 140, 0.28);

    --shadow-sm:    0 2px  8px rgba(10, 12, 40, 0.06);
    --shadow-md:    0 8px 24px rgba(10, 12, 40, 0.10);
    --shadow-lg:    0 16px 48px rgba(10, 12, 40, 0.14);
    --shadow-glow:  0 10px 30px var(--glow);

    --canvas-color: rgba(0, 158, 140, 0.18);

    color-scheme: light;
}

[data-theme="light"] body {
    background: var(--bg);
    color: var(--fg);
}

[data-theme="light"] ::selection {
    background: var(--accent);
    color: #ffffff;
}

[data-theme="light"] ::-webkit-scrollbar-track       { background: var(--bg-secondary); }
[data-theme="light"] ::-webkit-scrollbar-thumb       {
    background: linear-gradient(180deg, var(--border), color-mix(in srgb, var(--border) 60%, var(--accent)));
}
[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: var(--accent); }

[data-theme="light"] #neural-canvas {
    opacity: 0.30;
    mix-blend-mode: multiply;
}

[data-theme="light"] .header.scrolled {
    background: rgba(240, 242, 248, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

[data-theme="light"] .logo { color: var(--fg); }
[data-theme="light"] .nav-link        { color: var(--muted); }
[data-theme="light"] .nav-link:hover,
[data-theme="light"] .nav-link.active { color: var(--fg); }

/* Mobile drawer in light mode */
@media (max-width: 768px) {
    [data-theme="light"] .nav-links {
        background: var(--card);
        border-left: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
    }
}

/* Desktop: always transparent */
@media (min-width: 769px) {
    [data-theme="light"] .nav-links {
        background: transparent;
        border: none;
        box-shadow: none;
    }
}

[data-theme="light"] .mobile-menu-btn span { background: var(--fg); }
[data-theme="light"] .mobile-overlay       { background: rgba(10, 12, 20, 0.4); }

[data-theme="light"] a:focus-visible,
[data-theme="light"] button:focus-visible,
[data-theme="light"] input:focus-visible   { outline-color: var(--accent); }

[data-theme="light"] .btn-primary {
    background: var(--accent);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

[data-theme="light"] .btn-secondary {
    background: var(--card);
    color: var(--fg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
    box-shadow: none;
}

[data-theme="light"] .hero-label {
    background: var(--accent-dim);
    border-color: rgba(0, 158, 140, 0.25);
    color: var(--accent);
}
[data-theme="light"] .hero-label::before { background: var(--accent); }
[data-theme="light"] .name-highlight       { color: var(--accent); }
[data-theme="light"] .name-highlight::after { background: var(--accent); }
[data-theme="light"] .typing-text {
    color: var(--accent);
    border-right-color: var(--accent);
}
[data-theme="light"] .hero-stats { border-top-color: var(--border); }

[data-theme="light"] .about-image-frame {
    border-color: var(--border);
    box-shadow: var(--shadow-md);
}
[data-theme="light"] .about-image-frame:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg);
}
[data-theme="light"] .about-photo {
    filter: grayscale(10%) contrast(1.04) brightness(1.02);
}
[data-theme="light"] .about-image-frame:hover .about-photo {
    filter: grayscale(0%) contrast(1.04) brightness(1.02);
}

[data-theme="light"] .credential-badge {
    background: var(--card);
    border-color: var(--border);
    color: var(--fg);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .credential-badge:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}

[data-theme="light"] .timeline::before { background: var(--border); }
[data-theme="light"] .timeline-dot {
    background: var(--accent);
    border-color: var(--bg);
}
[data-theme="light"] .timeline-item:hover .timeline-dot {
    box-shadow: 0 0 0 4px rgba(0, 158, 140, 0.22),
                0 0 0 8px rgba(0, 158, 140, 0.08);
}

[data-theme="light"] .timeline-card {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .timeline-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}
[data-theme="light"] .timeline-date    { color: var(--accent); }
[data-theme="light"] .timeline-company { color: var(--muted);  }
[data-theme="light"] .timeline-desc    { color: var(--muted);  }
[data-theme="light"] .tag {
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid rgba(0, 158, 140, 0.2);
}

[data-theme="light"] .skill-category-btn {
    background: var(--card);
    border-color: var(--border);
    color: var(--muted);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .skill-category-btn:hover,
[data-theme="light"] .skill-category-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
    box-shadow: none;
}

[data-theme="light"] .skill-card {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .skill-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md), 0 0 20px rgba(0, 158, 140, 0.10);
}
/* Light-mode three-stop gradient — same feel, correct accent hue. */
[data-theme="light"] .skill-level-fill {
    background: linear-gradient(90deg, var(--accent), #00b89e 50%, #00c4a0);
}

[data-theme="light"] .project-card {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .project-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-lg), 0 0 24px rgba(0, 158, 140, 0.12);
}
[data-theme="light"] .project-image {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg));
}
[data-theme="light"] .project-image-pattern { opacity: 0.07; }
[data-theme="light"] .project-logo {
    background: var(--accent-dim);
    border-color: rgba(0, 158, 140, 0.25);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}

[data-theme="light"] .contact-card {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-md);
}
[data-theme="light"] .contact-link {
    background: var(--bg);
    border-color: var(--border);
    color: var(--fg);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .contact-link:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
    box-shadow: var(--shadow-md);
}

[data-theme="light"] .footer-social a {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .footer-social a:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-dim);
}

[data-theme="light"] .terminal-btn {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}
[data-theme="light"] .terminal-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow-md);
}
[data-theme="light"] .terminal-modal {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-lg);
}
[data-theme="light"] .terminal-header {
    background: var(--bg-secondary);
    border-bottom-color: var(--border);
}
[data-theme="light"] .terminal-body { background: var(--card); }
[data-theme="light"] .terminal-body::-webkit-scrollbar-thumb {
    background: var(--border);
}
[data-theme="light"] .terminal-body::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}
[data-theme="light"] .terminal-error   { color: #c0392b; }
[data-theme="light"] .terminal-success { color: #27ae60; }
[data-theme="light"] .terminal-info    { color: var(--accent); }

/* Light theme toggle */
[data-theme="light"] .theme-toggle-thumb { transform: translateX(24px); }
[data-theme="light"] .theme-toggle-track {
    background: #e4e8f2;
    border-color: #ced3e3;
}
[data-theme="light"] .theme-toggle .icon-sun  {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}
[data-theme="light"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}


/* ── System-preference fallback (no JS / no data-theme) ── */
@media (prefers-color-scheme: light) {
    html:not([data-theme]) {
        --bg:           #f0f2f8;
        --bg-secondary: #e4e8f2;
        --fg:           #0a0c14;
        --muted:        #5a6680;
        --accent:       #009e8c;
        --accent-dim:   rgba(0, 158, 140, 0.10);
        --card:         #ffffff;
        --border:       #ced3e3;
        --glow:         rgba(0, 158, 140, 0.28);
        --shadow-sm:    0 2px  8px rgba(10, 12, 40, 0.06);
        --shadow-md:    0 8px 24px rgba(10, 12, 40, 0.10);
        --shadow-lg:    0 16px 48px rgba(10, 12, 40, 0.14);
        --shadow-glow:  0 10px 30px var(--glow);
        --canvas-color: rgba(0, 158, 140, 0.18);
        color-scheme: light;
    }
}