/* ══════════════════════════════════════════════
   DESIGN TOKENS — Terminal Dark Theme
   ══════════════════════════════════════════════ */
:root {
    --bg: #0A0A0A;
    --bg-surface: #0c160a;
    --bg-card: #121212;
    --bg-card-hover: #182216;
    --bg-input: #141e12;
    --border: #2A2A2A;
    --border-glow: #00FF4130;
    --green: #00FF41;
    --green-dim: #00e639;
    --green-muted: #84967e;
    --cyan: #03DAC6;
    --purple: #BB86FC;
    --text: #dae6d2;
    --text-dim: #b9ccb2;
    --text-muted: #84967e;
    --red: #FF3B30;
    --yellow: #FFD60A;
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Space Grotesk', monospace;
    --radius: 8px;
    --radius-sm: 4px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* hardcoded color tokens (overridden in light) */
    --heading: #ebffe2;
    --nav-bg: rgba(10, 10, 10, 0.75);
    --nav-bg-scroll: rgba(10, 10, 10, 0.92);
    --nav-mobile-bg: rgba(10, 10, 10, 0.95);
    --terminal-header-bg: rgba(255, 255, 255, 0.02);
    --hero-shadow: 0 0 60px rgba(0, 255, 65, 0.04), 0 20px 60px rgba(0, 0, 0, 0.4);
    --tag-bg: rgba(0, 255, 65, 0.06);
    --tag-border: rgba(0, 255, 65, 0.15);
    --hover-glow: rgba(0, 255, 65, 0.06);
    --hover-border: rgba(0, 255, 65, 0.3);
    --pill-bg: rgba(255, 255, 255, 0.04);
    --active-bg: rgba(0, 255, 65, 0.06);
    --btn-outline-hover-bg: rgba(0, 255, 65, 0.04);
    --btn-primary-text: #003907;
    --badge-grad-bg: rgba(187, 134, 252, 0.12);
    --badge-grad-border: rgba(187, 134, 252, 0.25);
    --badge-free-bg: rgba(3, 218, 198, 0.1);
    --badge-free-border: rgba(3, 218, 198, 0.25);
    --badge-personal-bg: rgba(0, 255, 65, 0.08);
    --badge-personal-border: rgba(0, 255, 65, 0.2);
    --focus-ring: rgba(0, 255, 65, 0.08);
    --glow-text-shadow: 0 0 10px rgba(0, 255, 65, 0.3);
    --btn-glow-shadow: 0 0 30px rgba(0, 255, 65, 0.25);
    --timeline-dot-shadow: 0 0 10px rgba(0, 255, 65, 0.4);
    --status-dot-shadow: 0 0 8px rgba(0, 255, 65, 0.6);
    --grid-line-color: rgba(0, 255, 65, 0.03);
}

/* ══════════════════════════════════════════════
   LIGHT MODE TOKENS
   ══════════════════════════════════════════════ */
[data-theme="light"] {
    --bg: #F5F7F3;
    --bg-surface: #EFF3EC;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F0F5ED;
    --bg-input: #F7FAF5;
    --border: #D6DDD2;
    --border-glow: #00993020;
    --green: #008A25;
    --green-dim: #007A20;
    --green-muted: #6B8564;
    --cyan: #027E72;
    --purple: #7B40C9;
    --text: #1A2B14;
    --text-dim: #3A4D33;
    --text-muted: #6B8564;
    --red: #D6291F;
    --yellow: #C4A508;

    --heading: #0D1A08;
    --nav-bg: rgba(245, 247, 243, 0.8);
    --nav-bg-scroll: rgba(245, 247, 243, 0.95);
    --nav-mobile-bg: rgba(245, 247, 243, 0.97);
    --terminal-header-bg: rgba(0, 0, 0, 0.02);
    --hero-shadow: 0 4px 40px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);
    --tag-bg: rgba(0, 138, 37, 0.06);
    --tag-border: rgba(0, 138, 37, 0.18);
    --hover-glow: rgba(0, 138, 37, 0.05);
    --hover-border: rgba(0, 138, 37, 0.35);
    --pill-bg: rgba(0, 0, 0, 0.03);
    --active-bg: rgba(0, 138, 37, 0.06);
    --btn-outline-hover-bg: rgba(0, 138, 37, 0.05);
    --btn-primary-text: #FFFFFF;
    --badge-grad-bg: rgba(123, 64, 201, 0.08);
    --badge-grad-border: rgba(123, 64, 201, 0.2);
    --badge-free-bg: rgba(2, 126, 114, 0.08);
    --badge-free-border: rgba(2, 126, 114, 0.2);
    --badge-personal-bg: rgba(0, 138, 37, 0.06);
    --badge-personal-border: rgba(0, 138, 37, 0.18);
    --focus-ring: rgba(0, 138, 37, 0.12);
    --glow-text-shadow: none;
    --btn-glow-shadow: 0 4px 16px rgba(0, 138, 37, 0.2);
    --timeline-dot-shadow: 0 0 6px rgba(0, 138, 37, 0.3);
    --status-dot-shadow: 0 0 6px rgba(0, 138, 37, 0.4);
    --grid-line-color: rgba(0, 138, 37, 0.04);
}

/* ══════════════════════════════════════════════
   RESET & BASE
   ══════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; font-size: 16px; }
body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--green); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--cyan); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
strong { color: var(--green); font-weight: 600; }

/* ══════════════════════════════════════════════
   UTILITIES
   ══════════════════════════════════════════════ */
.blink { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.terminal-prompt {
    color: var(--green);
    font-family: var(--font-mono);
    font-weight: 600;
    margin-right: 0.5rem;
}
.terminal-cmd {
    color: var(--text);
    font-family: var(--font-mono);
}
.terminal-line {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

/* ══════════════════════════════════════════════
   NAVIGATION
   ══════════════════════════════════════════════ */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}
.nav__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.nav__brand {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--green) !important;
    letter-spacing: 0.05em;
}
.nav__brand-prompt { color: var(--text-muted); margin-right: 0.25rem; }
.nav__links { display: flex; gap: 0.5rem; }
.nav__link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted) !important;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    letter-spacing: 0.03em;
}
.nav__link:hover, .nav__link.active {
    color: var(--green) !important;
    background: var(--active-bg);
}
.nav__actions { display: flex; align-items: center; gap: 0.25rem; }
.nav__toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: var(--green); border-radius: 2px; transition: var(--transition); }

/* ══════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 6rem 2rem 4rem;
}
.hero__bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--grid-line-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line-color) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 100%);
}
.hero__container { max-width: 860px; text-align: center; position: relative; z-index: 1; }
.hero__terminal-window {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--hero-shadow);
}
.hero__terminal-body {
    padding: 2.5rem 2.5rem 2rem;
}
.hero__terminal-line {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    background: var(--bg);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.hero__name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--heading);
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 0.5rem;
}
.hero__role {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 500;
    color: var(--green);
    margin-bottom: 1.5rem;
}
.hero__role-prompt { color: var(--text-muted); margin-right: 0.5rem; }
.hero__desc {
    font-size: 1.05rem;
    color: var(--text-dim);
    line-height: 1.7;
    max-width: 650px;
    margin: 0 auto 2rem;
}
.hero__tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; margin-bottom: 2.5rem; }
.tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--green);
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius);
    letter-spacing: 0.05em;
}
.hero__cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
.hero__scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: float 2s ease-in-out infinite;
    color: var(--text-muted);
}
@keyframes float { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* ══════════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════════ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-transform: uppercase;
}
.btn .material-icons-outlined { font-size: 1.1rem; }
.btn--primary {
    background: var(--green);
    color: var(--btn-primary-text);
}
.btn--primary:hover {
    background: var(--green-dim);
    color: var(--btn-primary-text);
    box-shadow: var(--btn-glow-shadow);
    transform: translateY(-2px);
}
.btn--outline {
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border);
}
.btn--outline:hover {
    border-color: var(--green);
    color: var(--green);
    background: var(--btn-outline-hover-bg);
}
.btn--submit { width: 100%; justify-content: center; margin-top: 0.5rem; }

/* ══════════════════════════════════════════════
   SECTIONS
   ══════════════════════════════════════════════ */
.section { padding: 6rem 2rem; position: relative; }
.section__container { max-width: 1200px; margin: 0 auto; }
.section__header { margin-bottom: 3rem; }
.section__subtitle { color: var(--text-muted); font-size: 1rem; max-width: 600px; line-height: 1.6; }

/* ══════════════════════════════════════════════
   PROJECTS
   ══════════════════════════════════════════════ */
.projects { background: var(--bg); }
.projects__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.project-card:hover {
    border-color: var(--hover-border);
    box-shadow: 0 0 40px var(--hover-glow);
    transform: translateY(-4px);
}
.project-card__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.project-card__dots { display: flex; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot--red { background: var(--red); }
.dot--yellow { background: var(--yellow); }
.dot--green { background: var(--green); }
.badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.badge--grad { background: var(--badge-grad-bg); color: var(--purple); border: 1px solid var(--badge-grad-border); }
.badge--freelance { background: var(--badge-free-bg); color: var(--cyan); border: 1px solid var(--badge-free-border); }
.badge--personal { background: var(--badge-personal-bg); color: var(--green); border: 1px solid var(--badge-personal-border); }
.project-card__title {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 0.25rem;
}
.project-card__subtitle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--green);
    letter-spacing: 0.03em;
    margin-bottom: 0.75rem;
}
.project-card__desc { color: var(--text-dim); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1.25rem; flex: 1; }
.project-card__tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.25rem; }
.tech-pill {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--pill-bg);
    border: 1px solid var(--border);
    padding: 0.2rem 0.55rem;
    border-radius: var(--radius-sm);
}
.project-card__actions { border-top: 1px solid var(--border); padding-top: 1rem; }
.project-card__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--green) !important;
    transition: all var(--transition);
}
.project-card__link:hover { color: var(--cyan) !important; text-shadow: var(--glow-text-shadow); }
.project-card__link .material-icons-outlined { font-size: 1rem; }

/* ══════════════════════════════════════════════
   STACK SECTION
   ══════════════════════════════════════════════ */
.stack { background: var(--bg-surface); }
.stack__layout { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.stack__section-title {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--green);
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
}
.stack__category { margin-bottom: 1.5rem; }
.stack__category-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--text);
}
.stack__category-header .material-icons-outlined { color: var(--green); font-size: 1.2rem; }
.stack__category-header h4 { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; }
.stack__items { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.stack-pill {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius);
    transition: all var(--transition);
}
.stack-pill:hover { border-color: var(--hover-border); color: var(--green); }
.stack-pill--sm { font-size: 0.72rem; padding: 0.3rem 0.65rem; }
.btn--download { margin-top: 1rem; }

/* Timeline */
.timeline { position: relative; padding-left: 1.5rem; border-left: 2px solid var(--border); }
.timeline__item { margin-bottom: 2rem; position: relative; }
.timeline__item::before {
    content: '';
    position: absolute;
    left: -1.85rem;
    top: 0.5rem;
    width: 10px; height: 10px;
    border-radius: 50%;
    background: var(--green);
    border: 2px solid var(--bg-surface);
    box-shadow: var(--timeline-dot-shadow);
}
.timeline__header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.25rem; }
.timeline__title { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--heading); }
.timeline__date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--green); }
.timeline__location { font-size: 0.82rem; color: var(--text-muted); display: block; margin-bottom: 0.5rem; }
.timeline__list { padding-left: 1rem; }
.timeline__list li {
    position: relative;
    padding-left: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.88rem;
    color: var(--text-dim);
    line-height: 1.6;
}
.timeline__list li::before { content: '▸'; position: absolute; left: 0; color: var(--green); }

/* Education */
.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}
.education-card__header {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}
.education-card__header .material-icons-outlined { color: var(--green); font-size: 1.4rem; margin-top: 2px; }
.education-card__header h4 { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--heading); }
.education-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.75rem; }
.education-card__courses { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ══════════════════════════════════════════════
   CONTACT SECTION
   ══════════════════════════════════════════════ */
.contact { background: var(--bg); }
.contact__layout { display: grid; grid-template-columns: 1fr; max-width: 600px; margin: 0 auto; gap: 2.5rem; }

.terminal-window { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.terminal-window__header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.25rem;
    background: var(--terminal-header-bg);
    border-bottom: 1px solid var(--border);
}
.terminal-window__dots { display: flex; gap: 6px; }
.terminal-window__title { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); }



.contact__channels-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--green);
    margin-bottom: 1.25rem;
}
.channel-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    transition: all var(--transition);
    color: var(--text) !important;
}
.channel-card:hover {
    border-color: var(--hover-border);
    background: var(--bg-card-hover);
    transform: translateX(4px);
}
.channel-card__icon { color: var(--green); font-size: 1.5rem; }
.channel-card__protocol { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.05em; text-transform: uppercase; display: block; }
.channel-card__value { font-size: 0.88rem; color: var(--text-dim); display: block; margin-top: 0.15rem; }

/* ══════════════════════════════════════════════
   STATUS BAR / FOOTER
   ══════════════════════════════════════════════ */
.status-bar {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 0.75rem 2rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
}
.status-bar__container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.status-bar__left, .status-bar__right { display: flex; align-items: center; gap: 1.5rem; }
.status-bar__item { color: var(--text-muted); letter-spacing: 0.05em; display: flex; align-items: center; gap: 0.5rem; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; }
.status-dot--green { background: var(--green); box-shadow: var(--status-dot-shadow); }
.status-bar__link { color: var(--text-muted) !important; transition: color var(--transition); }
.status-bar__link:hover { color: var(--green) !important; }

/* ══════════════════════════════════════════════
   SCROLL REVEAL ANIMATIONS
   ══════════════════════════════════════════════ */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ══════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════ */
@media (max-width: 900px) {
    .projects__grid { grid-template-columns: 1fr; }
    .stack__layout { grid-template-columns: 1fr; }
    .contact__layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav__links {
        display: none;
        position: absolute;
        top: 64px; left: 0; right: 0;
        background: var(--nav-mobile-bg);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border);
    }
    .nav__links.open { display: flex; }
    .nav__toggle { display: flex; }
    .hero { padding: 5rem 1.25rem 3rem; }
    .hero__name { font-size: 2.2rem; }
    .section { padding: 4rem 1.25rem; }
    .status-bar__container { flex-direction: column; text-align: center; }
    .status-bar__left, .status-bar__right { justify-content: center; }
}

/* ══════════════════════════════════════════════
   THEME TOGGLE
   ══════════════════════════════════════════════ */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    transition: all var(--transition);
    margin-left: 0.5rem;
}
.theme-toggle:hover {
    border-color: var(--green);
    color: var(--green);
    background: var(--active-bg);
}
.theme-toggle .material-icons-outlined { font-size: 1.15rem; }

/* smooth color transitions on theme switch */
body,
.nav,
.project-card,
.terminal-window,
.education-card,
.channel-card,
.stack-pill,
.tag,
.btn,
.status-bar,
.hero__terminal-line {
    transition:
        background-color 0.4s ease,
        color 0.4s ease,
        border-color 0.4s ease,
        box-shadow 0.4s ease;
}