/* ══════════════════════════════════════════════════════
   DeepMatch AI — The Forensic Sentinel Design System
   aideepmatch.com
   ══════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ── */
:root {
    /* Surfaces */
    --surface: #121414;
    --surface-dim: #0d0f0f;
    --surface-container-low: #1a1c1c;
    --surface-container: #1e2020;
    --surface-container-high: #282a2b;
    --surface-container-highest: #333535;

    /* Primary */
    --primary: #b9c7e4;
    --primary-container: #0a192f;
    --on-primary: #233148;

    /* Secondary (Cyan Accent — AI) */
    --secondary: #ddfcff;
    --secondary-fixed: #74f5ff;
    --secondary-fixed-dim: #00dbe7;
    --secondary-container: #00f1fe;
    --on-secondary-fixed: #002022;

    /* Tertiary (Purple — Blockchain) */
    --tertiary: #d1bcff;
    --tertiary-container: #200055;

    /* Text */
    --on-surface: #e2e2e2;
    --on-surface-variant: #c5c6cd;

    /* Outline */
    --outline: #8f9097;
    --outline-variant: #44474d;

    /* Error */
    --error: #ffb4ab;
    --error-container: #93000a;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Typography */
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --tracking-tight: -0.022em;
    --tracking-wide: 0.2em;

    /* Radius */
    --radius-sm: 0.125rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;

    /* Max width */
    --max-w: 1280px;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: var(--font);
    background: var(--surface);
    color: var(--on-surface);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
::selection { background: rgba(0, 241, 254, 0.2); color: #fff; }

/* ── UTILITY ── */
.section-tag {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--secondary-fixed);
    margin-bottom: var(--space-md);
}
.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: var(--tracking-tight);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}
.section-subtitle {
    font-size: 1.1rem;
    color: var(--on-surface-variant);
    max-width: 600px;
    line-height: 1.7;
}

/* ── BUTTONS ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.9rem 2rem;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: var(--tracking-tight);
    border: none;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-md);
}
.btn--primary {
    background: var(--secondary-fixed-dim);
    color: var(--on-secondary-fixed);
    box-shadow: 0 0 40px rgba(0, 219, 231, 0.15);
}
.btn--primary:hover {
    filter: brightness(1.15);
    box-shadow: 0 0 60px rgba(0, 219, 231, 0.25);
    transform: translateY(-1px);
}
.btn--ghost {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(68, 71, 77, 0.4);
}
.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(68, 71, 77, 0.7);
}
.btn--white {
    background: #fff;
    color: var(--surface);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.75rem;
}
.btn--white:hover {
    background: var(--secondary-fixed);
    box-shadow: 0 0 50px rgba(255, 255, 255, 0.1);
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ══════════════════════════════════════════════════════
   HEADER
   ══════════════════════════════════════════════════════ */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(18, 20, 20, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(68, 71, 77, 0.15);
    box-shadow: 0 4px 40px rgba(185, 199, 228, 0.04);
}
.header__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}
.header__logo {
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: var(--tracking-tight);
}
.header__nav {
    display: flex;
    gap: 2rem;
}
.header__link {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--on-surface-variant);
    transition: color 0.2s;
    position: relative;
}
.header__link:hover, .header__link.active {
    color: var(--secondary-container);
}
.header__link.active::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0; right: 0;
    height: 2px;
    background: var(--secondary-container);
}
.header__actions { display: flex; align-items: center; gap: 1rem; }

/* Language Toggle */
.lang-toggle {
    display: flex;
    background: var(--surface-container-highest);
    border-radius: 100px;
    padding: 2px;
}
.lang-btn {
    padding: 0.3rem 0.7rem;
    font-family: var(--font);
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background: none;
    border: none;
    color: var(--on-surface-variant);
    cursor: pointer;
    border-radius: 100px;
    transition: all 0.2s;
}
.lang-btn.active {
    background: rgba(0, 241, 254, 0.1);
    color: var(--secondary-container);
}
.lang-btn:hover { color: #fff; }

/* Hamburger */
.header__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.header__hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--on-surface);
    transition: all 0.3s;
}

/* ══════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    overflow: hidden;
}
.hero__grid-overlay {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
}
.hero__content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}
.hero__status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: var(--surface-container-low);
    border: 1px solid rgba(68, 71, 77, 0.2);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
}
.status-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--secondary-fixed);
    box-shadow: 0 0 8px var(--secondary-fixed);
    animation: pulse-glow 2s infinite;
}
.status-text {
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--secondary-fixed);
}
.hero__title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: var(--tracking-tight);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}
.hero__gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary-fixed), var(--tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero__subtitle {
    font-size: 1.15rem;
    color: var(--on-surface-variant);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}
.hero__cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.hero__stats {
    position: relative;
    z-index: 1;
    margin-top: 5rem;
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
    justify-content: center;
}
.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}
.stat__value {
    font-size: 2rem;
    font-weight: 900;
    color: #fff;
    letter-spacing: var(--tracking-tight);
}
.stat__unit {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--on-surface-variant);
}
.stat__label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--on-surface-variant);
}
.stat__icon {
    font-size: 1.5rem;
    color: var(--tertiary);
}
.stat__value--text {
    font-size: 1rem;
    color: var(--tertiary);
    letter-spacing: 0.05em;
}
.stat--blockchain { color: var(--tertiary); }

/* ══════════════════════════════════════════════════════
   COMPARISON
   ══════════════════════════════════════════════════════ */
.comparison {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--surface-container-low);
    border-top: 1px solid rgba(68, 71, 77, 0.15);
    border-bottom: 1px solid rgba(68, 71, 77, 0.15);
}
.comparison__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}
.comparison__card {
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(68, 71, 77, 0.15);
}
.comparison__card--old {
    background: var(--surface);
}
.comparison__card--new {
    background: linear-gradient(135deg, rgba(0, 241, 254, 0.03), rgba(209, 188, 255, 0.03));
    border-color: rgba(0, 241, 254, 0.1);
}
.comparison__tag {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}
.comparison__tag--warn {
    background: rgba(255, 180, 171, 0.1);
    color: var(--error);
}
.comparison__tag--good {
    background: rgba(0, 219, 231, 0.1);
    color: var(--secondary-fixed-dim);
}
.comparison__title {
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 2rem;
    letter-spacing: var(--tracking-tight);
}
.comparison__list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.comparison__list li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}
.comparison__list strong {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.25rem;
}
.comparison__list p {
    font-size: 0.85rem;
    color: var(--on-surface-variant);
    line-height: 1.6;
}
.comparison__icon--bad {
    color: var(--error);
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.comparison__icon--good {
    color: var(--secondary-fixed-dim);
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

/* ══════════════════════════════════════════════════════
   CAPABILITIES
   ══════════════════════════════════════════════════════ */
.capabilities {
    padding: var(--space-5xl) var(--space-xl);
}
.capabilities__inner {
    max-width: var(--max-w);
    margin: 0 auto;
}
.capabilities__header {
    margin-bottom: var(--space-4xl);
}
.capabilities__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.cap-card {
    padding: 2rem;
    background: var(--surface-container-low);
    border: 1px solid rgba(68, 71, 77, 0.1);
    border-radius: var(--radius-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.cap-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 2px; height: 100%;
    background: var(--tertiary);
    opacity: 0;
    transition: opacity 0.3s;
}
.cap-card:hover {
    background: var(--surface-container-high);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.cap-card:hover::before { opacity: 1; }
.cap-card__icon {
    font-size: 2.5rem;
    color: var(--secondary-fixed-dim);
    margin-bottom: 1.5rem;
    display: block;
}
.cap-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.75rem;
}
.cap-card__desc {
    font-size: 0.8rem;
    color: var(--on-surface-variant);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}
.cap-card__module {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--outline);
}

/* ══════════════════════════════════════════════════════
   DEMO TERMINAL
   ══════════════════════════════════════════════════════ */
.demo {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--surface-container-low);
    border-top: 1px solid rgba(68, 71, 77, 0.15);
}
.demo__inner {
    max-width: 900px;
    margin: 0 auto;
}
.demo__header {
    margin-bottom: var(--space-3xl);
}
.terminal {
    background: var(--surface-dim);
    border: 1px solid rgba(68, 71, 77, 0.2);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.4);
}
.terminal__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    background: var(--surface-container);
    border-bottom: 1px solid rgba(68, 71, 77, 0.15);
}
.terminal__dots { display: flex; gap: 6px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot--red { background: #ff5f56; }
.dot--yellow { background: #ffbd2e; }
.dot--green { background: #27c93f; }
.terminal__title {
    font-size: 0.7rem;
    color: var(--on-surface-variant);
    font-weight: 500;
}
.terminal__status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--on-surface-variant);
}
.status-dot--idle { background: var(--outline); box-shadow: none; }
.status-dot--running {
    background: var(--secondary-fixed);
    box-shadow: 0 0 8px var(--secondary-fixed);
    animation: pulse-glow 1s infinite;
}
.status-dot--done { background: #27c93f; box-shadow: 0 0 8px #27c93f; }
.status-dot--error { background: #ff5f56; box-shadow: 0 0 8px #ff5f56; }
.terminal__body { padding: 1.5rem; }
.terminal__form {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(68, 71, 77, 0.15);
}
.input-group {
    margin-bottom: 1rem;
}
.input-group label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--on-surface-variant);
    margin-bottom: 0.4rem;
}
.terminal__input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--surface-container-low);
    border: none;
    border-bottom: 2px solid var(--outline-variant);
    color: var(--on-surface);
    font-family: var(--font);
    font-size: 0.85rem;
    transition: all 0.3s;
    outline: none;
}
.terminal__input:focus {
    border-color: var(--secondary-fixed-dim);
    box-shadow: 0 2px 12px rgba(0, 219, 231, 0.1);
}
.terminal__input::placeholder { color: var(--outline); }
.terminal__actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}
.terminal__output {
    max-height: 300px;
    overflow-y: auto;
    font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
    font-size: 0.8rem;
    line-height: 1.8;
}
.terminal__line {
    display: flex;
    gap: 0.5rem;
    padding: 0.15rem 0;
    animation: fadeInLine 0.3s ease;
}
.terminal__prompt { color: var(--secondary-fixed-dim); font-weight: 700; }
.terminal__line--system { color: var(--on-surface-variant); }
.terminal__line--info { color: var(--secondary-fixed); }
.terminal__line--success { color: #27c93f; }
.terminal__line--error { color: var(--error); }
.terminal__line--result { color: var(--tertiary); }

/* ══════════════════════════════════════════════════════
   CTA
   ══════════════════════════════════════════════════════ */
.cta {
    padding: var(--space-5xl) var(--space-xl);
    position: relative;
}
.cta__inner {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    background: rgba(0, 241, 254, 0.03);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 241, 254, 0.1);
    border-radius: var(--radius-2xl);
    padding: var(--space-4xl) var(--space-3xl);
    position: relative;
}
.cta__icon-wrap {
    position: absolute;
    top: -2.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 5rem; height: 5rem;
    background: var(--surface);
    border: 1px solid rgba(0, 241, 254, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cta__icon {
    font-size: 2.5rem;
    color: var(--secondary-fixed-dim);
}
.cta__title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: var(--tracking-tight);
    margin-bottom: 2rem;
    line-height: 1.2;
}
.cta__buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ══════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════ */
.footer {
    background: var(--surface);
    border-top: 1px solid rgba(68, 71, 77, 0.15);
    padding: 3rem 2rem;
}
.footer__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    opacity: 0.6;
}
.footer__copy {
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--on-surface-variant);
}
.footer__links {
    display: flex;
    gap: 2rem;
}
.footer__links a {
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--on-surface-variant);
    transition: color 0.2s;
}
.footer__links a:hover { color: var(--secondary-container); }

/* ══════════════════════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════════════════════ */
@keyframes pulse-glow {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
@keyframes fadeInLine {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.cap-card, .comparison__card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.cap-card.visible, .comparison__card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ══════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
    .capabilities__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .header__nav { display: none; }
    .header__hamburger { display: flex; }
    .header__nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--surface);
        padding: 1.5rem 2rem;
        border-bottom: 1px solid rgba(68, 71, 77, 0.15);
        gap: 1rem;
    }
    .hero__title { font-size: 2.2rem; }
    .hero__stats { gap: 1.5rem; }
    .comparison__inner { grid-template-columns: 1fr; }
    .capabilities__grid { grid-template-columns: 1fr; }
    .terminal__actions { flex-direction: column; }
    .footer__inner { flex-direction: column; gap: 1.5rem; text-align: center; }
    .cta__inner { padding: 3rem 1.5rem; }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--outline-variant); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--outline); }