/* ═══════════════════════════════════════════════════════════════
   GiraffeAI — Light theme (default)
   Full stylesheet. The dark theme (css/dark.css) only overrides
   the CSS custom properties defined in :root below.
   ═══════════════════════════════════════════════════════════════ */

:root {
    /* surfaces */
    --bg: #f6f7fb;
    --bg-soft: #eef0f7;
    --card: rgba(255, 255, 255, 0.86);
    --card-solid: #ffffff;
    --footer-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.82);
    --nav-bg-solid: rgba(255, 255, 255, 0.96);
    --nav-mobile-bg: rgba(255, 255, 255, 0.98);
    --line: rgba(12, 18, 30, 0.09);
    --text: #182230;
    --text-strong: #0c1420;
    --dim: #5b6572;
    --blockquote: #3c4856;
    --ghost-bg: rgba(12, 18, 30, 0.045);
    --ghost-border: rgba(12, 18, 30, 0.16);

    /* accents: --accent/gold/green = vivid fills & glows,
       --*-ink = same hue, readable as text on the background */
    --accent: #00d6c8;
    --accent-ink: #007c74;
    --accent-dim: rgba(0, 214, 200, 0.12);
    --accent-border: rgba(0, 214, 200, 0.35);
    --violet: #7c3aed;
    --violet-dim: rgba(124, 58, 237, 0.12);
    --violet-border: rgba(124, 58, 237, 0.3);
    --gold: #e8a400;
    --gold-ink: #9a6b00;
    --gold-dim: rgba(232, 164, 0, 0.12);
    --gold-border: rgba(232, 164, 0, 0.35);
    --green: #00b886;
    --green-ink: #007a5a;
    --green-border: rgba(0, 184, 134, 0.35);
    --red: #ff5f6d;

    /* gradients */
    --grad1: #0d1520;
    --grad2: #40526b;
    --grad3: var(--accent-ink);
    --gg1: var(--accent-ink);
    --gg2: #2aa8c9;
    --gg3: #c98800;

    /* misc */
    --selection-bg: rgba(0, 124, 116, 0.18);
    --selection-color: #0c1420;
    --scroll-track: #e7eaf1;
    --link-hover: var(--text-strong);
    --particles-opacity: 0.65;

    /* terminal + chips (used on both themes, light-tuned values) */
    --term-bg: #ffffff;
    --term-head-bg: #f2f4fa;
    --term-text: #33404f;
    --term-track: rgba(12, 18, 30, 0.08);
    --chip-bg: rgba(255, 255, 255, 0.95);
    --chip-c1: #007c74;
    --chip-c2: #a97b00;
    --chip-c3: #7c3aed;
    --chip-c4: #007a5a;
    --chip-c5: #d4556a;

    /* shadows */
    --shadow: 0 18px 50px rgba(20, 30, 50, 0.14);
    --panel-shadow: 0 24px 60px rgba(20, 30, 50, 0.18), 0 0 70px rgba(0, 214, 200, 0.05);
    --card-glow: 0 18px 44px rgba(15, 25, 45, 0.16), 0 0 40px rgba(0, 214, 200, 0.1);
    --chip-shadow: 0 8px 20px rgba(15, 25, 45, 0.18);

    /* layout */
    --nav-h: 78px;
    --radius: 18px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent), var(--violet));
    border-radius: 8px;
}

h1,
h2,
h3 {
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.12;
}

a {
    text-decoration: none;
    color: inherit;
}

section {
    position: relative;
    scroll-margin-top: calc(var(--nav-h) + 14px);
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 5%;
    position: relative;
    z-index: 2;
}

.grad-text {
    background: linear-gradient(120deg, var(--grad1) 0%, var(--grad2) 40%, var(--grad3) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.grad-gold {
    background: linear-gradient(120deg, var(--gg1), var(--gg2) 45%, var(--gg3));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ─────────────────────────── nav ─────────────────────────── */
nav {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    transition: background 0.35s ease, box-shadow 0.35s ease;
}

nav.scrolled {
    background: var(--nav-bg-solid);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.logo {
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo .mark {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--violet));
    box-shadow: 0 0 24px rgba(0, 214, 200, 0.4);
}

.logo .mark svg {
    width: 20px;
    height: 20px;
    color: #000;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--dim);
    position: relative;
    transition: color 0.25s;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    height: 2px;
    width: 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--gold));
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--link-hover);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 22px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.88rem;
    color: #000;
    background: linear-gradient(120deg, var(--accent), #5fd4ff);
    box-shadow: 0 0 20px rgba(0, 214, 200, 0.35);
    transition: transform 0.25s, box-shadow 0.25s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 214, 200, 0.5);
}

/* theme toggle */
.nav-li-theme {
    display: flex;
    align-items: center;
}

.theme-toggle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--accent-border);
    background: var(--accent-dim);
    color: var(--accent-ink);
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s, background 0.25s;
}

.theme-toggle:hover {
    transform: translateY(-2px) rotate(10deg);
    border-color: var(--accent-ink);
    box-shadow: 0 8px 24px rgba(15, 25, 45, 0.18);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .icon-sun {
    display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--accent-border);
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.05);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--accent-ink);
    border-radius: 999px;
    transition: transform 0.25s, opacity 0.25s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ─────────────────────────── hero ─────────────────────────── */
#particles-js {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    opacity: var(--particles-opacity);
    pointer-events: none;
}

#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-h) + 40px) 0 60px;
    position: relative;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
    z-index: 0;
    animation: orbFloat 16s ease-in-out infinite alternate;
}

.orb-1 {
    width: 460px;
    height: 460px;
    top: -120px;
    left: -140px;
    background: radial-gradient(circle, rgba(0, 214, 200, 0.4), transparent 65%);
}

.orb-2 {
    width: 420px;
    height: 420px;
    bottom: -140px;
    right: -120px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.4), transparent 65%);
    animation-delay: -6s;
}

.orb-3 {
    width: 260px;
    height: 260px;
    top: 30%;
    left: 55%;
    background: radial-gradient(circle, rgba(232, 164, 0, 0.3), transparent 65%);
    animation-delay: -10s;
}

@keyframes orbFloat {
    from {
        transform: translate3d(0, 0, 0) scale(1);
    }
    to {
        transform: translate3d(40px, 30px, 0) scale(1.12);
    }
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    background: var(--accent-dim);
    color: var(--accent-ink);
    border: 1px solid var(--accent-border);
    border-radius: 100px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1.6rem;
    animation: fadeUp 0.8s ease both;
}

.badge .pulse {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 0 rgba(0, 184, 134, 0.6);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 184, 134, 0.55);
    }
    70% {
        box-shadow: 0 0 0 9px rgba(0, 184, 134, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 184, 134, 0);
    }
}

.hero h1 {
    font-size: clamp(2.4rem, 5.6vw, 4.3rem);
    margin-bottom: 1.3rem;
    animation: fadeUp 0.9s 0.08s ease both;
}

.hero .type-line {
    font-size: 1.18rem;
    color: var(--dim);
    min-height: 2.2em;
    margin-bottom: 2rem;
    font-weight: 300;
    animation: fadeUp 1s 0.16s ease both;
}

.type-line .caret {
    display: inline-block;
    width: 2px;
    height: 1.05em;
    background: var(--accent);
    margin-left: 4px;
    vertical-align: text-bottom;
    animation: blink 0.9s steps(1) infinite;
    box-shadow: 0 0 8px rgba(0, 214, 200, 0.8);
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.hero-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 1.1rem;
    animation: fadeUp 1.1s 0.24s ease both;
}

.btn {
    padding: 15px 30px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.98rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 9px;
    transition: transform 0.25s, box-shadow 0.25s, background 0.25s, border-color 0.25s;
}

.btn.primary {
    background: linear-gradient(120deg, var(--accent), #5fd4ff);
    color: #000;
    box-shadow: 0 10px 30px rgba(0, 214, 200, 0.3);
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 44px rgba(0, 214, 200, 0.45);
}

.btn.ghost {
    border: 1px solid var(--ghost-border);
    background: var(--ghost-bg);
    color: var(--text);
}

.btn.ghost:hover {
    border-color: var(--accent-ink);
    background: var(--accent-dim);
    transform: translateY(-3px);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.4rem;
    margin-top: 2.4rem;
    color: var(--dim);
    font-size: 0.85rem;
    animation: fadeUp 1.2s 0.32s ease both;
}

.hero-meta span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.hero-meta svg {
    width: 16px;
    height: 16px;
    color: var(--gold-ink);
}

/* terminal mock */
.terminal {
    background: var(--term-bg);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow), 0 0 60px rgba(0, 214, 200, 0.1);
    overflow: hidden;
    animation: fadeUp 1.1s 0.3s ease both;
    transform-style: preserve-3d;
}

.term-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 13px 16px;
    background: var(--term-head-bg);
    border-bottom: 1px solid var(--line);
}

.term-head .dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.dot.red {
    background: var(--red);
}

.dot.yellow {
    background: var(--gold);
}

.dot.green {
    background: var(--green);
}

.term-title {
    margin-left: 8px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.72rem;
    color: var(--dim);
    letter-spacing: 0.5px;
}

.term-body {
    padding: 18px 20px 20px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.7;
}

.t-user {
    color: var(--gold-ink);
    font-weight: 500;
}

.term-line {
    color: var(--term-text);
    margin-bottom: 14px;
    padding-left: 10px;
    border-left: 2px solid rgba(232, 164, 0, 0.5);
}

.term-bar {
    height: 4px;
    border-radius: 4px;
    background: var(--term-track);
    overflow: hidden;
    margin-bottom: 12px;
}

.term-bar .fill {
    height: 100%;
    width: 0;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--accent), var(--violet), var(--gold));
    transition: width 0.5s ease;
}

.term-steps {
    list-style: none;
    display: grid;
    gap: 7px;
}

.term-steps li {
    display: flex;
    gap: 10px;
    align-items: baseline;
    color: var(--dim);
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.45s ease, transform 0.45s ease, color 0.3s;
}

.term-steps li.on {
    opacity: 1;
    transform: translateX(0);
    color: var(--term-text);
}

.term-steps li.done {
    color: var(--green-ink);
}

.step-num {
    font-size: 0.68rem;
    color: var(--accent-ink);
    opacity: 0.8;
    flex-shrink: 0;
}

.term-done {
    margin-top: 14px;
    padding: 9px 12px;
    border-radius: 8px;
    background: rgba(0, 184, 134, 0.1);
    border: 1px solid var(--green-border);
    color: var(--green-ink);
    font-weight: 500;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.term-done.show {
    opacity: 1;
    transform: translateY(0);
}

.term-refs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s 0.2s ease, transform 0.6s 0.2s ease;
}

.term-refs.show {
    opacity: 1;
    transform: translateY(0);
}

.ref-chip {
    font-size: 0.66rem;
    padding: 3px 9px;
    border-radius: 100px;
    border: 1px solid var(--accent-border);
    background: var(--accent-dim);
    color: var(--accent-ink);
}

.scroll-hint {
    position: absolute;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    color: var(--dim);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    animation: fadeUp 1.4s 0.6s ease both;
}

.scroll-hint .chevron {
    width: 22px;
    height: 22px;
    border-right: 2px solid var(--accent-ink);
    border-bottom: 2px solid var(--accent-ink);
    transform: rotate(45deg);
    animation: bounce 1.6s infinite;
}

@keyframes bounce {
    0%,
    100% {
        transform: rotate(45deg) translate(0, 0);
    }
    50% {
        transform: rotate(45deg) translate(6px, 6px);
    }
}

/* ─────────────────────────── ticker ─────────────────────────── */
.ticker {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--bg-soft);
    overflow: hidden;
    padding: 14px 0;
    position: relative;
    z-index: 2;
}

.ticker-track {
    display: flex;
    width: max-content;
    animation: ticker 32s linear infinite;
}

.ticker-group {
    display: flex;
    gap: 3rem;
    padding-right: 3rem;
}

.ticker-group span {
    white-space: nowrap;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--dim);
    text-transform: uppercase;
}

.ticker-group span em {
    font-style: normal;
    color: var(--accent-ink);
}

@keyframes ticker {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

/* ─────────────────────────── sections ─────────────────────────── */
.section {
    padding: 110px 0;
    background: var(--bg);
}

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

.sec-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 64px;
}

.sec-tag {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-ink);
    margin-bottom: 14px;
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid var(--accent-border);
    border-radius: 100px;
    background: var(--accent-dim);
}

.sec-head h2 {
    font-size: clamp(1.9rem, 4vw, 2.9rem);
    margin-bottom: 16px;
}

.sec-head p {
    color: var(--dim);
    font-size: 1.06rem;
}

/* features grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.f-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 34px 30px;
    position: relative;
    overflow: hidden;
    transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.f-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 0%), var(--accent-dim), transparent 45%);
    opacity: 0;
    transition: opacity 0.35s;
    pointer-events: none;
}

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

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

.f-icon {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    margin-bottom: 20px;
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    color: var(--accent-ink);
    box-shadow: 0 0 22px rgba(0, 214, 200, 0.18);
}

.f-icon svg {
    width: 26px;
    height: 26px;
}

.f-card h3 {
    font-size: 1.22rem;
    margin-bottom: 10px;
}

.f-card p {
    color: var(--dim);
    font-size: 0.95rem;
}

/* memory spotlight */
.memory-band {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.memory-copy h2 {
    font-size: clamp(1.9rem, 3.6vw, 2.7rem);
    margin-bottom: 18px;
}

.memory-copy p {
    color: var(--dim);
    font-size: 1.05rem;
    margin-bottom: 16px;
}

.memory-list {
    list-style: none;
    display: grid;
    gap: 12px;
    margin-top: 26px;
}

.memory-list li {
    display: flex;
    gap: 12px;
    align-items: center;
    padding: 13px 16px;
    border-radius: 12px;
    background: var(--card);
    border: 1px solid var(--line);
    font-size: 0.95rem;
    transition: border-color 0.3s, transform 0.3s;
}

.memory-list li:hover {
    border-color: var(--gold-border);
    transform: translateX(6px);
}

.memory-list svg {
    width: 20px;
    height: 20px;
    color: var(--gold-ink);
    flex-shrink: 0;
}

.brain-stage {
    position: relative;
    height: 480px;
    perspective: 900px;
}

.brain-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, rgba(0, 214, 200, 0.6), rgba(124, 58, 237, 0.5) 60%, rgba(124, 58, 237, 0.15));
    filter: blur(2px);
    box-shadow: 0 0 90px rgba(0, 214, 200, 0.35), inset 0 0 60px rgba(255, 255, 255, 0.4);
    animation: coreSpin 10s ease-in-out infinite alternate;
}

@keyframes coreSpin {
    from {
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
    }
    to {
        transform: translate(-50%, -50%) rotate(18deg) scale(1.08);
    }
}

.m-chip {
    position: absolute;
    padding: 8px 14px;
    border-radius: 100px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.72rem;
    border: 1px solid var(--line);
    background: var(--chip-bg);
    box-shadow: var(--chip-shadow);
    white-space: nowrap;
    animation: chipFloat 7s ease-in-out infinite alternate;
}

.m-chip.c1 {
    top: 6%;
    left: 12%;
    color: var(--chip-c1);
    border-color: rgba(0, 214, 200, 0.4);
}

.m-chip.c2 {
    top: 16%;
    right: 6%;
    color: var(--chip-c2);
    border-color: rgba(232, 164, 0, 0.4);
    animation-delay: -1.4s;
}

.m-chip.c3 {
    bottom: 22%;
    left: 4%;
    color: var(--chip-c3);
    border-color: rgba(124, 58, 237, 0.35);
    animation-delay: -2.6s;
}

.m-chip.c4 {
    bottom: 8%;
    right: 14%;
    color: var(--chip-c4);
    border-color: rgba(0, 184, 134, 0.4);
    animation-delay: -3.8s;
}

.m-chip.c5 {
    top: 52%;
    left: 0;
    color: var(--chip-c5);
    border-color: rgba(212, 85, 106, 0.35);
    animation-delay: -5s;
}

@keyframes chipFloat {
    from {
        transform: translateY(0) rotate(-1.5deg);
    }
    to {
        transform: translateY(-22px) rotate(2deg);
    }
}

/* how it works */
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    counter-reset: step;
}

.step-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 36px 30px;
    position: relative;
    transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
    overflow: hidden;
}

.step-card:hover {
    transform: translateY(-8px);
    border-color: var(--violet-border);
    box-shadow: var(--card-glow);
}

.step-num-big {
    font-family: 'Roboto Mono', monospace;
    font-size: 3.4rem;
    font-weight: 700;
    line-height: 1;
    background: linear-gradient(180deg, var(--violet), rgba(124, 58, 237, 0.2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}

.step-card h3 {
    font-size: 1.18rem;
    margin-bottom: 10px;
}

.step-card p {
    color: var(--dim);
    font-size: 0.95rem;
}

.step-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--violet), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s ease;
}

.step-card:hover::after {
    transform: scaleX(1);
}

/* agent in action */
.agent-band {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.agent-copy h2 {
    font-size: clamp(1.9rem, 3.6vw, 2.7rem);
    margin-bottom: 18px;
}

.agent-copy p {
    color: var(--dim);
    font-size: 1.05rem;
    margin-bottom: 24px;
}

.agent-actions {
    display: grid;
    gap: 14px;
    list-style: none;
}

.agent-actions li {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 18px;
    border-radius: 12px;
    background: var(--card);
    border: 1px solid var(--line);
    font-size: 0.98rem;
    transition: border-color 0.3s, transform 0.3s;
}

.agent-actions li:hover {
    border-color: var(--accent-border);
    transform: translateX(6px);
}

.agent-actions svg {
    width: 22px;
    height: 22px;
    color: var(--accent-ink);
    flex-shrink: 0;
}

/* compare */
.compare-frame {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 5%;
}

.compare-img-wrap {
    position: relative;
    border-radius: 20px;
    border: 1px solid var(--line);
    padding: 14px;
    /* light panel: PerformanceComparer.png is designed for a light backdrop (kept light in both themes) */
    background: linear-gradient(160deg, #ffffff 0%, #eef1f7 100%);
    box-shadow: var(--panel-shadow);
    overflow: hidden;
}

.compare-img-wrap img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    background: #fff;
}

.compare-tag {
    position: absolute;
    top: 30px;
    right: 30px;
    padding: 9px 16px;
    border-radius: 100px;
    background: linear-gradient(120deg, var(--accent), #5fd4ff);
    color: #000;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 1px;
    box-shadow: 0 10px 30px rgba(0, 214, 200, 0.4);
    animation: floatTag 5s ease-in-out infinite;
    z-index: 2;
}

@keyframes floatTag {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.compare-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 34px;
}

.compare-chip {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 12px 22px;
    border-radius: 100px;
    background: var(--card);
    border: 1px solid var(--line);
    font-size: 0.92rem;
    color: var(--text);
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.compare-chip:hover {
    transform: translateY(-4px);
    border-color: var(--accent-border);
    box-shadow: var(--chip-shadow);
}

.compare-chip svg {
    width: 18px;
    height: 18px;
    color: var(--accent-ink);
}

/* stats */
.stats-band {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 26px;
}

.stat {
    text-align: center;
    padding: 40px 20px;
    border-radius: var(--radius);
    background: var(--card);
    border: 1px solid var(--line);
    position: relative;
    overflow: hidden;
    transition: transform 0.35s, border-color 0.35s;
}

.stat:hover {
    transform: translateY(-6px);
    border-color: var(--accent-border);
}

.stat .num {
    font-size: clamp(2.4rem, 5vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(120deg, var(--accent-ink), var(--gold-ink));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 6px;
}

.stat .lbl {
    color: var(--dim);
    font-size: 0.92rem;
    max-width: 220px;
    margin: 0 auto;
}

/* use cases */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.case-card {
    padding: 38px 30px;
    border-radius: var(--radius);
    background: var(--card);
    border: 1px solid var(--line);
    text-align: center;
    transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
}

.case-card:hover {
    transform: translateY(-8px);
    border-color: var(--gold-border);
    box-shadow: var(--card-glow);
}

.case-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--gold-dim);
    border: 1px solid var(--gold-border);
    color: var(--gold-ink);
}

.case-icon svg {
    width: 30px;
    height: 30px;
}

.case-card h3 {
    margin-bottom: 10px;
}

.case-card p {
    color: var(--dim);
    font-size: 0.95rem;
}

/* security */
.secu-band {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.secu-visual {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 380px;
}

.secu-ring {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    border: 1px dashed var(--accent-border);
    display: grid;
    place-items: center;
    animation: ringSpin 22s linear infinite;
}

.secu-ring::before {
    content: "";
    position: absolute;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    border: 1px dashed var(--violet-border);
}

@keyframes ringSpin {
    to {
        transform: rotate(360deg);
    }
}

.secu-shield {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at 35% 30%, rgba(0, 214, 200, 0.4), rgba(124, 58, 237, 0.35));
    color: #000;
    box-shadow: 0 0 70px rgba(0, 214, 200, 0.35);
}

.secu-shield svg {
    width: 62px;
    height: 62px;
}

.secu-copy h2 {
    font-size: clamp(1.9rem, 3.6vw, 2.7rem);
    margin-bottom: 18px;
}

.secu-copy p {
    color: var(--dim);
    font-size: 1.05rem;
    margin-bottom: 26px;
}

.secu-list {
    list-style: none;
    display: grid;
    gap: 14px;
}

.secu-list li {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 15px 18px;
    border-radius: 12px;
    background: var(--card);
    border: 1px solid var(--line);
}

.secu-list svg {
    width: 22px;
    height: 22px;
    color: var(--green-ink);
    flex-shrink: 0;
    margin-top: 2px;
}

.secu-list b {
    display: block;
    margin-bottom: 2px;
}

.secu-list span {
    color: var(--dim);
    font-size: 0.92rem;
}

/* testimonials */
.t-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.t-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 32px 28px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    transition: transform 0.35s, border-color 0.35s;
}

.t-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-border);
}

.t-stars {
    color: var(--gold-ink);
    font-size: 1rem;
    letter-spacing: 3px;
}

.t-card blockquote {
    color: var(--blockquote);
    font-size: 0.98rem;
    font-style: italic;
    flex: 1;
}

.t-who {
    display: flex;
    align-items: center;
    gap: 13px;
}

.t-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 0.95rem;
    color: #000;
    flex-shrink: 0;
}

.t-who b {
    display: block;
    font-size: 0.95rem;
}

.t-who span {
    color: var(--dim);
    font-size: 0.8rem;
}

.demo-note {
    text-align: center;
    margin-top: 30px;
    font-size: 0.8rem;
    color: #6f6f7c;
    font-family: 'Roboto Mono', monospace;
    letter-spacing: 1px;
}

/* about */
.about-card {
    max-width: 860px;
    margin: 0 auto;
    text-align: center;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 60px 7%;
}

.about-card h2 {
    font-size: clamp(1.9rem, 4vw, 2.7rem);
    margin-bottom: 22px;
}

.about-card p {
    color: var(--dim);
    font-size: 1.03rem;
    margin-bottom: 18px;
}

.about-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    margin-top: 30px;
}

.about-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 100px;
    border: 1px solid var(--line);
    background: var(--ghost-bg);
    color: var(--text);
    font-size: 0.9rem;
    transition: border-color 0.3s, background 0.3s, transform 0.3s;
}

.about-links a:hover {
    border-color: var(--accent-ink);
    background: var(--accent-dim);
    transform: translateY(-3px);
}

.about-links svg {
    width: 17px;
    height: 17px;
    color: var(--accent-ink);
}

/* client */
.client-card {
    max-width: 860px;
    margin: 0 auto;
    text-align: center;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 60px 7%;
}

.client-card h2 {
    font-size: clamp(1.9rem, 4vw, 2.7rem);
    margin-bottom: 22px;
}

.client-card p {
    color: var(--dim);
    font-size: 1.03rem;
    margin-bottom: 18px;
}

.client-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin: 28px 0 38px;
}

.client-list li {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 100px;
    border: 1px solid var(--line);
    background: var(--ghost-bg);
    color: var(--dim);
    font-size: 0.9rem;
}

.client-list svg {
    width: 16px;
    height: 16px;
    color: var(--green-ink);
    flex-shrink: 0;
}

.client-note {
    margin-top: 24px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.76rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--dim);
}

/* cta */
.cta-section {
    text-align: center;
    padding: 150px 0;
    overflow: hidden;
}

.cta-section .container {
    position: relative;
    z-index: 2;
}

.cta-section h2 {
    font-size: clamp(2.2rem, 5.4vw, 3.9rem);
    margin-bottom: 20px;
}

.cta-section p {
    color: var(--dim);
    font-size: 1.15rem;
    max-width: 640px;
    margin: 0 auto 40px;
}

.btn.big {
    padding: 18px 42px;
    font-size: 1.05rem;
}

/* footer */
footer {
    border-top: 1px solid var(--line);
    background: var(--footer-bg);
    padding: 56px 0 40px;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    font-size: 0.88rem;
    color: var(--dim);
    transition: color 0.25s;
}

.footer-links a:hover {
    color: var(--accent-ink);
}

.copyright {
    width: 100%;
    text-align: center;
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: #6a6a78;
    font-size: 0.85rem;
}

/* reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(34px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

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

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─────────────────────────── responsive ─────────────────────────── */
@media (max-width: 1024px) {
    .features-grid,
    .cases-grid,
    .t-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 860px) {
    .hero-grid,
    .memory-band,
    .agent-band,
    .secu-band {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .brain-stage {
        height: 400px;
    }

    .stats-band {
        grid-template-columns: repeat(2, 1fr);
    }

    .compare-tag {
        top: 16px;
        right: 16px;
        font-size: 0.7rem;
        padding: 7px 12px;
    }
}

@media (max-width: 1024px) {
    nav {
        padding: 0 1.1rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: calc(var(--nav-h) - 2px);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px 1.1rem 16px;
        background: var(--nav-mobile-bg);
        border-bottom: 1px solid var(--line);
        box-shadow: 0 24px 50px rgba(0, 0, 0, 0.18);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-10px);
        transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
    }

    .nav-links.open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-links li {
        border-bottom: 1px solid var(--line);
    }

    .nav-links li:last-child {
        border-bottom: none;
        margin-top: 12px;
    }

    .nav-links li.nav-li-theme {
        justify-content: center;
        padding: 8px 0;
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: 14px 4px;
        font-size: 1rem;
    }

    .nav-links .nav-cta {
        text-align: center;
        padding: 14px;
        font-size: 1rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 84px 0;
    }

    .hero .type-line {
        font-size: 1.02rem;
    }

    .features-grid,
    .cases-grid,
    .t-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .steps {
        gap: 20px;
    }

    .compare-frame {
        padding: 0 1.1rem;
    }

    .compare-img-wrap {
        padding: 8px;
    }

    .scroll-hint {
        display: none;
    }
}

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

    .container {
        padding: 0 1.1rem;
    }

    .hero-btns .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}