/* Light mode (default) */
:root {
    --bg: #ffffff;
    --panel: #f4f4f5;
    --surface: #ffffff;
    --text: #09090b;
    --text-sub: #52525b;
    --muted: #a1a1aa;
    --primary: #09090b;
    --primary-fg: #ffffff;
    --border: #e4e4e7;
    --border-strong: #09090b;
    --card-bg: #ffffff;
    --ring: rgba(0, 0, 0, 0.1);
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 999px;

    /* Animation Specifics - Mapped to Monochrome */
    --anim-stroke: var(--text);
    --anim-fill: var(--bg);
    --anim-accent: var(--text);
}

/* Dark mode */
[data-theme="dark"] {
    --bg: #09090b;
    --panel: #18181b;
    --surface: #000000;
    --text: #f4f4f5;
    --text-sub: #a1a1aa;
    --muted: #52525b;
    --primary: #ffffff;
    --primary-fg: #000000;
    --border: #27272a;
    --border-strong: #ffffff;
    --card-bg: #09090b;
    --ring: rgba(255, 255, 255, 0.2);
}

* {
    box-sizing: border-box;
}
html,
body {
    height: 100%;
    scroll-behavior: smooth;
}
body {
    margin: 0;
    font-family:
        "Inter",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.5;
}

.noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns=%22http://www.w3.org/2000/svg%22 width=%22128%22 height=%22128%22 viewBox=%220 0 128 128%22><filter id=%22n%22><feTurbulence type=%22fractalNoise%22 baseFrequency=%220.8%22 numOctaves=%223%22 stitchTiles=%22stitch%22/></filter><rect width=%22100%25%22 height=%22100%25%22 filter=%22url(%23n)%22 opacity=%220.5%22/></svg>");
    z-index: 50;
    mix-blend-mode: overlay;
}

.container {
    width: min(1200px, 90vw);
    margin: 0 auto;
}

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(12px);
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.brand {
    display: flex;
    gap: 12px;
    align-items: center;
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
    font-size: 20px;
    letter-spacing: -0.03em;
}
.links {
    display: flex;
    gap: 24px;
}
.links a {
    color: var(--text-sub);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}
.links a:hover {
    color: var(--text);
}
.cta-group {
    display: flex;
    gap: 16px;
    align-items: center;
}

.lang-switch {
    display: inline-flex;
    padding: 2px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--panel);
}
.lang-switch .chip {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--text-sub);
    cursor: pointer;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 600;
    transition: 0.2s;
}
.lang-switch .chip:hover {
    color: var(--text);
}
.lang-switch .chip.active {
    color: var(--text);
    background: var(--bg);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    cursor: pointer;
}
.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-fg);
    border-color: var(--primary);
}
.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}
.btn-ghost:hover {
    border-color: var(--text);
    background: var(--panel);
}
.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text);
    border: 1px solid var(--border);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    background: var(--surface);
}

/* Hero */
.hero {
    padding: 100px 0 60px;
    overflow: visible;
}
.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}
.copy h1 {
    font-size: clamp(48px, 5vw, 72px);
    line-height: 1.05;
    margin: 24px 0;
    letter-spacing: -0.04em;
    font-weight: 800;
}

.highlight {
    display: inline-block;
    position: relative;
    height: 1.1em;
    min-width: 320px;
    vertical-align: bottom;
    overflow: visible;
}
.highlight-text {
    position: absolute;
    left: 0;
    bottom: 0;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(15px);
    transition:
        opacity 0.4s ease,
        transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    line-height: 1.1;
}
.highlight-text.active {
    opacity: 1;
    transform: translateY(0);
}

.copy .sub {
    margin: 0 0 32px;
    color: var(--text-sub);
    font-size: clamp(18px, 2vw, 20px);
    line-height: 1.5;
    max-width: 480px;
}
.cta-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.stage {
    position: relative;
    flex-shrink: 0;
    width: 100%;
    padding: 20px;
    border: 1px solid var(--border);
    background: var(--panel);
    border-radius: var(--radius-lg);
}
.stage img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
    border: 1px solid var(--border);
    box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.12);
}

/* Features Grid */
.features {
    padding: 80px 0;
    border-top: 1px solid var(--border);
}
.features-title {
    text-align: left;
    font-size: 32px;
    margin: 0 0 60px;
    font-weight: 700;
    letter-spacing: -0.03em;
}
.grid {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

/* Base Card */
.card {
    border: 1px solid var(--border);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.card:hover {
    border-color: var(--border-strong);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.15);
}
.card h3 {
    margin: 24px 0 12px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    position: relative;
    z-index: 2;
}
.card p {
    margin: 0;
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.6;
    position: relative;
    z-index: 2;
}

.card .icon {
    width: auto;
    height: auto;
    opacity: 1;
}

/* ==========================================================================
   ORIGINAL ANIMATIONS RESTORED (Monochrome Adaptation)
   ========================================================================== */

/* 1. Smoothing Card */
.card-smoothing {
    background: linear-gradient(
        160deg,
        var(--card-bg) 97%,
        color-mix(in srgb, var(--card-bg) 90%, var(--text))
    );
}
.card-smoothing:hover::before {
    opacity: 0.05;
    transform: scale(1.05);
}
.smoothing-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -6px -6px 18px;
    padding: 8px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}
.smoothing-stage {
    position: relative;
    width: 100%;
    max-width: 210px;
    aspect-ratio: 3 / 2;
    border-radius: 12px;
    padding: 12px;
    background: var(--bg);
    border: 2px solid var(--text);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.smoothing-svg {
    width: 100%;
    height: 100%;
    max-width: none;
}
.card-smoothing .ink-pass {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: opacity 0.4s ease; /* Smooth fade out */
}
.card-smoothing:hover .ink-pass {
    opacity: 0.1;
}

.card-smoothing .ink-pass--draft {
    stroke: var(--muted);
    stroke-width: 3;
    opacity: 0.42;
}
.card-smoothing .ink-pass--refine {
    stroke: var(--text-sub);
    stroke-width: 4;
    opacity: 0.65;
}
.card-smoothing .ink-pass--final {
    stroke: var(--text);
    stroke-width: 5;
    opacity: 1;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.card-smoothing .ink-trace {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 320;
    stroke-dashoffset: 320;
    opacity: 0;
    pointer-events: none;
}
.card-smoothing .ink-trace--draft {
    stroke: var(--muted);
    stroke-width: 4; /* Increased width */
}
.card-smoothing .ink-trace--refine {
    stroke: var(--text-sub);
    stroke-width: 5; /* Increased width */
}
.card-smoothing .ink-trace--final {
    stroke: var(--text);
    stroke-width: 6; /* Increased width */
}

.card-smoothing:hover .ink-trace--draft {
    animation: ink-trace-draft 1.0s cubic-bezier(0.48, 0, 0.31, 1) 0s forwards;
}
.card-smoothing:hover .ink-trace--refine {
    animation: ink-trace-refine 1.2s cubic-bezier(0.48, 0, 0.31, 1) 0.2s forwards;
}
.card-smoothing:hover .ink-trace--final {
    animation: ink-trace-final 1.5s cubic-bezier(0.23, 1, 0.32, 1) 0.5s forwards;
}

@keyframes ink-trace-draft {
    0% {
        stroke-dashoffset: 320;
        opacity: 0;
    }
    50% {
        opacity: 1; /* Full opacity */
    }
    100% {
        stroke-dashoffset: 0;
        opacity: 0;
    }
}
@keyframes ink-trace-refine {
    0% {
        stroke-dashoffset: 320;
        opacity: 0;
    }
    50% {
        opacity: 1; /* Full opacity */
    }
    100% {
        stroke-dashoffset: 0;
        opacity: 0;
    }
}
@keyframes ink-trace-final {
    0% {
        stroke-dashoffset: 320;
        opacity: 0;
        transform: scale(1);
        transform-origin: center;
    }
    60% {
        opacity: 1;
    }
    80% {
        transform: scale(1.03); /* Subtle pop */
    }
    100% {
        stroke-dashoffset: 0;
        opacity: 1; /* Stays visible */
        transform: scale(1);
    }
}

/* 2. AutoText Card */
.autotext-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -6px -6px 18px;
    padding: 10px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1);
}
.autotext-stage {
    position: relative;
    width: 100%;
    max-width: 212px;
    aspect-ratio: 5 / 3.4;
    border-radius: 12px;
    padding: 12px;
    display: grid;
    grid-template-rows: repeat(2, 1fr);
    gap: 12px;
    background: var(--bg);
    border: 2px solid var(--text);
    overflow: hidden;
}
.autotext-box {
    position: relative;
    border: 2px solid var(--text);
    border-radius: 10px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    background: var(--bg);
    transform-origin: left top;
    transition: box-shadow 0.45s ease;
}
.autotext-box--top {
    width: 96%;
    margin-left: 0;
}
.autotext-box--bottom {
    width: 72%;
    margin-left: auto;
    transform-origin: right top;
}
.card-autotext:hover .autotext-box {
    box-shadow: 0 8px 20px -12px rgba(0, 0, 0, 0.2);
}

.autotext-line {
    display: block;
    height: 4px;
    border-radius: 999px;
    background: var(--text);
    opacity: 0.82;
}
.autotext-line--xl {
    width: 88%;
}
.autotext-line--lg {
    width: 72%;
}
.autotext-line--md {
    width: 60%;
}
.autotext-line--sm {
    width: 42%;
}
.autotext-line--xs {
    width: 32%;
}

.autotext-resizer {
    position: absolute;
    inset: 10px;
    display: grid;
    place-items: center;
    pointer-events: none;
}
.autotext-handle {
    position: absolute;
    background: var(--text);
    opacity: 0.2;
    border-radius: 999px;
}
.autotext-handle--vertical {
    width: 2px;
    height: 76%;
}
.autotext-handle--horizontal {
    height: 2px;
    width: 85%;
}
.autotext-pulse {
    position: relative;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--text);
    opacity: 0;
}

.card-autotext:hover .autotext-box--top {
    animation: autotext-top-shift 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}
.card-autotext:hover .autotext-box--bottom {
    animation: autotext-bottom-shift 1.2s cubic-bezier(0.22, 1, 0.36, 1) 0.12s;
}
.card-autotext:hover .autotext-line--xl {
    animation: autotext-line-flow-xl 1s ease-in-out 0.04s;
}
.card-autotext:hover .autotext-line--lg {
    animation: autotext-line-flow-lg 1.05s ease-in-out 0.08s;
}
.card-autotext:hover .autotext-line--md {
    animation: autotext-line-flow-md 0.92s ease-in-out 0.16s;
}
.card-autotext:hover .autotext-line--sm {
    animation: autotext-line-flow-sm 0.88s ease-in-out 0.18s;
}
.card-autotext:hover .autotext-handle--vertical {
    animation: autotext-handle-vert 1.05s ease-in-out 0.12s;
}
.card-autotext:hover .autotext-handle--horizontal {
    animation: autotext-handle-horz 1.05s ease-in-out;
}
.card-autotext:hover .autotext-pulse {
    animation: autotext-pulse 1.05s ease-in-out 0.18s;
}

@keyframes autotext-top-shift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    28% {
        transform: translate(4px, -6px) scaleX(1.08) scaleY(0.9);
    }
    56% {
        transform: translate(-6px, 5px) scaleX(0.78) scaleY(1.08);
    }
    100% {
        transform: translate(0, 0) scale(1);
    }
}
@keyframes autotext-bottom-shift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    28% {
        transform: translate(-10px, -4px) scaleX(1.18) scaleY(0.9);
    }
    52% {
        transform: translate(8px, 8px) scaleX(0.78) scaleY(1.12);
    }
    100% {
        transform: translate(0, 0) scale(1);
    }
}
@keyframes autotext-line-flow-xl {
    0% {
        width: 88%;
    }
    40% {
        width: 72%;
    }
    70% {
        width: 96%;
    }
    100% {
        width: 88%;
    }
}
@keyframes autotext-line-flow-lg {
    0% {
        width: 72%;
    }
    45% {
        width: 56%;
    }
    75% {
        width: 82%;
    }
    100% {
        width: 72%;
    }
}
@keyframes autotext-line-flow-md {
    0% {
        width: 60%;
    }
    52% {
        width: 80%;
    }
    100% {
        width: 60%;
    }
}
@keyframes autotext-line-flow-sm {
    0% {
        width: 42%;
    }
    40% {
        width: 28%;
    }
    68% {
        width: 52%;
    }
    100% {
        width: 42%;
    }
}
@keyframes autotext-handle-vert {
    0% {
        opacity: 0;
        transform: translateY(-6px) scaleY(0.75);
    }
    40% {
        opacity: 0.45;
        transform: translateY(0) scaleY(1.05);
    }
    70% {
        opacity: 0.28;
        transform: translateY(4px) scaleY(0.92);
    }
    100% {
        opacity: 0.32;
        transform: translateY(0) scaleY(1);
    }
}
@keyframes autotext-handle-horz {
    0% {
        opacity: 0;
        transform: translateX(-8px) scaleX(0.7);
    }
    46% {
        opacity: 0.45;
        transform: translateX(0) scaleX(1.08);
    }
    80% {
        opacity: 0.28;
        transform: translateX(6px) scaleX(0.9);
    }
    100% {
        opacity: 0.32;
        transform: translateX(0) scaleX(1);
    }
}
@keyframes autotext-pulse {
    0% {
        opacity: 0;
        transform: scale(0.4);
    }
    35% {
        opacity: 0.65;
        transform: scale(1);
    }
    60% {
        opacity: 0.35;
        transform: scale(1.3);
    }
    100% {
        opacity: 0;
        transform: scale(1.6);
    }
}

/* 3. Connectors Card */
.connectors-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -6px -6px 18px;
    padding: 10px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1);
}
.connectors-stage {
    position: relative;
    width: 100%;
    max-width: 212px;
    aspect-ratio: 5 / 3.3;
    border-radius: 12px;
    padding: 16px 16px 18px;
    background: var(--bg);
    border: 2px solid var(--text);
    overflow: hidden;
    --node-width: 96px;
    --node-height: 48px;
    --source-top: 18px;
    --source-left: 18px;
    --target-top: 94px;
    --target-right: 18px;
    --source-right: calc(var(--source-left) + var(--node-width));
    --source-center-y: calc(var(--source-top) + var(--node-height) / 2);
    --target-left: calc(100% - var(--target-right) - var(--node-width));
    --target-center-x: calc(var(--target-left) + var(--node-width) / 2);
    --target-top: 94px;
    --source-connector-x: var(--source-right);
    --source-connector-y: var(--source-center-y);
    --route-turn-x: var(--target-center-x);
    --handle-drop-y: calc(var(--target-top) - var(--source-connector-y));
}

.connectors-node {
    position: absolute;
    width: var(--node-width);
    height: var(--node-height);
    border: 2px solid var(--text);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    background: var(--bg);
    transition: box-shadow 0.45s ease;
}
.connectors-node--source {
    top: var(--source-top);
    left: var(--source-left);
}
.connectors-node--target {
    top: var(--target-top);
    right: var(--target-right);
    position: absolute;
}

.connectors-node-line {
    display: block;
    height: 4px;
    border-radius: 999px;
    background: var(--text);
    opacity: 0.82;
}
.connectors-node-line--lg {
    width: 74%;
}
.connectors-node-line--sm {
    width: 46%;
}
.connectors-node-line--xs {
    width: 34%;
}

.connectors-path {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.connectors-segment {
    position: absolute;
    background: var(--text);
    opacity: 0.55;
}
.connectors-segment--start {
    top: calc(var(--source-connector-y) - 1px);
    left: var(--source-connector-x);
    width: calc(var(--route-turn-x) - var(--source-connector-x));
    height: 2px;
}
.connectors-segment--middle {
    top: var(--source-connector-y);
    left: calc(var(--route-turn-x) - 1px);
    width: 2px;
    height: var(--handle-drop-y);
}
.connectors-path--live .connectors-segment {
    background: var(--text);
    opacity: 0;
}
.connectors-path--live .connectors-segment--start {
    transform-origin: left center;
    transform: scaleX(0);
}
.connectors-path--live .connectors-segment--middle {
    transform-origin: center top;
    transform: scaleY(0);
}

.connectors-handle {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--text);
    background: var(--bg);
    top: calc(var(--source-center-y) - 6px);
    left: calc(var(--source-right) - 6px);
    z-index: 2;
    opacity: 0;
}

.card-connectors:hover .connectors-path--live .connectors-segment--start {
    animation: connectors-start 0.55s cubic-bezier(0.48, 0, 0.31, 1) 0.05s
        forwards;
}
.card-connectors:hover .connectors-path--live .connectors-segment--middle {
    animation: connectors-middle 0.68s cubic-bezier(0.48, 0, 0.31, 1) 0.24s
        forwards;
}
.card-connectors:hover .connectors-handle {
    animation: connectors-handle 1.15s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes connectors-start {
    0% {
        transform: scaleX(0);
        opacity: 0;
    }
    40% {
        opacity: 0.85;
    }
    100% {
        transform: scaleX(1);
        opacity: 0;
    }
}
@keyframes connectors-middle {
    0% {
        transform: scaleY(0);
        opacity: 0;
    }
    50% {
        opacity: 0.85;
    }
    100% {
        transform: scaleY(1);
        opacity: 0;
    }
}
@keyframes connectors-handle {
    0% {
        top: calc(var(--source-center-y) - 6px);
        left: calc(var(--source-right) - 6px);
        opacity: 0.85;
    }
    35% {
        top: calc(var(--source-center-y) - 6px);
        left: calc(var(--route-turn-x) - 6px);
        opacity: 0.95;
    }
    70% {
        top: calc(var(--target-top) - 6px);
        left: calc(var(--route-turn-x) - 6px);
        opacity: 0.9;
    }
    100% {
        top: calc(var(--target-top) - 6px);
        left: calc(100% - var(--target-right) - 50px);
        opacity: 0;
    }
}

/* 4. Folders Card - Advanced Stack Animation */
.folders-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -6px -6px 18px;
    padding: 12px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.65s cubic-bezier(0.19, 1, 0.22, 1);
}

.folders-stage {
    position: relative;
    width: 100%;
    max-width: 212px;
    aspect-ratio: 5 / 3.4;
    border-radius: 12px;
    padding: 20px;
    background: var(--bg);
    border: 2px solid var(--text);
    overflow: visible; /* Allow pop-out */
    display: grid;
    place-items: center;
    perspective: 1000px;
}

.folders-group {
    position: relative;
    width: 120px;
    height: 90px;
    transform-style: preserve-3d;
    transform: translateY(10px) rotateX(10deg);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card-folders:hover .folders-group {
    transform: translateY(15px) rotateX(20deg);
}

/* Folder Parts */
.f-folder-back {
    position: absolute;
    inset: 0;
    background: var(--text);
    border-radius: 6px 6px 0 0;
    transform-origin: bottom center;
    transform: translateZ(-10px);
    opacity: 0.1;
}

.f-folder-front {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80%;
    background: var(--bg);
    border: 2px solid var(--text);
    border-radius: 0 0 6px 6px;
    z-index: 10;
    transform-origin: bottom center;
    transform: rotateX(0deg);
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.f-label {
    width: 50%;
    height: 6px;
    background: var(--text);
    border-radius: 3px;
    opacity: 0.2;
}

.card-folders:hover .f-folder-front {
    transform: rotateX(-25deg);
}

/* Files */
.f-file {
    position: absolute;
    bottom: 10px;
    left: 10px;
    width: calc(100% - 20px);
    height: 90%;
    background: var(--bg);
    border: 1px solid var(--text);
    border-radius: 4px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    transform-origin: bottom center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* File Internal styling */
.f-tag {
    width: 40%;
    height: 4px;
    border-radius: 2px;
}
.f-lines span {
    display: block;
    height: 3px;
    background: var(--text);
    opacity: 0.1;
    margin-bottom: 4px;
    border-radius: 2px;
}
.f-lines span:last-child { width: 70%; }

/* Context Colors (Monochrome variants) */
.f-file--1 .f-tag { background: var(--text); opacity: 0.8; }
.f-file--2 .f-tag { background: var(--text); opacity: 0.5; }
.f-file--3 .f-tag { background: var(--text); opacity: 0.2; }

/* Stacking Logic (Idle) */
.f-file--1 { z-index: 3; transform: scale(0.95) translateY(0); }
.f-file--2 { z-index: 2; transform: scale(0.90) translateY(4px); opacity: 0; }
.f-file--3 { z-index: 1; transform: scale(0.85) translateY(8px); opacity: 0; }

/* Fan Out Logic (Hover) */
.card-folders:hover .f-file--1 {
    transform: translateY(-40px) translateX(-25px) rotate(-10deg) scale(1);
    box-shadow: -4px 8px 12px rgba(0,0,0,0.1);
}

.card-folders:hover .f-file--2 {
    opacity: 1;
    transform: translateY(-50px) rotate(0deg) scale(1);
    box-shadow: 0 8px 12px rgba(0,0,0,0.1);
    transition-delay: 0.05s;
}

.card-folders:hover .f-file--3 {
    opacity: 1;
    transform: translateY(-40px) translateX(25px) rotate(10deg) scale(1);
    box-shadow: 4px 8px 12px rgba(0,0,0,0.1);
    transition-delay: 0.1s;
}

/* 5. Mermaid Card - Advanced Animation */
.mermaid-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -6px -6px 18px;
    padding: 12px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.65s cubic-bezier(0.19, 1, 0.22, 1);
}

.mermaid-stage {
    position: relative;
    width: 100%;
    max-width: 210px;
    aspect-ratio: 5 / 3.4;
    border-radius: 12px;
    background: var(--bg);
    border: 2px solid var(--text);
    overflow: hidden;
    isolation: isolate;
    display: grid;
    place-items: center;
}

.mermaid-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    display: grid;
    place-items: center;
}

/* --- Code Layer --- */
.mermaid-code {
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 120px;
    transform-origin: center;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.m-line {
    display: flex;
    align-items: center;
    gap: 6px;
    height: 8px;
}

.m-token {
    height: 100%;
    border-radius: 4px;
    background: var(--text);
    transition: all 0.4s ease;
}

/* Token Specifics */
.m-token-kw { width: 24px; opacity: 0.9; }
.m-token-id { width: 40px; opacity: 0.6; }
.m-token-arr { width: 16px; opacity: 0.5; }
.m-token-txt { width: 50px; opacity: 0.7; }

/* Cursor */
.m-cursor {
    width: 8px;
    height: 14px;
    background: var(--text);
    margin-top: 4px;
    animation: m-blink 1s step-end infinite;
}

/* Hover: Code Transformation */
.card-mermaid:hover .mermaid-code {
    transform: translateY(-10px); /* Gentle lift before vanish */
}

.card-mermaid:hover .m-cursor {
    display: none;
}

.card-mermaid:hover .m-line-1 {
    animation: m-code-vanish 0.4s cubic-bezier(0.5, 0, 0.2, 1) forwards;
}
.card-mermaid:hover .m-line-2 {
    animation: m-code-vanish 0.4s cubic-bezier(0.5, 0, 0.2, 1) 0.1s forwards;
}
.card-mermaid:hover .m-line-3 {
    animation: m-code-vanish 0.4s cubic-bezier(0.5, 0, 0.2, 1) 0.2s forwards;
}

/* --- Diagram Layer --- */
.mermaid-diagram {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0; /* Gap handled by link height */
    opacity: 0;
    pointer-events: none;
}

.card-mermaid:hover .mermaid-diagram {
    opacity: 1;
    transition: opacity 0.1s 0.3s;
}

/* Nodes */
.m-node {
    background: var(--bg);
    border: 2px solid var(--text);
    display: grid;
    place-items: center;
    position: relative;
    z-index: 2;
    opacity: 0;
}

.m-node-start {
    width: 48px;
    height: 48px;
    border-radius: 50%; /* Circle */
    transform: translateY(-20px) scale(0.5);
}

.m-node-end {
    width: 80px;
    height: 40px;
    border-radius: 8px; /* Rect */
    transform: translateY(20px) scale(0.5);
}

.m-node-line {
    width: 60%;
    height: 4px;
    border-radius: 2px;
    background: var(--text);
    opacity: 0.4;
}

/* Link */
.m-link {
    position: relative;
    width: 2px;
    height: 40px;
    z-index: 1;
}

.m-link-path {
    position: absolute;
    inset: 0;
    background: var(--text);
    transform-origin: top center;
    transform: scaleY(0);
}

.m-link-head {
    position: absolute;
    bottom: -6px;
    left: -4px;
    width: 10px;
    height: 10px;
    border-left: 2px solid var(--text);
    border-bottom: 2px solid var(--text);
    transform: rotate(-45deg) scale(0);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.m-link-pulse {
    position: absolute;
    top: 0;
    left: -2px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text);
    opacity: 0;
}

/* Hover Sequence: Diagram Build */

/* 1. Start Node Pops */
.card-mermaid:hover .m-node-start {
    animation: m-pop-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s forwards;
}

/* 2. Link Grows */
.card-mermaid:hover .m-link-path {
    animation: m-grow-down 0.4s cubic-bezier(0.22, 1, 0.36, 1) 0.5s forwards;
}
.card-mermaid:hover .m-link-head {
    transform: rotate(-45deg) scale(1);
    transition-delay: 0.8s;
}

/* 3. End Node Pops */
.card-mermaid:hover .m-node-end {
    animation: m-pop-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.7s forwards;
}

/* 4. Data Pulse (Continuous after build) */
.card-mermaid:hover .m-link-pulse {
    animation: m-pulse-travel 1.5s cubic-bezier(0.45, 0, 0.55, 1) 1s infinite;
}

/* --- Keyframes --- */

@keyframes m-blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes m-code-vanish {
    0% {
        opacity: 1;
        transform: translateX(0) scaleX(1);
    }
    40% {
        opacity: 1;
        transform: translateX(-10px) scaleX(0.8);
    }
    100% {
        opacity: 0;
        transform: translateX(20px) scaleX(0);
    }
}

@keyframes m-pop-in {
    0% {
        opacity: 0;
        transform: translateY(var(--ty, 0)) scale(0);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes m-grow-down {
    0% { transform: scaleY(0); }
    100% { transform: scaleY(1); }
}

@keyframes m-pulse-travel {
    0% {
        opacity: 0;
        transform: translateY(0) scale(0.5);
    }
    20% {
        opacity: 1;
        transform: translateY(4px) scale(1);
    }
    80% {
        opacity: 1;
        transform: translateY(36px) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(40px) scale(0.5);
    }
}

/* 6. Privacy Card */
.privacy-visual {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -6px -6px 18px;
    padding: 11px;
    border-radius: 14px;
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.65s cubic-bezier(0.19, 1, 0.22, 1);
}
.privacy-stage {
    position: relative;
    width: 100%;
    max-width: 212px;
    aspect-ratio: 5 / 3.4;
    border-radius: 12px;
    padding: 16px 18px 18px;
    background: var(--bg);
    border: 2px solid var(--text);
    overflow: hidden;
    isolation: isolate;
    transform-style: preserve-3d;
}

.privacy-data {
    position: absolute;
    top: 20px;
    left: 18px;
    right: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1;
}
.privacy-line {
    display: block;
    height: 4px;
    border-radius: 999px;
    background: var(--text);
    opacity: 0.8;
    transition:
        transform 0.6s cubic-bezier(0.19, 1, 0.22, 1),
        opacity 0.5s ease,
        filter 0.5s ease;
}
.privacy-line--personal {
    width: 78%;
}
.privacy-line--activity {
    width: 62%;
}
.privacy-line--location {
    width: 54%;
}
.privacy-line--metadata {
    width: 42%;
}

.privacy-shield {
    position: absolute;
    bottom: 22px;
    left: 50%;
    width: 36px;
    height: 36px;
    transform: translateX(-50%);
    z-index: 3;
}
.privacy-shield-core {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--text);
    background: var(--bg);
    transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.privacy-shield-core::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14px;
    height: 16px;
    background: var(--text);
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z'/%3E%3C/svg%3E");
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    transform: translate(-50%, -50%);
    opacity: 0.8;
    transition:
        opacity 0.5s ease,
        transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.privacy-scanner {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--text);
    opacity: 0;
    transform: translateY(-10px);
    z-index: 4;
}

/* Privacy Hover */
.card-privacy:hover .privacy-line {
    filter: blur(1px);
    opacity: 0.3;
    transform: scaleX(0.6);
}
.card-privacy:hover .privacy-line--personal {
    transform: scaleX(0.4);
    animation: privacy-scramble 0.8s ease-in-out 0.2s;
}
.card-privacy:hover .privacy-line--activity {
    transform: scaleX(0.5);
    animation: privacy-scramble 0.9s ease-in-out 0.3s;
}
.card-privacy:hover .privacy-shield-core {
    transform: scale(1.2);
}
.card-privacy:hover .privacy-shield-core::after {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}
.card-privacy:hover .privacy-scanner {
    animation: privacy-scan 1.2s ease-in-out infinite;
    opacity: 1;
}

@keyframes privacy-scramble {
    0% {
        transform: scaleX(0.4);
    }
    50% {
        transform: scaleX(0.8) translateX(5px);
    }
    100% {
        transform: scaleX(0.4);
    }
}
@keyframes privacy-scan {
    0% {
        transform: translateY(-10px);
        opacity: 0;
    }
    20% {
        opacity: 1;
    }
    80% {
        opacity: 1;
    }
    100% {
        transform: translateY(180px);
        opacity: 0;
    }
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-sub);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: var(--panel);
}

/* Footer & Pricing */
.pricing {
    padding: 100px 0;
    text-align: center;
}
.pricing-inner {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    max-width: 1200px;
    margin: 0 auto;
}
.pricing h2 {
    font-size: 36px;
    margin: 16px 0;
    font-weight: 800;
    letter-spacing: -0.03em;
}
.pricing p {
    font-size: 18px;
    color: var(--text-sub);
    margin-bottom: 32px;
}

.early-access {
    padding: 80px 0;
    background: var(--text);
    color: var(--bg);
}
.ea-inner {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}
.ea-inner h2 {
    color: var(--bg);
    margin-bottom: 16px;
    font-size: 32px;
}
.ea-inner p {
    color: color-mix(in srgb, var(--bg) 80%, transparent);
    margin-bottom: 32px;
}
.ea-form {
    display: flex;
    gap: 12px;
}
.ea-form input {
    flex: 1;
    padding: 14px;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
}
.ea-form button {
    background: transparent;
    color: var(--bg);
    border: 1px solid var(--bg);
}
.ea-form button:hover {
    background: var(--bg);
    color: var(--text);
}

.faq {
    padding: 100px 0;
    border-top: 1px solid var(--border);
}
.faq h2 {
    font-size: 32px;
    margin-bottom: 48px;
    letter-spacing: -0.03em;
}
.faq details {
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
}
.faq summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 18px;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.faq summary::after {
    content: "+";
    font-size: 24px;
    font-weight: 300;
}
.faq details[open] summary::after {
    content: "−";
}
.faq p {
    margin: 16px 0 0;
    color: var(--text-sub);
    line-height: 1.6;
    max-width: 700px;
}

.footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    font-size: 14px;
}
.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}
@media (min-width: 768px) {
    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
    }
}
.footer-links a {
    margin-left: 24px;
    color: var(--muted);
    text-decoration: none;
}
.footer-links a:hover {
    color: var(--text);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        width: 92vw;
    }

    /* Nav Mobile */
    .nav-inner {
        height: 64px;
    }
    .links {
        display: none;
    } /* Hide links on mobile for cleaner UI */
    .brand {
        font-size: 18px;
    }
    .cta-group .btn span {
        display: none;
    } /* Hide "Whiteboard" text in CTA, keep icon/Short text if any */
    .cta-group .btn {
        padding: 8px 14px;
        font-size: 13px;
    }

    /* Hero Mobile */
    .hero {
        padding: 40px 0;
    }
    .hero-inner {
        display: flex;
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    .copy {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .copy h1 {
        font-size: 36px;
        line-height: 1.1;
        margin: 16px 0;
    }
    .copy .sub {
        font-size: 16px;
        margin-bottom: 24px;
    }

    .highlight {
        display: block;
        min-width: auto;
        height: 1.2em; /* Reserve height for the new line */
        margin-top: 8px;
    }

    .highlight-text {
        width: 100%;
        text-align: center;
    }

    .cta-row {
        justify-content: center;
        width: 100%;
    }
    .cta-row .btn {
        width: 100%;
        justify-content: center;
    }

    .stage {
        padding: 10px;
        margin-top: 10px;
    }

    /* Grid Mobile */
    .grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* Adjust other sections */
    .features {
        padding: 60px 0;
    }
    .features-title {
        text-align: center;
        margin-bottom: 40px;
    }

    .pricing,
    .faq,
    .footer {
        padding: 60px 0;
    }
    .pricing-inner {
        padding: 32px 20px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 20px;
    }
    .footer-links {
        margin: 0;
        display: flex;
        gap: 20px;
    }
    .footer-links a {
        margin: 0;
    }
}