:root {
    color-scheme: dark;
    --bg: #0b0f18;
    --surface: rgba(17, 24, 39, 0.9);
    --surface-soft: rgba(25, 34, 55, 0.78);
    --ink: #f7f8fb;
    --muted: #97a2bd;
    --line: rgba(255, 255, 255, 0.1);
    --line-strong: rgba(255, 255, 255, 0.16);
    --accent: #7c3aed;
    --accent-strong: #22d3ee;
    --radius-3xl: 34px;
    --radius-2xl: 28px;
    --radius-xl: 22px;
    --radius-lg: 18px;
    --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.34);
    --shadow-md: 0 18px 34px rgba(0, 0, 0, 0.24);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", "Segoe UI", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at top right, rgba(124, 58, 237, 0.18), transparent 20%),
        radial-gradient(circle at bottom left, rgba(34, 211, 238, 0.14), transparent 20%),
        linear-gradient(180deg, #0b0f18 0%, #05070d 100%);
}

button,
input,
select,
a {
    font: inherit;
}

.shell {
    width: min(1500px, calc(100% - 40px));
    margin: 28px auto 40px;
}

.hero-band,
.stage-card,
.builder-card,
.output-card {
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-lg);
}

.hero-band {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 24px;
    padding: 34px;
    margin-bottom: 24px;
}

.eyebrow {
    margin: 0;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(151, 162, 189, 0.86);
}

h1,
h2 {
    margin: 0;
    letter-spacing: -0.04em;
}

h1 {
    margin-top: 10px;
    font-size: 30px;
    line-height: 1;
}

h2 {
    font-size: 1.68rem;
    line-height: 1.02;
}

.lead,
.section-head p,
.helper-text,
.status-text,
.line-list {
    color: var(--muted);
}

.lead {
    margin: 16px 0 0;
    line-height: 1.72;
    max-width: 780px;
}

.hero-notes {
    display: grid;
    align-content: start;
    gap: 10px;
}

.hero-notes span {
    display: inline-flex;
    width: fit-content;
    min-height: 40px;
    padding: 0 16px;
    align-items: center;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.24), rgba(34, 211, 238, 0.16));
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-weight: 800;
}

.generator-grid {
    display: grid;
    grid-template-columns: 480px minmax(0, 1fr) 360px;
    gap: 24px;
    align-items: start;
}

.stage-column,
.builder-column,
.output-column {
    display: grid;
    gap: 18px;
}

.output-column {
    position: sticky;
    top: 24px;
}

.stage-card,
.builder-card,
.output-card {
    padding: 24px;
}

.builder-shell {
    display: grid;
    gap: 18px;
}

.section-head {
    display: grid;
    gap: 10px;
    margin-bottom: 18px;
}

.section-head.compact {
    margin-bottom: 16px;
}

.section-head p {
    margin: 0;
    line-height: 1.7;
}

.button-stage {
    min-height: 340px;
    display: grid;
    place-items: center;
    padding: 28px;
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
        radial-gradient(circle at center, rgba(124, 58, 237, 0.14), transparent 45%);
}

.button-stage[data-stage-mode="light"] {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(244, 247, 255, 0.98)),
        linear-gradient(180deg, rgba(0, 0, 0, 0.02), rgba(0, 0, 0, 0));
}

.family-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.family-chip {
    min-height: 42px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.03);
    color: var(--ink);
    font-weight: 700;
}

.family-chip.is-active {
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.36), rgba(34, 211, 238, 0.2));
    border-color: rgba(124, 58, 237, 0.44);
}

.field-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.field {
    display: grid;
    gap: 10px;
}

.field-full {
    grid-column: 1 / -1;
}

.field > span {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(151, 162, 189, 0.82);
}

input[type="text"],
select {
    width: 100%;
    min-height: 58px;
    padding: 0 16px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.04);
    color: var(--ink);
}

input[type="text"]:focus,
select:focus {
    outline: 0;
    border-color: rgba(124, 58, 237, 0.5);
    box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.14);
}

select {
    appearance: none;
    padding-right: 52px;
    background-image:
        linear-gradient(45deg, transparent 50%, rgba(255, 255, 255, 0.86) 50%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.86) 50%, transparent 50%);
    background-position: calc(100% - 24px) calc(50% - 3px), calc(100% - 16px) calc(50% - 3px);
    background-size: 8px 8px, 8px 8px;
    background-repeat: no-repeat;
}

.color-row {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 12px;
}

input[type="color"] {
    width: 100%;
    min-height: 58px;
    padding: 0;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.04);
}

.action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

button,
.ghost-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 20px;
    border-radius: 999px;
    font-weight: 800;
    cursor: pointer;
}

button {
    border: 0;
    color: var(--ink);
    background: linear-gradient(180deg, #ffffff, #e8edf8);
}

.ghost-button {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    color: var(--ink);
}

.code-block {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    color: #d9e1ff;
    line-height: 1.72;
}

.line-list {
    margin: 12px 0 0;
    padding-left: 18px;
    line-height: 1.8;
}

.preview-button {
    --button-primary: #7c3aed;
    --button-secondary: #22d3ee;
    --button-text: #ffffff;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    border: 0;
    cursor: pointer;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.preview-button.size-sm {
    min-height: 46px;
    padding: 0 18px;
    font-size: 0.94rem;
}

.preview-button.size-md {
    min-height: 56px;
    padding: 0 24px;
    font-size: 1rem;
}

.preview-button.size-lg {
    min-height: 66px;
    padding: 0 30px;
    font-size: 1.08rem;
}

.preview-button.radius-soft { border-radius: 18px; }
.preview-button.radius-pill { border-radius: 999px; }
.preview-button.radius-sharp { border-radius: 10px; }
.preview-button.icon-left { flex-direction: row-reverse; }

.button-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
}

.preview-button.family-glow {
    color: var(--button-text);
    background: linear-gradient(135deg, var(--button-primary), var(--button-secondary));
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.08) inset,
        0 0 30px color-mix(in srgb, var(--button-primary) 48%, transparent),
        0 18px 34px rgba(0, 0, 0, 0.28);
}

.preview-button.family-glow:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.14) inset,
        0 0 42px color-mix(in srgb, var(--button-primary) 62%, transparent),
        0 24px 42px rgba(0, 0, 0, 0.3);
}

.preview-button.family-metal {
    color: #0f172a;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.96), rgba(212, 221, 238, 0.8)),
        linear-gradient(135deg, var(--button-primary), var(--button-secondary));
    border: 1px solid rgba(255, 255, 255, 0.65);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.9),
        inset 0 -2px 6px rgba(15, 23, 42, 0.18),
        0 14px 28px rgba(0, 0, 0, 0.24);
}

.preview-button.family-metal:hover {
    transform: translateY(-1px);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.96),
        inset 0 -1px 4px rgba(15, 23, 42, 0.14),
        0 20px 36px rgba(0, 0, 0, 0.28);
}

.preview-button.family-animated {
    color: var(--button-text);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.14);
    box-shadow: 0 18px 28px rgba(0, 0, 0, 0.22);
    overflow: hidden;
}

.preview-button.family-animated::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--button-primary) 56%, transparent), transparent);
    transform: translateX(-100%);
    animation: sweep 2.8s linear infinite;
}

.preview-button.family-animated:hover {
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.24);
    box-shadow: 0 24px 38px rgba(0, 0, 0, 0.28);
}

.preview-button.family-retro {
    color: var(--button-text);
    background: linear-gradient(180deg, var(--button-primary), color-mix(in srgb, var(--button-primary) 74%, black));
    box-shadow:
        0 8px 0 color-mix(in srgb, var(--button-secondary) 55%, black),
        0 18px 28px rgba(0, 0, 0, 0.22);
    transform: translateY(-4px);
}

.preview-button.family-retro:hover {
    transform: translateY(-6px);
    box-shadow:
        0 10px 0 color-mix(in srgb, var(--button-secondary) 58%, black),
        0 24px 34px rgba(0, 0, 0, 0.28);
}

.preview-button.family-liquid {
    color: var(--button-text);
    background:
        radial-gradient(circle at 25% 25%, rgba(255,255,255,0.3), transparent 24%),
        linear-gradient(135deg, var(--button-primary), var(--button-secondary));
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.28),
        inset 0 -8px 18px rgba(255,255,255,0.06),
        0 18px 30px rgba(0, 0, 0, 0.28);
}

.preview-button.family-liquid:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.32),
        inset 0 -8px 18px rgba(255,255,255,0.08),
        0 24px 38px rgba(0, 0, 0, 0.3);
}

.preview-button.family-keyboard {
    color: var(--button-text);
    background: linear-gradient(180deg, color-mix(in srgb, var(--button-primary) 70%, white), var(--button-primary));
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.26),
        0 10px 0 color-mix(in srgb, var(--button-primary) 70%, black),
        0 16px 24px rgba(0, 0, 0, 0.24);
    transform: translateY(-5px);
}

.preview-button.family-keyboard:hover {
    transform: translateY(-7px);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.32),
        0 12px 0 color-mix(in srgb, var(--button-primary) 74%, black),
        0 22px 30px rgba(0, 0, 0, 0.28);
}

@keyframes sweep {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.ad-slot,
.ad-placeholder {
    min-height: 320px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    overflow: hidden;
}

.ad-placeholder {
    padding: 16px;
}

.ad-mockup {
    position: relative;
    min-height: 286px;
    height: 100%;
    border-radius: 18px;
    background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
}

.ad-mockup::before {
    content: "";
    position: absolute;
    inset: 14px;
    border-radius: 14px;
    border: 1px dashed rgba(255, 255, 255, 0.12);
}

.ad-mockup-top,
.ad-mockup-media,
.ad-mockup-badge,
.ad-mockup-lines {
    position: absolute;
}

.ad-mockup-top {
    top: 24px;
    left: 24px;
    width: 110px;
    height: 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
}

.ad-mockup-media {
    inset: 78px 24px 106px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(124,58,237,.18), rgba(34,211,238,.14));
}

.ad-mockup-lines {
    left: 24px;
    right: 24px;
    bottom: 28px;
    display: grid;
    gap: 10px;
}

.ad-mockup-lines span {
    display: block;
    height: 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
}

.ad-mockup-lines span:last-child {
    width: 58%;
}

.ad-mockup-badge {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 142px;
    height: 142px;
    border-radius: 50%;
    display: grid;
    place-content: center;
    background: linear-gradient(135deg, #7c3aed, #22d3ee);
    color: #fff;
}

.ad-mockup-badge span {
    font-size: 1.35rem;
    font-weight: 800;
    line-height: 1;
    text-align: center;
    letter-spacing: 0.08em;
}

@media (max-width: 1280px) {
    .generator-grid {
        grid-template-columns: 1fr;
    }

    .output-column {
        position: static;
    }
}

@media (max-width: 920px) {
    .hero-band,
    .field-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .shell {
        width: min(100% - 24px, 1500px);
    }

    .hero-band,
    .stage-card,
    .builder-card,
    .output-card {
        padding: 20px;
        border-radius: 24px;
    }

    .color-row {
        grid-template-columns: 1fr;
    }
}