:root {
    --bg-base: #0a0a0b;
    --bg-accent: #111113;
    --ink: #f9f9fb;
    --muted: #8e8e93;
    --panel: rgba(22, 22, 26, 0.7);
    --line: rgba(255, 255, 255, 0.08);
    --accent: #007aff;
    --accent-glow: rgba(0, 122, 255, 0.25);
    --success: #32d74b;
    --error: #ff453a;
    --warning: #ffd60a;
    --shadow: 0 32px 64px -12px rgba(0, 0, 0, 0.6);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--bg-base);
    background-image: 
        radial-gradient(circle at 0% 0%, rgba(0, 122, 255, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 100% 100%, rgba(213, 103, 58, 0.08) 0%, transparent 40%);
    color: var(--ink);
    font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.02;
    pointer-events: none;
}

.page-shell {
    max-width: 1280px;
    margin: 0 auto;
    padding: 48px 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.hero {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 32px;
    margin-bottom: 24px;
}

.hero-copy {
    padding: 64px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 40px;
    background: var(--panel);
    backdrop-filter: blur(24px);
    box-shadow: var(--shadow);
}

.hero-copy h1 {
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(3.5rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 0.9;
    letter-spacing: -0.06em;
    margin: 0;
    background: linear-gradient(180deg, #fff 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.eyebrow {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero-text {
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--muted);
    margin: 32px 0;
    max-width: 42ch;
}

.hero-panel {
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: 40px;
    background: var(--panel);
    backdrop-filter: blur(24px);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.signal-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 24px;
    border-radius: 28px;
    border: 1px solid var(--line);
}

.signal-card strong {
    display: block;
    font-size: 1.1rem;
    margin: 8px 0;
    color: var(--ink);
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.metric-grid article {
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    border-radius: 24px;
    border: 1px solid var(--line);
    text-align: center;
}

.metric-grid strong {
    display: block;
    font-family: "Space Grotesk", sans-serif;
    font-size: 2rem;
    line-height: 1;
}

.metric-grid span {
    font-size: 0.8rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.workspace {
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 32px;
}

.card {
    background: var(--panel);
    backdrop-filter: blur(24px);
    border: 1px solid var(--line);
    border-radius: 36px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.composer-card { grid-column: 1; }
.config-card { grid-column: 2; }
.status-card { grid-column: 2; }
.requirements-card { grid-column: 1 / 3; }

.section-heading h2 {
    font-family: "Space Grotesk", sans-serif;
    font-size: 2.25rem;
    margin: 0;
    letter-spacing: -0.03em;
}

.section-note {
    font-size: 0.9rem;
    color: var(--muted);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin: 32px 0;
}

.platform-option {
    position: relative;
    padding: 24px;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.platform-option:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.platform-option input {
    position: absolute;
    opacity: 0;
}

.platform-option:has(input:checked) {
    background: var(--accent-glow);
    border-color: var(--accent);
}

.platform-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.platform-meta {
    font-size: 0.8rem;
    color: var(--muted);
}

.form-grid, .config-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

label {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--muted);
}

textarea, input {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 16px 20px;
    color: var(--ink);
    font-size: 1rem;
    transition: all 0.2s ease;
}

textarea:focus, input:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.validation-bar {
    margin: 24px 0;
    padding: 20px;
    border-radius: 20px;
    font-size: 0.95rem;
    line-height: 1.5;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--line);
}

.validation-bar.error {
    background: rgba(255, 69, 58, 0.05);
    border-color: rgba(255, 69, 58, 0.2);
    color: var(--error);
}

.validation-bar.ok {
    background: rgba(50, 215, 75, 0.05);
    border-color: rgba(50, 215, 75, 0.2);
    color: var(--success);
}

.button {
    font-family: inherit;
    font-weight: 700;
    font-size: 1rem;
    padding: 16px 32px;
    border-radius: 20px;
    border: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.button.primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 8px 32px var(--accent-glow);
}

.button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px var(--accent-glow);
}

.button.secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--ink);
    border: 1px solid var(--line);
}

.button.ghost {
    background: transparent;
    color: var(--muted);
}

.button:active { transform: scale(0.98); }
.button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.status-log {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
}

.status-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.status-item.success { border-color: var(--success); }
.status-item.error { border-color: var(--error); }
.status-item.pending { border-color: var(--warning); }

.status-item strong { font-size: 1rem; }
.status-item p { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.5; }

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.requirements-grid article {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
}

.requirements-grid h3 { font-family: "Space Grotesk", sans-serif; margin-top: 0; }
.requirements-grid p { font-size: 0.85rem; color: var(--muted); line-height: 1.6; }

@media (max-width: 1100px) {
    .hero, .workspace { grid-template-columns: 1fr; }
    .hero-panel { display: none; }
    .config-card, .status-card { grid-column: 1; }
    .requirements-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
    .platform-grid { grid-template-columns: repeat(2, 1fr); }
    .requirements-grid { grid-template-columns: 1fr; }
}