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

:root {
    --bg: #0f0f14;
    --surface: #1a1a24;
    --border: #2a2a3a;
    --text: #e8e8f0;
    --muted: #9999b0;
    --accent: #7c5cfc;
    --radius: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

main {
    width: 100%;
    max-width: 640px;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    text-align: center;
    background: linear-gradient(135deg, #fff 0%, #c4b5fd 50%, #7c5cfc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: clamp(0.9rem, 2vw, 1.05rem);
    color: var(--muted);
    text-align: center;
}

.demo-area {
    padding: 24px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
    width: 100%;
    display: flex;
    justify-content: center;
}

.confetti-btn {
    font-size: 1.15rem;
    font-weight: 700;
    padding: 16px 44px;
    border: none;
    border-radius: 60px;
    background: linear-gradient(135deg, #7c5cfc 0%, #a78bfa 100%);
    color: #fff;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 24px rgba(124, 92, 252, 0.3);
    position: relative;
    z-index: 2;
}

.confetti-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 32px rgba(124, 92, 252, 0.5);
}

.confetti-btn:active {
    transform: scale(0.97);
}

.code-container {
    width: 100%;
    background: #12121a;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.code-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: transparent;
    color: var(--muted);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.copy-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.copy-btn.copied {
    border-color: #4ade80;
    color: #4ade80;
}

.code-block {
    padding: 14px 16px;
    overflow-x: auto;
    overflow-y: hidden;
    font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.75rem;
    line-height: 1.5;
    color: #c4c4dc;
    white-space: nowrap;
}

/* How-to Section */
.how-to {
    width: 100%;
    margin-top: 4px;
}

.how-to h2 {
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 10px;
    color: var(--text);
}

.platforms {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.platform-card {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.78rem;
}

.platform-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: var(--border);
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--text);
    flex-shrink: 0;
}

.platform-name {
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
}

.platform-step {
    color: var(--muted);
    white-space: nowrap;
}

@media (max-width: 560px) {
    main { padding: 16px; gap: 14px; }
    .demo-area { padding: 24px 12px; }
    .confetti-btn { font-size: 1rem; padding: 14px 32px; }
    .code-block { font-size: 0.62rem; }
    .platforms { flex-direction: column; }
}

@media (max-height: 700px) {
    main { gap: 12px; }
    .demo-area { padding: 20px 12px; }
}