/* Theme: matches your app's Light/Dark look */
:root {
    /* Light */
    --bg: #f7f7f9;
    --surface: #ffffff;
    --text: #0b1220;
    --muted: #5b677e;
    --brand: #0a84ff;
    /* iOS system blue vibe */
    --card-border: rgba(17, 24, 39, .08);
    --shadow: 0 10px 30px rgba(0, 0, 0, .08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b0f17;
        --surface: #151b26;
        --text: #e7ebf6;
        --muted: #aab4d4;
        --brand: #0a84ff;
        --card-border: rgba(255, 255, 255, .06);
        --shadow: 0 12px 32px rgba(0, 0, 0, .35);
    }
}

* {
    box-sizing: border-box
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, "Helvetica Neue", Arial
}

.container {
    max-width: 1040px;
    margin: 0 auto;
    padding: 24px
}

/* Top nav */
.nav {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: space-between
}

.nav a {
    color: var(--text);
    text-decoration: none;
    opacity: .9
}

.nav a:hover {
    opacity: 1
}

.brand {
    font-weight: 700;
    letter-spacing: .2px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
}

.brand-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 12px;
    text-decoration: none;
    background: var(--brand);
    color: #fff;
    font-weight: 600;
    box-shadow: var(--shadow)
}

.btn:hover {
    filter: brightness(1.05)
}

/* Sections & cards */
.section {
    margin: 36px 0
}

.card {
    background: var(--surface);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow)
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px
}

.small {
    font-size: 14px;
    color: var(--muted)
}

.footer {
    margin-top: 48px;
    padding: 24px 0;
    color: var(--muted);
    border-top: 1px solid var(--card-border)
}

/* HERO */
.hero {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 28px;
    align-items: center
}

@media (max-width:900px) {
    .hero {
        grid-template-columns: 1fr
    }
    
    .hero h1 {
        font-size: 36px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .hero-icon {
        width: 40px;
        height: 40px;
    }
}

.hero h1 {
    font-size: 44px;
    line-height: 1.1;
    margin: 0 0 6px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.hero-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hero p {
    margin: 0 0 16px;
    color: var(--muted)
}

/* DEVICE FRAMES (for screenshots) */
.gallery {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.gallery[hidden] {
    display: none !important;
}

.device {
    position: relative;
    width: 120px;
    max-width: 100%;
    flex: 0 0 auto;
    border-radius: 20px;
    padding: 8px;
    background: linear-gradient(180deg, rgba(255, 255, 255, .65), rgba(255, 255, 255, .25));
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow)
}

@media (prefers-color-scheme: dark) {
    .device {
        background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02))
    }
}

.device::before {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 3px;
    width: 50px;
    height: 3px;
    border-radius: 2px;
    background: rgba(0, 0, 0, .25)
}

.device img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 16px
}

/* Tabs for Light/Dark screenshots */
.tabs {
    display: inline-flex;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    overflow: hidden;
    background: var(--surface);
    margin-bottom: 20px;
}

.tab {
    padding: 8px 14px;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text);
    font: inherit;
}

.tab[aria-selected="true"] {
    background: var(--brand);
    color: #fff;
}

/* Screenshot grid section */
.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px
}

.screenshot-grid[hidden] {
    display: none !important;
}

.screenshot-grid .device {
    width: 100%
}

/* Utility */
.center {
    text-align: center
}