:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-muted: #eef3f8;
    --text: #17212b;
    --hint: #6b7785;
    --border: #dce4ef;
    --primary: #2481cc;
    --primary-soft: rgba(36, 129, 204, 0.12);
    --success: #3a9c62;
    --danger: #d9534f;
    --radius-lg: 18px;
    --radius-md: 14px;
    --shadow: 0 10px 30px rgba(23, 33, 43, 0.08);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    width: 100%;
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow-x: hidden;
}

body {
    overflow-y: auto;
    overscroll-behavior-y: auto;
    -webkit-font-smoothing: antialiased;
    -webkit-overflow-scrolling: touch;
}

.app-shell {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    padding: 18px 16px 20px;
    background: linear-gradient(135deg, #2c8adb 0%, #1968ad 100%);
    color: #fff;
    box-shadow: 0 8px 24px rgba(25, 104, 173, 0.22);
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.eyebrow {
    margin: 0 0 6px;
    font-size: 12px;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.app-header h1 {
    margin: 0;
    font-size: 24px;
    line-height: 1.2;
}

.subtitle {
    margin: 6px 0 0;
    font-size: 14px;
    opacity: 0.9;
}

.app-content {
    flex: 1 0 auto;
    min-height: auto;
    overflow: visible;
    padding: 16px 16px var(--tabbar-safe-space, 96px);
    touch-action: pan-y;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.toolbar {
    display: grid;
    gap: 10px;
    margin-bottom: 12px;
}

.toolbar-grid {
    grid-template-columns: 1fr;
}

.input,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    font-size: 15px;
    padding: 13px 14px;
}

.input {
    -webkit-appearance: none;
    appearance: none;
}

.input:focus {
    outline: 2px solid rgba(36, 129, 204, 0.18);
    border-color: var(--primary);
}

.button {
    font-weight: 600;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.button-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.toolbar .button {
    width: auto;
}

.section-meta {
    margin: 4px 0 14px;
    color: var(--hint);
    font-size: 13px;
}

.cards-list {
    display: grid;
    gap: 12px;
}

.card {
    background: var(--surface);
    border: 1px solid rgba(220, 228, 239, 0.85);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 14px;
    -webkit-tap-highlight-color: transparent;
}

.card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 10px;
}

.card-title {
    margin: 0;
    font-size: 16px;
    line-height: 1.35;
}

.card-subtitle {
    margin: 4px 0 0;
    color: var(--hint);
    font-size: 13px;
}

.badge {
    flex-shrink: 0;
    border-radius: 999px;
    padding: 6px 10px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.message-text {
    margin: 0 0 12px;
    font-size: 15px;
    line-height: 1.5;
    white-space: pre-wrap;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.meta-item {
    background: var(--surface-muted);
    border-radius: 12px;
    padding: 10px 12px;
}

.meta-label {
    display: block;
    color: var(--hint);
    font-size: 12px;
    margin-bottom: 4px;
}

.meta-value {
    display: block;
    font-size: 13px;
    line-height: 1.35;
    word-break: break-word;
}

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.chip {
    background: var(--surface-muted);
    color: var(--text);
    border-radius: 999px;
    padding: 7px 10px;
    font-size: 12px;
}

.card-actions {
    margin-top: 12px;
    display: flex;
    gap: 8px;
}

.button-secondary {
    background: var(--surface-muted);
}

.empty-state {
    background: rgba(255, 255, 255, 0.7);
    border: 1px dashed var(--border);
    border-radius: var(--radius-lg);
    color: var(--hint);
    padding: 24px 16px;
    text-align: center;
}

.link {
    color: var(--primary);
    text-decoration: none;
}

.card-actions .link {
    color: var(--text);
}

.group-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin-top: 10px;
}

.stat-pill {
    background: var(--surface-muted);
    border-radius: 12px;
    padding: 10px 8px;
    text-align: center;
}

.stat-pill-label {
    display: block;
    color: var(--hint);
    font-size: 11px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.stat-pill-value {
    display: block;
    font-size: 15px;
    font-weight: 700;
}

.is-pressed {
    transform: scale(0.985);
    opacity: 0.92;
}

@media (min-width: 720px) {
    .app-content {
        max-width: 760px;
        margin: 0 auto;
        width: 100%;
    }

    .toolbar-grid {
        grid-template-columns: 2fr 1fr 1fr auto;
        align-items: center;
    }

    .toolbar {
        grid-template-columns: 1fr auto;
        align-items: center;
    }
}