:root {
    --bg: #121212;
    --surface: #1e1e1e;
    --surface-2: #2c2c2c;
    --primary: #bb86fc;
    --primary-variant: #3700b3;
    --text: #ffffff;
    --text-secondary: #b0b0b0;
    --success: #03dac6;
    --danger: #cf6679;
    --warning: #fbbc04;
    --border: #333333;
    --radius: 10px;
}

* {
    box-sizing: border-box;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    padding-bottom: 40px;
}

header {
    background-color: var(--surface);
    padding: 14px 16px;
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1, h2, h3, h4 { margin: 0; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1.05rem; }

.container { padding: 12px; }

.header-actions { display: flex; gap: 8px; align-items: center; }
.header-btn { font-size: 1.3rem; padding: 8px 10px; }

.hidden { display: none !important; }
.text-muted { color: var(--text-secondary); font-size: 0.85rem; }
.text-small { font-size: 0.8rem; }
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mb-10 { margin-bottom: 10px; }
.divider { height: 1px; background: var(--border); margin: 12px 0; }