:root {
    --bg: #f8fafc;
    --card: #ffffff;
    --text-main: #111827;
    --text-sub: #64748b;
    --blue-dark: #0f2a5f;
    --red: #ef1d26;
    --green: #16a34a;
    --green-soft: #f0fdf4;
    --green-border: #bbf7d0;
    --red-soft: #fef2f2;
    --red-border: #fecaca;
    --border: #e8eef5;
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.12), 0 6px 16px rgba(0, 0, 0, 0.08);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --nav-height: 80px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    font-family: 'Be Vietnam Pro', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

#app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* TAB BAR (New Premium UI) */
#tab-bar {
    height: var(--nav-height);
    background-color: var(--card);
    display: flex;
    align-items: center;
    padding: 0 2rem;
    gap: 3rem;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    z-index: 1000;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 45px;
    height: 45px;
    object-fit: contain;
}

.logo-text-group {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.logo-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--red);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.logo-title span {
    color: var(--text-main);
}

.logo-subtitle {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-sub);
    letter-spacing: 0.05em;
}

.tabs {
    display: flex;
    gap: 0.5rem;
    height: 100%;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-sub);
    font-size: 0.95rem;
    font-weight: 700;
    padding: 0 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease, background-color 0.2s ease;
    position: relative;
    height: 100%;
}

.tab-btn i {
    width: 18px;
    height: 18px;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(0, 0, 0, 0.02);
}

.tab-btn.active {
    color: var(--red);
}

.tab-btn.active::after {
    content: '';
    position: absolute; left: 50%; top: 50%;
    bottom: -1px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--red);
    border-radius: 3px 3px 0 0;
}

.right-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-left: auto;
}

.date-picker-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(239, 29, 38, 0.05);
    color: var(--red);
    border: 1px solid rgba(239, 29, 38, 0.15);
    padding: 0.5rem 1.25rem;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 800;
    cursor: pointer;
    transition: 0.2s;
    font-family: 'Be Vietnam Pro', sans-serif;
    font-variant-numeric: tabular-nums;
}

.date-picker-btn:hover {
    background: rgba(239, 29, 38, 0.1);
}

.qr-button {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: 0.2s;
}

.qr-button:hover {
    background: #e2e8f0;
}

/* CONTENT AREA */
#content-area {
    flex: 1;
    position: relative;
    background-color: var(--bg);
    overflow: hidden;
    contain: layout paint;
}

#zoom-container { width: 100%; height: 100%; position: relative; overflow: hidden; }

iframe { width: 100%; height: 100%; border: none; display: none; position: absolute; left: 0; top: 0; background: transparent; }

iframe.active { display: block; z-index: 10; }

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.spin {
    animation: spin 1s linear infinite;
}

.zoom-controls {
    display: none; /* Hide zoom controls for now as new UI is responsive enough */
}