/* ============================================
   WiFi Voucher Portal — Design System v3
   Premium, enterprise-grade, cohesive
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Primary — Brand identity */
    --color-primary: #111827;
    --color-primary-hover: #1f2937;
    --color-primary-subtle: #f3f4f6;

    /* Secondary — Teal accent for highlights, charts, badges */
    --color-secondary: #0d9488;
    --color-secondary-hover: #0f766e;
    --color-secondary-subtle: #f0fdfa;
    --color-secondary-light: #99f6e4;

    /* Accent — Blue for links, interactive elements */
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-subtle: #eff6ff;

    /* Semantic */
    --color-success: #059669;
    --color-success-subtle: #ecfdf5;
    --color-warning: #d97706;
    --color-warning-subtle: #fffbeb;
    --color-error: #dc2626;
    --color-error-subtle: #fef2f2;
    --color-info: #0284c7;
    --color-info-subtle: #f0f9ff;

    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-25: #fcfcfd;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Surfaces */
    --surface: var(--color-white);
    --surface-page: #f8fafc;
    --surface-raised: var(--color-white);

    /* Borders */
    --border-default: #e2e7ee;
    --border-subtle: #eef2f6;

    /* Text */
    --text-primary: var(--color-gray-900);
    --text-secondary: var(--color-gray-600);
    --text-tertiary: var(--color-gray-400);
    --text-inverse: var(--color-white);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

    --text-xs: 11px;
    --text-sm: 13px;
    --text-base: 14px;
    --text-md: 15px;
    --text-lg: 18px;
    --text-xl: 24px;
    --text-2xl: 30px;
    --text-3xl: 36px;

    --leading-tight: 1.25;
    --leading-normal: 1.5;

    /* Spacing (4px grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 200ms ease;

    /* Layout */
    --header-height: 64px;
    --sidebar-width: 248px;
    --content-max-width: 1280px;

    color-scheme: light;
}

/* ── Dark theme ───────────────────────────── */

:root[data-theme="dark"] {
    color-scheme: dark;

    --color-primary: #e5e7eb;
    --color-primary-hover: #f3f4f6;
    --color-primary-subtle: #1f2937;

    --color-secondary: #2dd4bf;
    --color-secondary-hover: #5eead4;
    --color-secondary-subtle: #0f2e2b;
    --color-secondary-light: #134e4a;

    --color-accent: #60a5fa;
    --color-accent-hover: #93c5fd;
    --color-accent-subtle: #17233a;

    --color-success: #34d399;
    --color-success-subtle: #0c2e21;
    --color-warning: #fbbf24;
    --color-warning-subtle: #322408;
    --color-error: #f87171;
    --color-error-subtle: #3a1414;
    --color-info: #38bdf8;
    --color-info-subtle: #0c2536;

    --color-gray-25: #12151c;
    --color-gray-50: #151922;
    --color-gray-100: #1b202b;
    --color-gray-200: #232936;
    --color-gray-300: #2f3644;
    --color-gray-400: #4b5563;
    --color-gray-500: #6b7280;
    --color-gray-600: #9ca3af;
    --color-gray-700: #d1d5db;
    --color-gray-800: #e5e7eb;
    --color-gray-900: #f9fafb;

    --surface: #151922;
    --surface-page: #0b0d12;
    --surface-raised: #1b202b;

    --border-default: #262c38;
    --border-subtle: #1d222c;

    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --text-inverse: #0b0d12;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.35), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

/* ── Reset ────────────────────────────────── */

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--surface-page);
    -webkit-font-smoothing: antialiased;
    transition: background var(--transition-base), color var(--transition-base);
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Public Layout ────────────────────────── */

.container {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    padding: var(--space-10) var(--space-5);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-10) var(--space-8);
    box-shadow: var(--shadow-sm);
}

/* ── Header (Public) ──────────────────────── */

.header { text-align: center; margin-bottom: var(--space-8); }

.brand-icon {
    width: 56px; height: 56px;
    margin: 0 auto var(--space-4);
    display: flex; align-items: center; justify-content: center;
}

.brand-icon img { width: 100%; height: 100%; object-fit: contain; }

.header h1 {
    font-size: var(--text-xl); font-weight: 700;
    color: var(--text-primary); letter-spacing: -0.02em;
    margin-bottom: var(--space-1);
}

.header .subtitle { font-size: var(--text-base); color: var(--text-secondary); }

/* ── Alerts ───────────────────────────────── */

.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    font-size: var(--text-base); font-weight: 500;
    display: flex; align-items: center; gap: var(--space-3);
}

.alert-error { background: var(--color-error-subtle); border: 1px solid #fecaca; color: #991b1b; }
.alert-success { background: var(--color-success-subtle); border: 1px solid #a7f3d0; color: #065f46; }
.alert-info { background: var(--color-info-subtle); border: 1px solid #bae6fd; color: #075985; }

/* ── Forms ────────────────────────────────── */

.voucher-form { margin-bottom: var(--space-6); }

.form-group { margin-bottom: var(--space-5); }

.form-group label {
    display: block; font-size: var(--text-sm); font-weight: 500;
    color: var(--text-secondary); margin-bottom: var(--space-2);
}

.form-group .form-hint {
    font-size: var(--text-xs); color: var(--text-tertiary);
    margin-top: var(--space-1);
}

.input-wrapper { position: relative; }

.input-wrapper input,
.form-input,
.form-select,
.form-number {
    width: 100%; padding: 10px 12px;
    font-size: var(--text-base); font-family: var(--font-sans);
    color: var(--text-primary); background: var(--surface);
    border: 1px solid var(--border-default); border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-wrapper input:focus,
.form-input:focus,
.form-select:focus,
.form-number:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.input-wrapper input::placeholder { color: var(--text-tertiary); }

.voucher-form .input-wrapper input {
    font-family: var(--font-mono); font-size: var(--text-lg);
    font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
    padding: 12px 14px;
}

.input-wrapper .input-icon {
    position: absolute; right: 12px; top: 50%;
    transform: translateY(-50%); font-size: 16px; color: var(--text-tertiary);
}

.form-select {
    appearance: none; cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-number { max-width: 200px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

/* ── Buttons ──────────────────────────────── */

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: var(--space-2); padding: 10px 16px;
    font-size: var(--text-base); font-weight: 500; font-family: var(--font-sans);
    text-decoration: none; border: 1px solid transparent;
    border-radius: var(--radius-md); cursor: pointer;
    transition: all var(--transition-fast);
    width: 100%; white-space: nowrap;
}

.btn:focus-visible { outline: 2px solid var(--color-secondary); outline-offset: 2px; }

.btn-primary {
    background: var(--color-primary); color: var(--text-inverse);
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-hover); border-color: var(--color-primary-hover);
    text-decoration: none;
}

.btn-secondary {
    background: var(--surface); color: var(--text-primary);
    border-color: var(--border-default);
}
.btn-secondary:hover { background: var(--color-gray-50); text-decoration: none; }

.btn-accent {
    background: var(--color-secondary); color: var(--text-inverse);
    border-color: var(--color-secondary);
}
.btn-accent:hover {
    background: var(--color-secondary-hover); border-color: var(--color-secondary-hover);
    text-decoration: none;
}

.btn-danger {
    background: var(--color-error); color: var(--text-inverse);
    border-color: var(--color-error);
}
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; text-decoration: none; }

.btn-ghost {
    background: transparent; color: var(--text-secondary);
    border-color: transparent; padding: 6px 10px;
}
.btn-ghost:hover { background: var(--color-gray-100); color: var(--text-primary); }

.btn-small { padding: 6px 12px; font-size: var(--text-sm); width: auto; }
.btn-tiny { padding: 4px 10px; font-size: var(--text-xs); width: auto; border-radius: var(--radius-sm); }

/* ── Links ────────────────────────────────── */

.info-section {
    text-align: center; padding-top: var(--space-5);
    border-top: 1px solid var(--border-subtle); margin-top: var(--space-5);
}

.info-section p { color: var(--text-secondary); font-size: var(--text-base); margin-bottom: var(--space-3); }

.info-link { color: var(--color-accent); text-decoration: none; font-weight: 500; font-size: var(--text-sm); }
.info-link:hover { text-decoration: underline; }

.mac-badge {
    display: inline-flex; align-items: center; gap: var(--space-1);
    padding: 4px 10px; background: var(--color-gray-100);
    border-radius: var(--radius-sm); font-size: var(--text-xs);
    color: var(--text-tertiary); font-family: var(--font-mono);
    margin-top: var(--space-4);
}

/* ── Status Page ──────────────────────────── */

.status-card { text-align: center; }

.status-info {
    background: var(--color-gray-50); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md); padding: var(--space-5); margin-bottom: var(--space-6);
}

.status-row {
    display: flex; justify-content: space-between; align-items: center;
    padding: var(--space-3) 0; border-bottom: 1px solid var(--border-subtle);
}

.status-row:last-child { border-bottom: none; padding-bottom: 0; }
.status-row:first-child { padding-top: 0; }

.status-label { color: var(--text-secondary); font-size: var(--text-base); }
.status-value { font-weight: 600; font-size: var(--text-base); color: var(--text-primary); }

.status-value.online { color: var(--color-success); display: flex; align-items: center; gap: var(--space-2); }
.status-value.online::before { content: ''; width: 8px; height: 8px; background: var(--color-success); border-radius: 50%; }

.countdown-display {
    background: var(--color-gray-900); border-radius: var(--radius-lg);
    padding: var(--space-6); margin-bottom: var(--space-6); color: var(--text-inverse);
}

.countdown-label {
    font-size: var(--text-xs); font-weight: 500; opacity: 0.7;
    margin-bottom: var(--space-1); text-transform: uppercase; letter-spacing: 0.05em;
}

.countdown-time { font-size: 36px; font-weight: 700; font-family: var(--font-mono); letter-spacing: 1px; }

.progress-section { margin-bottom: var(--space-6); }

.progress-track {
    height: 6px; background: var(--color-gray-100);
    border-radius: 3px; overflow: hidden; margin-bottom: var(--space-2);
}

.progress-fill { height: 100%; border-radius: 3px; background: var(--color-secondary); transition: width 1s linear; }
.progress-fill.warning { background: var(--color-warning); }
.progress-fill.danger { background: var(--color-error); }

.progress-text { display: flex; justify-content: space-between; font-size: var(--text-xs); color: var(--text-tertiary); }

.tips-box {
    background: var(--color-accent-subtle); border: 1px solid #bfdbfe;
    border-radius: var(--radius-md); padding: var(--space-4);
    margin-bottom: var(--space-5); text-align: left;
}

.tips-box h3 { color: var(--color-accent); font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-3); }
.tips-box ul { list-style: none; }
.tips-box li { color: #1e40af; font-size: var(--text-sm); padding: var(--space-1) 0; padding-left: var(--space-5); position: relative; }
.tips-box li::before { content: '→'; position: absolute; left: 0; color: var(--color-accent); }

.footer { text-align: center; padding: var(--space-5); color: var(--text-tertiary); font-size: var(--text-xs); }
.footer a { color: var(--text-secondary); }

/* ── Admin Shell: Sidebar + Topbar ─────────── */

.app-shell { min-height: 100vh; background: var(--surface-page); }

.sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-width);
    background: var(--surface); border-right: 1px solid var(--border-default);
    display: flex; flex-direction: column; z-index: 200;
    transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.sidebar-brand {
    display: flex; align-items: center; gap: var(--space-3);
    padding: var(--space-5) var(--space-5); height: var(--header-height);
    text-decoration: none; color: var(--text-primary);
    border-bottom: 1px solid var(--border-subtle); flex-shrink: 0;
}
.sidebar-brand:hover { text-decoration: none; }
.sidebar-brand img { height: 26px; width: auto; flex-shrink: 0; }
.sidebar-brand-text { font-size: var(--text-md); font-weight: 700; letter-spacing: -0.01em; white-space: nowrap; }

.sidebar-nav {
    display: flex; flex-direction: column; gap: 2px;
    padding: var(--space-4); overflow-y: auto; flex: 1;
}

.sidebar-link {
    display: flex; align-items: center; gap: var(--space-3);
    padding: 10px var(--space-3); border-radius: var(--radius-md);
    color: var(--text-secondary); text-decoration: none;
    font-size: var(--text-sm); font-weight: 500;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.sidebar-icon { font-size: 15px; width: 18px; text-align: center; flex-shrink: 0; }

.sidebar-link:hover { color: var(--text-primary); background: var(--color-gray-100); text-decoration: none; }
.sidebar-link.active {
    color: var(--color-secondary); background: var(--color-secondary-subtle); font-weight: 600;
}

.sidebar-footer {
    padding: var(--space-4) var(--space-5); border-top: 1px solid var(--border-subtle);
    font-size: var(--text-xs); color: var(--text-tertiary); flex-shrink: 0;
}

.sidebar-toggle {
    display: none; align-items: center; justify-content: center;
    width: 34px; height: 34px; background: transparent; border: 1px solid var(--border-default);
    border-radius: var(--radius-md); cursor: pointer; flex-shrink: 0; color: var(--text-secondary);
}
.sidebar-toggle:hover { color: var(--text-primary); background: var(--color-gray-100); }

.sidebar-collapse-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 30px; height: 30px; background: transparent; border: none;
    cursor: pointer; flex-shrink: 0; color: var(--text-secondary);
    transition: color var(--transition-fast);
}
.sidebar-collapse-toggle:hover { color: var(--text-primary); }

.sidebar-scrim {
    display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.45); z-index: 150;
}
.sidebar-scrim.open { display: block; }

.app-main {
    margin-left: var(--sidebar-width); min-height: 100vh; display: flex; flex-direction: column;
    transition: margin-left var(--transition-base);
}

/* Desktop sidebar collapse (persisted via localStorage) */
@media (min-width: 769px) {
    :root.sidebar-collapsed .sidebar { transform: translateX(-100%); }
    :root.sidebar-collapsed .app-main { margin-left: 0; }
}

.topbar {
    background: var(--surface); border-bottom: 1px solid var(--border-default);
    height: var(--header-height); position: sticky; top: 0; z-index: 100;
    display: flex; align-items: center; gap: var(--space-4);
    padding: 0 var(--space-6);
    transition: background var(--transition-base), border-color var(--transition-base);
}

.topbar-title {
    font-size: var(--text-lg); font-weight: 700; color: var(--text-primary);
    letter-spacing: -0.01em; flex: 1; min-width: 0;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.topbar-actions { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }

.theme-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%;
    background: transparent; border: 1px solid var(--border-default);
    color: var(--text-secondary); cursor: pointer; position: relative;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}
.theme-toggle:hover { background: var(--color-gray-100); color: var(--text-primary); }

.theme-icon { position: absolute; display: flex; transition: opacity var(--transition-fast), transform var(--transition-fast); }
.theme-icon-moon { opacity: 0; transform: scale(0.6) rotate(-40deg); }
:root[data-theme="dark"] .theme-icon-sun { opacity: 0; transform: scale(0.6) rotate(40deg); }
:root[data-theme="dark"] .theme-icon-moon { opacity: 1; transform: scale(1) rotate(0); }

/* ── User Menu ────────────────────────────── */

.user-menu { position: relative; }

.user-menu-trigger {
    display: flex; align-items: center; gap: var(--space-2);
    background: transparent; border: 1px solid transparent; cursor: pointer;
    padding: 5px 8px 5px 5px; border-radius: var(--radius-lg); font-family: var(--font-sans);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}
.user-menu-trigger:hover { background: var(--color-gray-100); }
.user-menu-trigger[aria-expanded="true"] { background: var(--color-gray-100); border-color: var(--border-default); }

.admin-user-avatar {
    width: 30px; height: 30px; background: var(--color-secondary-subtle);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: var(--text-xs); font-weight: 700; color: var(--color-secondary);
    flex-shrink: 0;
}
.admin-user-avatar-lg { width: 40px; height: 40px; font-size: var(--text-base); }

.user-menu-name { font-size: var(--text-sm); font-weight: 600; color: var(--text-primary); }
.user-menu-caret { color: var(--text-tertiary); transition: transform var(--transition-fast); flex-shrink: 0; }
.user-menu-trigger[aria-expanded="true"] .user-menu-caret { transform: rotate(180deg); }

.user-menu-dropdown {
    display: none; position: absolute; top: calc(100% + 8px); right: 0;
    width: 240px; background: var(--surface-raised); border: 1px solid var(--border-default);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); z-index: 300;
    padding: var(--space-2); overflow: hidden;
}
.user-menu-dropdown.open { display: block; }

.user-menu-header { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-2); }
.user-menu-fullname { font-size: var(--text-sm); font-weight: 600; color: var(--text-primary); }
.user-menu-role { font-size: var(--text-xs); color: var(--text-tertiary); margin-top: 1px; }

.user-menu-divider { height: 1px; background: var(--border-subtle); margin: var(--space-1) var(--space-1); }

.user-menu-item {
    display: flex; align-items: center; gap: var(--space-3);
    padding: 9px var(--space-3); border-radius: var(--radius-md);
    color: var(--text-secondary); text-decoration: none;
    font-size: var(--text-sm); font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.user-menu-item:hover { background: var(--color-gray-100); color: var(--text-primary); text-decoration: none; }
.user-menu-item-danger { color: var(--color-error); }
.user-menu-item-danger:hover { background: var(--color-error-subtle); color: var(--color-error); }

.admin-content { max-width: var(--content-max-width); margin: 0 auto; padding: var(--space-6); flex: 1; width: 100%; }

/* ── Section Header ───────────────────────── */

.section-header { margin-bottom: var(--space-5); }
.section-header h1 { font-size: var(--text-xl); font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; margin-bottom: var(--space-1); }
.section-header p { font-size: var(--text-base); color: var(--text-secondary); }

/* ── Admin Cards — Premium ────────────────── */

.admin-card {
    background: var(--surface); border: 1px solid var(--border-default);
    border-radius: var(--radius-lg); padding: var(--space-6);
    margin-bottom: var(--space-5);
    transition: box-shadow var(--transition-base);
}

.admin-card:hover { box-shadow: var(--shadow-md); }

.admin-card-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: var(--space-5); padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-subtle);
}

.admin-card-header-text { flex: 1; }

.admin-card-title {
    font-size: var(--text-md); font-weight: 600; color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.admin-card-subtitle {
    font-size: var(--text-sm); color: var(--text-tertiary); font-weight: 400;
}

/* ── Stats Cards — Premium with Icons ─────── */

.stats-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4); margin-bottom: var(--space-6);
}

.stat-card {
    background: var(--surface); border: 1px solid var(--border-default);
    border-radius: var(--radius-lg); padding: var(--space-5);
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
    position: relative; overflow: hidden;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-gray-300);
}

.stat-card-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: var(--space-3);
}

.stat-icon-wrap {
    width: 40px; height: 40px; border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
}

.stat-icon-wrap.icon-primary { background: var(--color-primary-subtle); color: var(--color-primary); }
.stat-icon-wrap.icon-secondary { background: var(--color-secondary-subtle); color: var(--color-secondary); }
.stat-icon-wrap.icon-accent { background: var(--color-accent-subtle); color: var(--color-accent); }
.stat-icon-wrap.icon-success { background: var(--color-success-subtle); color: var(--color-success); }
.stat-icon-wrap.icon-warning { background: var(--color-warning-subtle); color: var(--color-warning); }
.stat-icon-wrap.icon-error { background: var(--color-error-subtle); color: var(--color-error); }

.stat-badge {
    font-size: var(--text-xs); font-weight: 500;
    padding: 2px 6px; border-radius: var(--radius-sm);
}

.stat-badge.badge-up { background: var(--color-success-subtle); color: var(--color-success); }
.stat-badge.badge-down { background: var(--color-error-subtle); color: var(--color-error); }
.stat-badge.badge-neutral { background: var(--color-gray-100); color: var(--text-tertiary); }

.stat-value {
    font-size: var(--text-2xl); font-weight: 700; color: var(--text-primary);
    line-height: 1; margin-bottom: var(--space-1); letter-spacing: -0.02em;
}

.stat-label {
    font-size: var(--text-sm); color: var(--text-secondary); font-weight: 500;
    margin-bottom: var(--space-1);
}

.stat-description {
    font-size: var(--text-xs); color: var(--text-tertiary);
}

.stat-trend {
    display: flex; align-items: center; gap: var(--space-1);
    font-size: var(--text-xs); margin-top: var(--space-2);
}

.stat-trend.up { color: var(--color-success); }
.stat-trend.down { color: var(--color-error); }

/* ── Filters ──────────────────────────────── */

.filters-bar {
    display: flex; gap: var(--space-2); margin-bottom: var(--space-5);
    flex-wrap: wrap; align-items: center;
}

.filter-select, .filter-input {
    padding: 7px 10px; border: 1px solid var(--border-default);
    border-radius: var(--radius-md); font-size: var(--text-sm);
    font-family: var(--font-sans); background: var(--surface);
    color: var(--text-primary); transition: border-color var(--transition-fast);
}

.filter-select:focus, .filter-input:focus {
    outline: none; border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.08);
}

.filter-input { min-width: 180px; }

/* ── Data Table ───────────────────────────── */

.table-wrapper { overflow-x: auto; margin: 0 calc(-1 * var(--space-1)); padding: 0 var(--space-1); }

.data-table { width: 100%; border-collapse: collapse; }

.data-table thead th {
    padding: var(--space-2) var(--space-3); text-align: left;
    font-size: var(--text-xs); font-weight: 500; color: var(--text-tertiary);
    text-transform: uppercase; letter-spacing: 0.04em;
    white-space: nowrap; border-bottom: 1px solid var(--border-default);
}

.data-table tbody td {
    padding: var(--space-3); font-size: var(--text-base);
    color: var(--text-primary); border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
}

.data-table tbody tr { transition: background var(--transition-fast); }
.data-table tbody tr:hover { background: var(--color-gray-25); }
.data-table tbody tr:last-child td { border-bottom: none; }

.code-cell { font-family: var(--font-mono); font-weight: 500; font-size: var(--text-sm); letter-spacing: 0.3px; }

/* ── Badges ───────────────────────────────── */

.badge {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 2px 8px; border-radius: var(--radius-sm);
    font-size: var(--text-xs); font-weight: 500;
}

.badge-unused { background: var(--color-accent-subtle); color: #1d4ed8; }
.badge-active { background: var(--color-success-subtle); color: #047857; }
.badge-expired { background: var(--color-error-subtle); color: #b91c1c; }
.badge-secondary { background: var(--color-secondary-subtle); color: var(--color-secondary-hover); }
.badge-primary { background: var(--color-primary-subtle); color: var(--color-primary); }

/* ── Code List ────────────────────────────── */

.code-list {
    background: var(--color-gray-50); border: 1px solid var(--border-default);
    border-radius: var(--radius-md); padding: var(--space-4);
    margin-top: var(--space-5); max-height: 400px; overflow-y: auto;
}

.code-list-title {
    font-size: var(--text-sm); font-weight: 500; color: var(--text-secondary);
    margin-bottom: var(--space-3); display: flex; align-items: center; gap: var(--space-2);
}

.code-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: var(--space-2) var(--space-3); background: var(--surface);
    border: 1px solid var(--border-subtle); border-radius: var(--radius-sm);
    margin-bottom: var(--space-2); font-family: var(--font-mono);
    font-weight: 500; font-size: var(--text-sm);
    transition: border-color var(--transition-fast);
}

.code-item:hover { border-color: var(--border-default); }
.code-item:last-child { margin-bottom: 0; }

.copy-btn {
    padding: 3px 10px; font-size: var(--text-xs); font-weight: 500;
    background: var(--surface); color: var(--text-secondary);
    border: 1px solid var(--border-default); border-radius: var(--radius-sm);
    cursor: pointer; transition: all var(--transition-fast); font-family: var(--font-sans);
}

.copy-btn:hover { background: var(--color-gray-100); }
.copy-btn.copied { background: var(--color-success-subtle); color: var(--color-success); border-color: #a7f3d0; }

.action-buttons { display: flex; gap: var(--space-2); margin-top: var(--space-4); }

/* ── Pagination ───────────────────────────── */

.pagination {
    display: flex; justify-content: center; gap: var(--space-1);
    margin-top: var(--space-5); padding-top: var(--space-4);
    border-top: 1px solid var(--border-subtle);
}

.pagination a {
    padding: 6px 12px; border: 1px solid var(--border-default);
    border-radius: var(--radius-sm); color: var(--text-secondary);
    text-decoration: none; font-size: var(--text-sm); font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination a:hover { background: var(--color-gray-100); text-decoration: none; }
.pagination a.active { background: var(--color-secondary); color: var(--text-inverse); border-color: var(--color-secondary); }

/* ── Login Page ───────────────────────────── */

.login-wrapper {
    min-height: 100vh; display: flex; align-items: center;
    justify-content: center; padding: var(--space-5); background: var(--surface-page);
}

.login-card { width: 100%; max-width: 400px; }

/* ── Confirmation ─────────────────────────── */

.confirmation-card {
    border: 1px solid #a7f3d0; background: var(--color-success-subtle);
    border-radius: var(--radius-lg); padding: var(--space-6);
    text-align: center; margin-bottom: var(--space-5);
}

.confirmation-card .confirm-icon { font-size: 36px; margin-bottom: var(--space-3); }
.confirmation-card .confirm-title { font-size: var(--text-lg); font-weight: 600; color: var(--color-success); margin-bottom: var(--space-2); }

.confirmation-card .confirm-details {
    display: inline-block; text-align: left;
    background: var(--surface); border: 1px solid var(--border-default);
    border-radius: var(--radius-md); padding: var(--space-4) var(--space-5); margin-top: var(--space-4);
}

.confirmation-card .detail-grid { display: grid; grid-template-columns: auto auto; gap: var(--space-2) var(--space-5); font-size: var(--text-base); }
.confirmation-card .detail-label { color: var(--text-tertiary); }
.confirmation-card .detail-value { font-weight: 500; }

/* ── Grid Layouts ─────────────────────────── */

.grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.grid-3col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-5); }

@media (max-width: 768px) {
    .grid-2col, .grid-3col { grid-template-columns: 1fr; }
}

/* ── Package Card (Admin) ─────────────────── */

.package-card {
    background: var(--surface); border: 1px solid var(--border-default);
    border-radius: var(--radius-lg); padding: var(--space-5);
    transition: all var(--transition-base);
    position: relative;
}

.package-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-gray-300); }

.package-card.inactive { opacity: 0.6; }

.package-card-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: var(--space-3);
}

.package-name { font-size: var(--text-md); font-weight: 600; color: var(--text-primary); }
.package-price { font-size: var(--text-lg); font-weight: 700; color: var(--color-secondary); }

.package-meta {
    display: flex; gap: var(--space-4); margin-bottom: var(--space-3);
    font-size: var(--text-sm); color: var(--text-secondary);
}

.package-meta-item { display: flex; align-items: center; gap: var(--space-1); }

.package-description { font-size: var(--text-sm); color: var(--text-tertiary); margin-bottom: var(--space-4); }

.package-actions { display: flex; gap: var(--space-2); }

/* ── Modal ────────────────────────────────── */

.modal-overlay {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.4); z-index: 1000;
    align-items: center; justify-content: center; padding: var(--space-5);
}

.modal-overlay.open { display: flex; }

.modal {
    background: var(--surface); border-radius: var(--radius-xl);
    padding: var(--space-6); max-width: 500px; width: 100%;
    border: 1px solid var(--border-default); box-shadow: var(--shadow-lg);
}

.modal-title { font-size: var(--text-lg); font-weight: 600; margin-bottom: var(--space-5); }

.modal-actions { display: flex; gap: var(--space-2); margin-top: var(--space-5); }

/* ── Empty State ──────────────────────────── */

.empty-state {
    text-align: center; padding: var(--space-12) var(--space-5);
    color: var(--text-tertiary);
}

.empty-state-icon { display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-4); opacity: 0.5; }
.empty-state-title { font-size: var(--text-md); font-weight: 600; color: var(--text-secondary); margin-bottom: var(--space-2); }
.empty-state-text { font-size: var(--text-base); margin-bottom: var(--space-5); }

/* ── Responsive ───────────────────────────── */

@media (max-width: 640px) {
    .container { padding: var(--space-5) var(--space-4); }
    .card { padding: var(--space-6) var(--space-5); }
    .header h1 { font-size: var(--text-xl); }
    .brand-icon { width: 48px; height: 48px; }
    .countdown-time { font-size: 28px; }

    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
    .sidebar-toggle { display: flex; }
    .sidebar-collapse-toggle { display: none; }
    .app-main { margin-left: 0; }
    .topbar { padding: 0 var(--space-4); }
    .user-menu-name { display: none; }
    .topbar-title { font-size: var(--text-base); }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .filters-bar { flex-direction: column; align-items: stretch; }
    .filter-input { min-width: auto; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .stat-card { padding: var(--space-4); }
    .stat-value { font-size: var(--text-xl); }
}