/* ===========================
   CSS DESIGN SYSTEM
   FB Expense Tracker
   Dark theme + Glassmorphism
   =========================== */

/* ---------- CSS Variables ---------- */
:root {
    /* Facebook-inspired palette */
    --primary: #1877F2;
    --primary-light: #4599FF;
    --primary-dark: #0D5DC7;
    --primary-glow: rgba(24, 119, 242, 0.35);

    /* Accent colors for categories */
    --accent-ad: #FF6B6B;
    --accent-hire: #51CF66;
    --accent-market: #845EF7;
    --accent-account: #FFA94D;
    --accent-tools: #22B8CF;
    --accent-other: #ADB5BD;

    /* Surfaces */
    --bg-body: #0B0F1A;
    --bg-surface: #111827;
    --bg-card: rgba(17, 24, 39, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --mobile-break: 768px;
    --bg-glass-hover: rgba(255, 255, 255, 0.07);
    --bg-input: rgba(255, 255, 255, 0.06);
    --bg-input-focus: rgba(255, 255, 255, 0.1);

    /* Borders */
    --border: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-focus: var(--primary);

    /* Text */
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --text-accent: var(--primary-light);

    /* Danger */
    --danger: #EF4444;
    --danger-light: #FCA5A5;

    /* Spacing */
    --sidebar-width: 260px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.25s ease;
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Ambient background gradient */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 20%, rgba(24, 119, 242, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(132, 94, 247, 0.06) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 50%, rgba(255, 107, 107, 0.04) 0%, transparent 50%);
    z-index: -1;
    animation: ambientShift 20s ease-in-out infinite alternate;
}

@keyframes ambientShift {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-2%, -2%) rotate(3deg); }
}

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ---------- SIDEBAR ---------- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-slow);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.brand-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
    flex-shrink: 0;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) scaleY(0);
    width: 3px;
    height: 24px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
    transition: transform var(--transition);
}

.nav-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.nav-btn.active {
    background: rgba(24, 119, 242, 0.1);
    color: var(--primary-light);
}

.nav-btn.active::before {
    transform: translateY(-50%) scaleY(1);
}

.nav-btn svg {
    flex-shrink: 0;
    opacity: 0.7;
    transition: opacity var(--transition);
}

.nav-btn.active svg,
.nav-btn:hover svg {
    opacity: 1;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.quick-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.quick-stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.quick-stat-value {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- MOBILE HEADER ---------- */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(17, 24, 39, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 99;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.hamburger {
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    padding: 6px;
}

.hamburger span {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.mobile-add-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    border: none;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--primary-glow);
    transition: all var(--transition);
}

.mobile-add-btn:hover {
    transform: scale(1.1);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
    backdrop-filter: blur(4px);
}

/* ---------- MAIN CONTENT ---------- */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 32px 40px;
    min-height: 100vh;
}

.tab-content {
    display: none;
    animation: fadeSlideIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- PAGE HEADER ---------- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.page-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px var(--primary-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-glow {
    position: relative;
}

.btn-glow::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    z-index: -1;
    opacity: 0;
    filter: blur(12px);
    transition: opacity var(--transition);
}

.btn-glow:hover::after {
    opacity: 0.5;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 10px 16px;
}

.btn-ghost:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(24, 119, 242, 0.05);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #DC2626);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

.btn-icon {
    width: 34px;
    height: 34px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

/* ---------- GLASS CARD ---------- */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
    border-color: var(--border-light);
}

/* ---------- SUMMARY CARDS ---------- */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}

.summary-card {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card-today::before { background: linear-gradient(90deg, var(--primary), var(--primary-light)); }
.card-week::before { background: linear-gradient(90deg, var(--accent-hire), #34d058); }
.card-month::before { background: linear-gradient(90deg, var(--accent-market), #a78bfa); }
.card-all::before { background: linear-gradient(90deg, var(--accent-ad), var(--accent-account)); }

.summary-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-light);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-today .card-icon { background: rgba(24, 119, 242, 0.15); color: var(--primary-light); }
.card-week .card-icon { background: rgba(81, 207, 102, 0.15); color: var(--accent-hire); }
.card-month .card-icon { background: rgba(132, 94, 247, 0.15); color: var(--accent-market); }
.card-all .card-icon { background: rgba(255, 107, 107, 0.15); color: var(--accent-ad); }

.card-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.card-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
}

.card-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-count {
    font-size: 12px;
    color: var(--text-muted);
}

/* ---------- CHARTS ---------- */
.charts-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 16px;
    margin-bottom: 28px;
}

.chart-card {
    padding: 24px;
    min-width: 0;
    overflow: hidden;
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.chart-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.chart-subtitle {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.chart-container {
    position: relative;
    height: 260px;
    min-width: 0;
    width: 100%;
}

.chart-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.chart-container-doughnut {
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-container-bar {
    height: 300px;
}

/* ---------- RECENT SECTION ---------- */
.recent-section {
    margin-bottom: 28px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 400px;
    overflow-y: auto;
}

/* ---------- EXPENSE ITEM ---------- */
.expense-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    border: 1px solid transparent;
    transition: all var(--transition);
    animation: slideIn 0.3s ease;
    min-width: 0;
    flex-wrap: wrap;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.expense-item:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border);
}

.expense-emoji {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.expense-emoji[data-cat="Ad Spend"] { background: rgba(255, 107, 107, 0.12); }
.expense-emoji[data-cat="Hiring"] { background: rgba(81, 207, 102, 0.12); }
.expense-emoji[data-cat="Marketing"] { background: rgba(132, 94, 247, 0.12); }
.expense-emoji[data-cat="Account Purchase"] { background: rgba(255, 169, 77, 0.12); }
.expense-emoji[data-cat="Tools & Software"] { background: rgba(34, 184, 207, 0.12); }
.expense-emoji[data-cat="Other"] { background: rgba(173, 181, 189, 0.12); }

.expense-details {
    flex: 1;
    min-width: 60px;
    overflow: hidden;
}

.expense-cat {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-desc {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.expense-meta {
    text-align: right;
    flex-shrink: 0;
}

.expense-amount {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent-ad);
}

.expense-date {
    font-size: 11px;
    color: var(--text-muted);
}

.expense-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity var(--transition);
    flex-shrink: 0;
}

.expense-item:hover .expense-actions {
    opacity: 1;
}

.expense-actions .btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
}

.expense-actions .btn-icon:hover {
    color: var(--text-primary);
    background: var(--bg-glass-hover);
}

.expense-actions .btn-icon.btn-delete:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

/* ---------- EMPTY STATE ---------- */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    gap: 16px;
    color: var(--text-muted);
    text-align: center;
}

.empty-state svg {
    opacity: 0.3;
}

.empty-state p {
    font-size: 14px;
    max-width: 300px;
}

.empty-state-sm {
    padding: 32px 16px;
    color: var(--text-muted);
    text-align: center;
    font-size: 13px;
}

/* ---------- ADD EXPENSE ---------- */
.add-expense-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    align-items: flex-start;
}

.expense-form {
    padding: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.optional {
    color: var(--text-muted);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    font-size: 12px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    transition: all var(--transition);
    outline: none;
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    background: var(--bg-input-focus);
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-input-sm {
    padding: 8px 12px;
    font-size: 13px;
}

.input-wrapper {
    position: relative;
}

.input-amount {
    display: flex;
    align-items: center;
}

.input-prefix {
    position: absolute;
    left: 16px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-muted);
    z-index: 1;
    pointer-events: none;
}

.input-amount .form-input {
    padding-left: 36px;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.category-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 10px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    border: 1.5px solid var(--border);
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

.category-card:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-light);
    transform: translateY(-1px);
}

.category-option input:checked + .category-card {
    border-color: var(--primary);
    background: rgba(24, 119, 242, 0.1);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.category-emoji {
    font-size: 28px;
    line-height: 1;
}

.category-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.category-option input:checked + .category-card .category-name {
    color: var(--primary-light);
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

/* Quick Stats Panel */
.quick-stats-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.quick-info {
    padding: 20px;
}

.quick-info-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.tips-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tips-list li {
    font-size: 13px;
    color: var(--text-secondary);
    padding-left: 16px;
    position: relative;
    line-height: 1.5;
}

.tips-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--primary-light);
    font-weight: 700;
    font-size: 16px;
}

.today-mini-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.mini-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    text-align: center;
}

.mini-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.mini-value {
    font-size: 18px;
    font-weight: 800;
    color: var(--text-primary);
}

/* ---------- HISTORY FILTERS ---------- */
.filters-bar {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    padding: 16px 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 140px;
}

.filter-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.history-date-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.date-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.date-group-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.date-group-total {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-ad);
}

/* ---------- ANALYTICS ---------- */
.analytics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.analytics-full {
    grid-column: 1 / -1;
}

/* Top Days */
.top-days-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.top-day-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--bg-glass);
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.top-day-item:hover {
    background: var(--bg-glass-hover);
}

.top-day-rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    flex-shrink: 0;
}

.rank-1 { background: linear-gradient(135deg, #FFD700, #FFA500); color: #1a1a1a; }
.rank-2 { background: linear-gradient(135deg, #C0C0C0, #A0A0A0); color: #1a1a1a; }
.rank-3 { background: linear-gradient(135deg, #CD7F32, #A0522D); color: white; }
.rank-other { background: var(--bg-glass-hover); color: var(--text-muted); }

.top-day-info {
    flex: 1;
}

.top-day-date {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.top-day-count {
    font-size: 11px;
    color: var(--text-muted);
}

.top-day-amount {
    font-size: 15px;
    font-weight: 700;
    color: var(--accent-ad);
}

/* ---------- TOAST ---------- */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    animation: toastIn 0.4s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 250px;
}

.toast.toast-success {
    border-left: 3px solid var(--accent-hire);
}

.toast.toast-error {
    border-left: 3px solid var(--danger);
}

.toast.toast-info {
    border-left: 3px solid var(--primary);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
}

/* ---------- MODAL ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 150;
    display: none;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-card {
    width: 90%;
    max-width: 420px;
    padding: 28px;
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.modal-message {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* ---------- SELECT STYLING ---------- */
select.form-input {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%236B7280' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ---------- DATE INPUT ---------- */
input[type="date"].form-input {
    color-scheme: dark;
}

/* ==================
   BOTTOM NAVIGATION
   ================== */

.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    z-index: 100;
    justify-content: space-around;
    align-items: center;
    padding: 0 8px;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.3px;
    min-width: 56px;
    -webkit-tap-highlight-color: transparent;
    position: relative;
}

.bottom-nav-item svg {
    transition: all var(--transition);
    opacity: 0.6;
}

.bottom-nav-item.active {
    color: var(--primary-light);
}

.bottom-nav-item.active svg {
    opacity: 1;
    stroke: var(--primary-light);
}

.bottom-nav-item.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 0 0 2px 2px;
}

.bottom-nav-add-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
    margin-top: -16px;
    transition: all var(--transition);
}

.bottom-nav-item:active .bottom-nav-add-icon {
    transform: scale(0.92);
}

.bottom-nav-item[data-tab="add"].active .bottom-nav-add-icon {
    box-shadow: 0 4px 24px rgba(24, 119, 242, 0.5);
}

/* ==================
   RESPONSIVE
   ================== */

@media (max-width: 1200px) {
    .summary-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }

    .add-expense-layout {
        grid-template-columns: 1fr;
    }

    .quick-stats-panel {
        flex-direction: row;
    }

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

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.active {
        display: block;
    }

    .mobile-header {
        display: flex;
    }

    /* Show bottom nav on mobile */
    .bottom-nav {
        display: flex;
    }

    /* Hide hamburger + button in header since we have bottom nav */
    .mobile-add-btn {
        display: none;
    }

    .main-content {
        margin-left: 0;
        padding: 72px 16px 88px;
        padding-bottom: calc(88px + env(safe-area-inset-bottom, 0));
    }

    .summary-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .page-title {
        font-size: 22px;
    }

    .page-subtitle {
        font-size: 13px;
    }

    .card-value {
        font-size: 20px;
    }

    .card-label {
        font-size: 11px;
    }

    .card-count {
        font-size: 11px;
    }

    .summary-card {
        padding: 14px;
        gap: 12px;
    }

    .card-icon {
        width: 40px;
        height: 40px;
    }

    .expense-form {
        padding: 20px;
    }

    .category-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .category-card {
        padding: 14px 8px;
    }

    .category-emoji {
        font-size: 24px;
    }

    .category-name {
        font-size: 11px;
    }

    /* Filters: horizontal scroll on mobile */
    .filters-bar {
        gap: 10px;
        padding: 14px 16px;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .filters-bar::-webkit-scrollbar {
        display: none;
    }

    .filter-group {
        min-width: 160px;
        flex: 0 0 auto;
    }

    .quick-stats-panel {
        flex-direction: column;
    }

    /* Always show actions on touch devices */
    .expense-actions {
        opacity: 1;
    }

    /* Toast above bottom nav */
    .toast-container {
        left: 16px;
        right: 16px;
        bottom: calc(76px + env(safe-area-inset-bottom, 0));
    }

    .toast {
        min-width: auto;
    }

    .chart-container {
        height: 220px;
    }

    .chart-container-bar {
        height: 250px;
    }

    /* Expense items */
    .expense-item {
        gap: 10px;
        padding: 12px;
    }

    .expense-emoji {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }

    .expense-amount {
        font-size: 15px;
    }

    .expense-meta {
        min-width: auto;
    }

    /* Larger touch targets for action buttons */
    .expense-actions .btn-icon {
        width: 36px;
        height: 36px;
    }

    /* Glass card padding */
    .glass-card {
        padding: 18px;
    }

    /* Charts grid */
    .charts-grid {
        gap: 12px;
        margin-bottom: 16px;
    }

    .chart-card {
        padding: 18px;
    }

    /* Recent section */
    .recent-section {
        margin-bottom: 16px;
    }

    .recent-list {
        max-height: 350px;
    }

    /* Page header */
    .page-header {
        margin-bottom: 20px;
        gap: 12px;
    }

    /* Dashboard add button: smaller on mobile */
    #dashboard-add-btn {
        padding: 8px 16px;
        font-size: 13px;
    }

    /* History filter improvements */
    .clear-filters-btn,
    #clear-filters-btn {
        align-self: flex-end;
        min-width: auto;
        flex: 0 0 auto;
    }

    /* Analytics */
    .analytics-grid {
        gap: 12px;
    }

    /* Modal */
    .modal-card {
        width: 92%;
        padding: 24px;
    }
}

/* ── Small mobile (≤500px) ── */
@media (max-width: 500px) {
    .main-content {
        padding: 68px 12px 84px;
        padding-bottom: calc(84px + env(safe-area-inset-bottom, 0));
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .page-title {
        font-size: 20px;
    }

    /* Summary cards: compact 2-column */
    .summary-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .summary-card {
        padding: 12px;
        gap: 10px;
        flex-direction: column;
        align-items: flex-start;
    }

    .summary-card .card-icon {
        width: 36px;
        height: 36px;
    }

    .summary-card .card-icon svg {
        width: 18px;
        height: 18px;
    }

    .card-value {
        font-size: 20px;
    }

    /* Form actions */
    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .btn {
        width: 100%;
        justify-content: center;
        padding: 14px 20px;
        font-size: 15px;
    }

    /* Category grid: 3 columns still but tighter */
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .category-card {
        padding: 12px 6px;
        gap: 4px;
    }

    .category-emoji {
        font-size: 22px;
    }

    .category-name {
        font-size: 10px;
    }

    /* Expense items: grid layout for neat stacking */
    .expense-item {
        display: grid;
        grid-template-areas:
            "emoji details meta"
            ". actions actions";
        grid-template-columns: auto 1fr auto;
        gap: 6px 10px;
        align-items: center;
        padding: 12px;
    }

    .expense-emoji {
        grid-area: emoji;
    }

    .expense-details {
        grid-area: details;
        min-width: 0;
    }

    .expense-meta {
        grid-area: meta;
        text-align: right;
    }

    .expense-actions {
        grid-area: actions;
        justify-content: flex-end;
        opacity: 1 !important;
        margin-top: 2px;
        border-top: 1px solid rgba(255, 255, 255, 0.04);
        padding-top: 6px;
    }

    .expense-cat {
        font-size: 13px;
    }

    .expense-desc {
        font-size: 11px;
    }

    .expense-amount {
        font-size: 14px;
    }

    .expense-date {
        font-size: 10px;
    }

    .section-header {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }

    .chart-header {
        flex-direction: column;
        gap: 4px;
        align-items: flex-start;
    }

    .chart-container {
        height: 200px;
    }

    .input-amount .form-input {
        font-size: 20px;
    }

    .glass-card {
        padding: 14px;
        border-radius: var(--radius-md);
    }

    /* Date group headers */
    .date-group-header {
        padding: 8px 12px;
    }

    .date-group-label {
        font-size: 12px;
    }

    .date-group-total {
        font-size: 13px;
    }

    /* Quick info panel */
    .quick-info {
        padding: 16px;
    }

    .quick-info-title {
        font-size: 14px;
        margin-bottom: 10px;
    }

    .tips-list li {
        font-size: 12px;
    }

    /* Top days */
    .top-day-item {
        padding: 10px 12px;
        gap: 10px;
    }

    .top-day-rank {
        width: 26px;
        height: 26px;
        font-size: 11px;
    }

    .top-day-date {
        font-size: 12px;
    }

    .top-day-amount {
        font-size: 14px;
    }

    /* Filter tweaks */
    .filter-group {
        min-width: 140px;
    }

    .form-input-sm {
        padding: 10px 12px;
        font-size: 14px;
    }

    /* Export button full width */
    #export-csv-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ── Extra small (≤360px) ── */
@media (max-width: 360px) {
    .main-content {
        padding: 64px 8px 80px;
        padding-bottom: calc(80px + env(safe-area-inset-bottom, 0));
    }

    .mobile-header {
        padding: 0 12px;
        height: 56px;
    }

    .mobile-brand {
        font-size: 16px;
    }

    .summary-card {
        padding: 10px;
    }

    .card-icon {
        width: 32px;
        height: 32px;
    }

    .card-icon svg {
        width: 16px;
        height: 16px;
    }

    .card-value {
        font-size: 18px;
    }

    .card-label {
        font-size: 10px;
    }

    .expense-emoji {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .page-title {
        font-size: 18px;
    }

    .bottom-nav {
        height: 58px;
    }

    .bottom-nav-item {
        font-size: 9px;
        padding: 6px 8px;
        min-width: 48px;
    }

    .bottom-nav-add-icon {
        width: 40px;
        height: 40px;
        margin-top: -14px;
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Touch & Interaction Enhancements ── */
@media (hover: none) and (pointer: coarse) {
    /* Always show action buttons on touch devices */
    .expense-actions {
        opacity: 1 !important;
    }

    /* Larger tap targets */
    .btn {
        min-height: 44px;
    }

    .btn-icon {
        min-width: 44px;
        min-height: 44px;
    }

    .nav-btn {
        min-height: 44px;
    }

    /* Remove hover effects that cause sticky states on mobile */
    .summary-card:hover {
        transform: none;
    }

    .category-card:hover {
        transform: none;
    }

    .btn-primary:hover {
        transform: none;
    }

    /* Active states for touch feedback */
    .summary-card:active {
        transform: scale(0.98);
    }

    .category-card:active {
        transform: scale(0.97);
        background: var(--bg-glass-hover);
    }

    .btn-primary:active {
        transform: scale(0.97);
    }

    .expense-item:active {
        background: var(--bg-glass-hover);
    }

    .bottom-nav-item:active svg {
        transform: scale(0.9);
    }
}

/* ── Landscape mobile ── */
@media (max-height: 500px) and (orientation: landscape) {
    .main-content {
        padding-top: 64px;
    }

    .summary-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .bottom-nav {
        height: 52px;
    }

    .bottom-nav-add-icon {
        width: 38px;
        height: 38px;
        margin-top: -10px;
    }

    .bottom-nav-item span {
        display: none;
    }
}