/* ═══════════════════════════════════════════════════════════════════════════
   MY EXPENSES — Clean, Simple & Accessible Dark Theme
   Designed for everyone — educated or not — easy to use
   ═══════════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Chakra+Petch:wght@400;600;700&display=swap');

/* ─── Design Tokens ──────────────────────────────────────────────────────── */
:root {
    --bg-primary: #020408;
    --bg-secondary: #0a0d14;
    --bg-card: rgba(16, 22, 34, 0.6);
    --bg-card-hover: rgba(24, 32, 48, 0.8);
    --bg-input: rgba(255, 255, 255, 0.03);
    --bg-input-focus: rgba(0, 242, 255, 0.05);
    --bg-modal-overlay: rgba(0, 0, 0, 0.9);

    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(0, 242, 255, 0.2);
    --border-focus: rgba(0, 242, 255, 0.8);

    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --text-dim: #4a5568;

    /* Accent Colors (Cool & Futuristic) */
    --green: #00ffcc;
    --green-bg: rgba(0, 255, 204, 0.1);
    --blue: #00e5ff;
    --blue-bg: rgba(0, 229, 255, 0.1);
    --amber: #ffcc00;
    --amber-bg: rgba(255, 204, 0, 0.1);
    --rose: #ff0077;
    --rose-bg: rgba(255, 0, 119, 0.1);
    --indigo: #7f7fff;
    --indigo-bg: rgba(127, 127, 255, 0.1);
    --cyan: #00f2ff;
    --cyan-bg: rgba(0, 242, 255, 0.1);
    --violet: #cc00ff;
    --violet-bg: rgba(204, 0, 255, 0.1);
    --orange: #ff9900;
    --orange-bg: rgba(255, 153, 0, 0.1);

    --gradient-primary: linear-gradient(135deg, #00f2ff, #7f7fff);
    --gradient-danger: linear-gradient(135deg, #ff0077, #ff9900);
    --gradient-success: linear-gradient(135deg, #00ffcc, #00e5ff);

    --shadow-neon: 0 0 15px rgba(0, 242, 255, 0.2);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;

    --font-numeric: 'Chakra Petch', sans-serif;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 150ms var(--ease-out);
    --transition-normal: 300ms var(--ease-out);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' style='font-size: 24px;'><text y='24'>💰</text></svg>"), auto;
}

/* Custom cursor for clickable elements */
a, button, .category-chip, .expense-card, .btn, .action-btn {
    cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' style='font-size: 24px;'><text y='24'>💸</text></svg>"), pointer !important;
}

/* Subtle ambient glow - Futuristic neon version */
body::before {
    content: '';
    position: fixed;
    top: -40%;
    left: -40%;
    width: 180%;
    height: 180%;
    background:
        radial-gradient(circle at 25% 25%, rgba(0, 210, 255, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(191, 0, 255, 0.04) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

/* ─── Layout ─────────────────────────────────────────────────────────────── */
.app-container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 40px 80px;
    background: radial-gradient(circle at 50% 0%, rgba(0, 242, 255, 0.03) 0%, transparent 70%);
}

/* ─── Header ─────────────────────────────────────────────────────────────── */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    margin-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.app-logo-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 0 30px rgba(0, 210, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: pulse 3s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 20px rgba(0, 210, 255, 0.3); }
    50% { transform: scale(1.05); box-shadow: 0 0 40px rgba(0, 210, 255, 0.5); }
    100% { transform: scale(1); box-shadow: 0 0 20px rgba(0, 210, 255, 0.3); }
}

.app-logo h1 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.app-logo span {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    user-select: none;
}

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-small {
    padding: 7px 14px;
    font-size: 0.8rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.2);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 30px rgba(0, 210, 255, 0.4);
    filter: brightness(1.1);
}

.btn-outline {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-danger {
    background: var(--gradient-danger);
    color: white;
}

.btn-danger:hover {
    box-shadow: 0 4px 20px rgba(244, 63, 94, 0.3);
}

.btn:active { transform: scale(0.96); }

/* ─── Budget Section ─────────────────────────────────────────────────────── */
.budget-section {
    background: rgba(22, 27, 34, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 242, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.budget-section:hover {
    transform: rotateX(2deg) translateZ(10px);
    border-color: rgba(0, 242, 255, 0.5);
    box-shadow: 0 12px 40px rgba(0, 210, 255, 0.1);
}

.budget-bar {
    height: 14px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.budget-bar-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--gradient-success);
    transition: width 0.8s var(--ease-out), background 0.5s ease;
    width: 0%;
    position: relative;
    box-shadow: 0 0 15px var(--green);
}

.budget-daily-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-top: 20px;
}

.daily-card {
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.daily-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: 0.3s;
}

.daily-card:hover::before { opacity: 1; }

.daily-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-weight: 500;
}

.daily-value {
    display: block;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-numeric);
    letter-spacing: -0.5px;
    margin-top: 5px;
}

/* ─── Stat Cards ─────────────────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

.stat-card:hover {
    border-color: var(--border-focus);
    transform: translateZ(20px) translateY(-5px) rotateX(5deg);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), 0 0 15px rgba(0, 210, 255, 0.1);
}

.stat-card-icon-bg {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.stat-card-icon-bg.green { background: var(--green-bg); color: var(--green); }
.stat-card-icon-bg.blue { background: var(--blue-bg); color: var(--blue); }
.stat-card-icon-bg.amber { background: var(--amber-bg); color: var(--amber); }
.stat-card-icon-bg.rose { background: var(--rose-bg); color: var(--rose); }

.stat-card-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.stat-card-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.stat-card-value {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: var(--font-numeric);
}

/* ─── Content Grid ───────────────────────────────────────────────────────── */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 30px;
}

/* ─── Panel ──────────────────────────────────────────────────────────────── */
.panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    box-shadow: var(--shadow-lg);
}

.panel:hover {
    transform: translateY(-5px) rotateX(2deg);
    border-color: var(--border-hover);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 242, 255, 0.1);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 30px;
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.02);
}

.panel-title {
    font-size: 1.2rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.count-badge {
    background: var(--indigo-bg);
    color: var(--indigo);
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.panel-body { padding: 16px 20px; }

/* ─── Toolbar ────────────────────────────────────────────────────────────── */
.toolbar {
    display: flex;
    gap: 8px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 150px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 10px 14px 10px 36px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    border-color: var(--border-focus);
    background: var(--bg-input-focus);
    box-shadow: 0 0 0 3px rgba(0, 242, 255, 0.1);
}

.search-box input::placeholder { color: var(--text-dim); }

.search-box .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    pointer-events: none;
}

.filter-select, .date-input {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
}

.filter-select:focus, .date-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(0, 242, 255, 0.1);
}

.filter-select option { background: var(--bg-secondary); color: var(--text-primary); }

::-webkit-calendar-picker-indicator { filter: invert(0.7); }

/* ─── Expense List (Card-based) ──────────────────────────────────────────── */
.expense-list {
    max-height: 600px;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.expense-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.2);
    cursor: pointer;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.expense-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 4px; height: 100%;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.expense-card:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: var(--cyan);
    transform: scale(1.02) translateX(10px);
    box-shadow: -10px 10px 30px rgba(0, 0, 0, 0.3);
}

.expense-card:hover::before {
    opacity: 1;
    box-shadow: 0 0 15px var(--cyan);
}

.expense-card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
    background: rgba(0, 242, 255, 0.05);
    border: 1px solid rgba(0, 242, 255, 0.1);
}

.expense-card-body {
    flex: 1;
    min-width: 0;
}

.expense-card-category {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 4px;
    display: block;
}

.expense-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.expense-card-amount {
    font-family: var(--font-numeric);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--cyan);
    text-shadow: 0 0 10px rgba(0, 242, 255, 0.2);
}

.expense-card-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 2px;
}

.expense-card-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.expense-card-date {
    font-size: 0.75rem;
    color: var(--text-dim);
    white-space: nowrap;
}

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

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

.action-btn {
    padding: 8px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.action-btn.delete:hover {
    background: var(--rose-bg);
    color: var(--rose);
}

.cat-icon.food { background: var(--amber-bg); color: var(--amber); }
.cat-icon.travel { background: var(--blue-bg); color: var(--blue); }
.cat-icon.utilities { background: var(--cyan-bg); color: var(--cyan); }
.cat-icon.entertainment { background: var(--violet-bg); color: var(--violet); }
.cat-icon.health { background: var(--green-bg); color: var(--green); }
.cat-icon.shopping { background: var(--rose-bg); color: var(--rose); }
.cat-icon.transport { background: var(--orange-bg); color: var(--orange); }
.cat-icon.education { background: var(--indigo-bg); color: var(--indigo); }
.cat-icon.rent { background: var(--blue-bg); color: var(--blue); }
.cat-icon.other { background: rgba(148, 163, 184, 0.1); color: var(--text-muted); }

/* ─── Category Chips (in form) ───────────────────────────────────────────── */
.category-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.category-chip {
    padding: 7px 14px;
    border-radius: var(--radius-full);
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.category-chip:hover {
    background: var(--indigo-bg);
    border-color: var(--indigo);
    color: var(--indigo);
}

.category-chip.active {
    background: var(--indigo-bg);
    border-color: var(--indigo);
    color: var(--indigo);
}

/* ─── Empty State ────────────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 56px;
    margin-bottom: 14px;
    opacity: 0.5;
}

.empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-size: 1.1rem;
}

.empty-state p {
    font-size: 0.85rem;
}

/* ─── Charts ─────────────────────────────────────────────────────────────── */
.charts-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.chart-container {
    position: relative;
    height: 210px;
    padding: 4px;
}

/* ─── Modal ──────────────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-modal-overlay);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 460px;
    box-shadow: var(--shadow-lg);
    transform: translateY(24px) scale(0.96);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 24px 14px;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

.modal-close {
    background: var(--bg-input);
    border: none;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    transition: all var(--transition-fast);
    font-size: 18px;
}

.modal-close:hover {
    background: var(--rose-bg);
    color: var(--rose);
}

.modal-body { padding: 0 24px 24px; }

/* ─── Form ───────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all var(--transition-fast);
}

.form-input-large {
    font-size: 1.4rem;
    font-weight: 700;
    padding: 16px 18px;
    letter-spacing: -0.3px;
}

.form-input:focus {
    border-color: var(--border-focus);
    background: var(--bg-input-focus);
    box-shadow: 0 0 0 3px rgba(0, 242, 255, 0.15);
}

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

.form-hint {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 8px;
    line-height: 1.5;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.form-actions .btn { flex: 1; }

/* ─── Toast ──────────────────────────────────────────────────────────────── */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 260px;
    transform: translateX(110%);
    animation: toastIn 400ms var(--ease-out) forwards;
}

.toast.success { border-left: 3px solid var(--green); }
.toast.error { border-left: 3px solid var(--rose); }
.toast.info { border-left: 3px solid var(--cyan); }

@keyframes toastIn { to { transform: translateX(0); } }
@keyframes toastOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(110%); opacity: 0; }
}
.toast.removing { animation: toastOut 300ms var(--ease-out) forwards; }

/* ─── Scrollbar ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.15); }

/* ─── Animations ─────────────────────────────────────────────────────────── */
.fade-in { animation: fadeIn 500ms var(--ease-out) forwards; opacity: 0; }
@keyframes fadeIn { to { opacity: 1; } }

.slide-up {
    animation: slideUp 500ms var(--ease-out) forwards;
    opacity: 0;
    transform: translateY(14px);
}
@keyframes slideUp { to { opacity: 1; transform: translateY(0); } }

.delay-1 { animation-delay: 50ms; }
.delay-2 { animation-delay: 100ms; }
.delay-3 { animation-delay: 150ms; }
.delay-4 { animation-delay: 200ms; }

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1100px) {
    .content-grid { grid-template-columns: 1fr; }
    .charts-column { flex-direction: row; }
    .charts-column .panel { flex: 1; }
}

@media (max-width: 768px) {
    .app-container { padding: 12px 14px 40px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .app-header { flex-direction: column; gap: 14px; align-items: stretch; }
    .header-actions { justify-content: stretch; }
    .header-actions .btn { flex: 1; }
    .charts-column { flex-direction: column; }
    .budget-daily-info { grid-template-columns: repeat(2, 1fr); }
    .toolbar { flex-direction: column; }
    .expense-card-actions { opacity: 1; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .budget-daily-info { grid-template-columns: 1fr 1fr; }
    .stat-card { padding: 14px 16px; }
}