:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --success-color: #4ade80;
    --danger-color: #f87171;
    --warning-color: #fbbf24;
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
        radial-gradient(at 98% 1%, rgba(74, 222, 128, 0.15) 0px, transparent 50%);
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    margin-bottom: 3rem;
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--accent-color), var(--success-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
}

/* Navigation Styles */
.main-nav {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-btn {
    text-decoration: none;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    border: 1px solid transparent;
    transition: all 0.2s;
    font-weight: 600;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: rgba(56, 189, 248, 0.2);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-card.balance .stat-value {
    color: var(--accent-color);
}

.stat-card.income .stat-value {
    color: var(--success-color);
}

.stat-card.expense .stat-value {
    color: var(--danger-color);
}

.main-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
}

@media (max-width: 850px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

select,
input,
textarea {
    width: 100%;
    padding: 0.75rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s;
}

select:focus,
input:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent-color);
    color: #0f172a;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.transactions-list {
    margin-top: 1rem;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.transaction-item:last-child {
    border-bottom: none;
}

.t-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.t-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.t-amount {
    font-weight: 700;
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 0.5rem;
}

.badge-entree_foot {
    background: rgba(74, 222, 128, 0.2);
    color: #4ade80;
}

.badge-entree_virtual {
    background: rgba(56, 189, 248, 0.2);
    color: #38bdf8;
}

.badge-sortie_foot {
    background: rgba(248, 113, 113, 0.2);
    color: #f87171;
}

.badge-sortie_virtual {
    background: rgba(251, 146, 60, 0.2);
    color: #fb923c;
}

.badge-depense {
    background: rgba(255, 255, 255, 0.1);
    color: #94a3b8;
}

.badge-business {
    background: rgba(74, 222, 128, 0.2);
    color: #4ade80;
}

.badge-sortie_business {
    background: rgba(248, 113, 113, 0.2);
    color: #f87171;
}