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

:root {
    --bg: #ffffff;
    --fg: #0f172a;
    --card: #ffffff;
    --card-fg: #0f172a;
    --muted: #f1f5f9;
    --muted-fg: #64748b;
    --border: #e2e8f0;
    --input: #e2e8f0;
    --primary: #1e293b;
    --primary-fg: #f8fafc;
    --secondary: #f1f5f9;
    --secondary-fg: #1e293b;
    --destructive: #ef4444;
    --accent: #f1f5f9;
    --accent-fg: #1e293b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
}

.dark {
    --bg: #0a0f1a;
    --fg: #f1f5f9;
    --card: #141b2d;
    --card-fg: #f1f5f9;
    --muted: #1e293b;
    --muted-fg: #94a3b8;
    --border: rgba(255,255,255,0.08);
    --input: rgba(255,255,255,0.1);
    --primary: #3b82f6;
    --primary-fg: #ffffff;
    --secondary: #1e293b;
    --secondary-fg: #e2e8f0;
    --destructive: #f87171;
    --accent: #1e293b;
    --accent-fg: #f8fafc;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -4px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--fg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---- Cards ---- */
.card {
    background-color: var(--card);
    color: var(--card-fg);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.card:hover {
    box-shadow: var(--shadow-md);
}
a.card:hover {
    border-color: var(--primary);
    transform: translateY(-1px);
}

/* Stat cards with colored top accent */
.stat-card {
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 0.75rem 0.75rem 0 0;
}
.stat-card--red::before { background: linear-gradient(90deg, #ef4444, #f87171); }
.stat-card--green::before { background: linear-gradient(90deg, #22c55e, #4ade80); }
.stat-card--blue::before { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.stat-card--yellow::before { background: linear-gradient(90deg, #eab308, #facc15); }

/* ---- Buttons ---- */
.btn-primary {
    background-color: var(--primary);
    color: var(--primary-fg);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.15s ease;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
    opacity: 0.9;
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-destructive {
    background-color: var(--destructive);
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.15s ease;
}
.btn-destructive:hover { opacity: 0.9; }

.btn-ghost {
    background: transparent;
    color: var(--fg);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.15s ease;
}
.btn-ghost:hover { background-color: var(--muted); }

.btn-outline {
    border: 1px solid var(--border);
    background: transparent;
    color: var(--fg);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.15s ease;
}
.btn-outline:hover {
    background-color: var(--muted);
    border-color: var(--muted-fg);
}

.btn-success {
    background-color: #22c55e;
    color: #fff;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.15s ease;
    box-shadow: var(--shadow-sm);
}
.btn-success:hover {
    background-color: #16a34a;
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

/* ---- Inputs ---- */
.input-field {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background-color: var(--bg);
    color: var(--fg);
    font-size: 0.875rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

/* ---- Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}
.badge-secondary { background-color: var(--secondary); color: var(--secondary-fg); }
.badge-destructive { background-color: var(--destructive); color: #fff; }
.badge-outline { border: 1px solid var(--border); color: var(--fg); }
.badge-success { background-color: rgba(34,197,94,0.15); color: #22c55e; }
.badge-warning { background-color: rgba(234,179,8,0.15); color: #eab308; }

/* ---- Credit card visual ---- */
.credit-card-visual {
    border-radius: 0.75rem;
    padding: 1.5rem;
    height: 12rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    color: #fff;
    box-shadow: 0 8px 25px -5px rgba(0,0,0,0.3);
}
.credit-card-visual::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}
.credit-card-visual::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -20%;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}

/* ---- Progress bar ---- */
.progress-bar {
    height: 0.5rem;
    border-radius: 9999px;
    background-color: var(--muted);
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.5s ease;
    background-image: linear-gradient(90deg, currentColor, currentColor);
}

/* ---- Dialog/Modal ---- */
dialog {
    border: none;
    border-radius: 0.75rem;
    padding: 0;
    background-color: var(--card);
    color: var(--card-fg);
    max-width: 32rem;
    width: 90%;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.4);
}
dialog::backdrop {
    background-color: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
}

/* ---- Toast ---- */
.toast {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 9999;
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
    animation-fill-mode: forwards;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}
.toast-success { background-color: #065f46; color: #d1fae5; border-left: 3px solid #22c55e; }
.toast-error { background-color: #991b1b; color: #fecaca; border-left: 3px solid #ef4444; }

@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }

/* ---- Sidebar ---- */
.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.15s;
    color: var(--muted-fg);
}
.nav-link:hover {
    background-color: var(--muted);
    color: var(--fg);
}
.nav-link.active {
    background-color: rgba(59,130,246,0.1);
    color: #3b82f6;
    font-weight: 500;
}

/* ---- Table ---- */
table { width: 100%; border-collapse: collapse; }
th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted-fg);
    border-bottom: 1px solid var(--border);
}
td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}
tbody tr { transition: background-color 0.1s ease; }
tbody tr:hover { background-color: var(--muted); }
tfoot td { border-bottom: none; }

/* ---- Tabs ---- */
.tab-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    color: var(--muted-fg);
    cursor: pointer;
    transition: all 0.15s ease;
}
.tab-btn:hover { color: var(--fg); }
.tab-btn.active { border-bottom-color: var(--primary); color: var(--fg); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ---- Alert cards ---- */
.alert-card {
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    border: 1px solid;
}
.alert-card--warning {
    border-color: rgba(234,179,8,0.3);
    background: linear-gradient(135deg, rgba(234,179,8,0.06), rgba(234,179,8,0.02));
}
.alert-card--success {
    border-color: rgba(34,197,94,0.3);
    background: linear-gradient(135deg, rgba(34,197,94,0.06), rgba(34,197,94,0.02));
}
.alert-card--danger {
    border-color: rgba(239,68,68,0.3);
    background: linear-gradient(135deg, rgba(239,68,68,0.06), rgba(239,68,68,0.02));
}
.alert-card--info {
    border-color: rgba(59,130,246,0.3);
    background: linear-gradient(135deg, rgba(59,130,246,0.06), rgba(59,130,246,0.02));
}

/* ---- Help tooltip ---- */
.help-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--muted);
    color: var(--muted-fg);
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    position: relative;
    vertical-align: middle;
    margin-left: 4px;
    transition: all 0.15s ease;
}
.help-btn:hover {
    background: var(--primary);
    color: var(--primary-fg);
    border-color: var(--primary);
}
.help-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--card);
    color: var(--card-fg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.75rem;
    font-size: 0.75rem;
    font-weight: 400;
    line-height: 1.5;
    width: 250px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.25);
    z-index: 100;
    text-align: left;
}
.help-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border);
}
.help-btn:hover .help-tooltip,
.help-btn:focus .help-tooltip { display: block; }

/* ---- Section headers ---- */
.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-title .icon {
    width: 20px;
    height: 20px;
    color: var(--muted-fg);
}

/* ---- Empty states ---- */
.empty-state {
    text-align: center;
    padding: 2rem 1.5rem;
    color: var(--muted-fg);
}
.empty-state p { margin-bottom: 1rem; }

/* ---- Divider ---- */
.divider {
    border-top: 1px solid var(--border);
    margin: 1rem 0;
}

/* ---- Smooth scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--muted-fg); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg); }

/* ---- Amount colors ---- */
.amount-red { color: #ef4444; }
.amount-green { color: #22c55e; }
.amount-yellow { color: #eab308; }
.amount-muted { color: var(--muted-fg); }

/* ---- Animations ---- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-in {
    animation: fadeInUp 0.3s ease forwards;
}