:root {
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --success: #10b981;
    --danger: #f43f5e;
    --font-main: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-darker);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Background Gradients */
.background-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    filter: blur(100px);
    opacity: 0.5;
    border-radius: 50%;
    animation: float 20s infinite ease-in-out alternate;
}

.shape-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(59,130,246,0.3) 0%, rgba(0,0,0,0) 70%);
}

.shape-2 {
    bottom: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(139,92,246,0.2) 0%, rgba(0,0,0,0) 70%);
    animation-delay: -5s;
}

.shape-3 {
    top: 40%;
    left: 40%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(16,185,129,0.1) 0%, rgba(0,0,0,0) 70%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 10%) scale(1.1); }
}

/* Glassmorphism utility */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Layout */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.header-stats {
    display: flex;
    gap: 1.5rem;
}

.stat-box {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.search-input {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    width: 300px;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.filter-toggles {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background: rgba(255,255,255,0.1);
}

.filter-btn.active {
    background: var(--accent-blue);
    color: white;
    box-shadow: 0 0 15px rgba(59,130,246,0.4);
}

/* Grid */
.family-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.family-card {
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.family-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.family-card.owes::before {
    background: var(--danger);
}

.family-card.gets::before {
    background: var(--success);
}

.family-card.settled::before {
    background: var(--text-secondary);
}

.family-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

.family-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.family-summary {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.family-summary .label {
    color: var(--text-secondary);
}

.family-total {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.family-total-label {
    font-weight: 500;
}

.amount {
    font-weight: 700;
    font-size: 1.25rem;
}

.amount.positive { color: var(--danger); } /* Owes */
.amount.negative { color: var(--success); } /* Gets */

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    width: 90%;
    max-width: 800px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2rem;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

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

.close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: white;
}

.table-container {
    margin-top: 1.5rem;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    font-size: 0.95rem;
}

tbody tr:hover {
    background: rgba(255,255,255,0.02);
}

/* Responsive */
@media (max-width: 768px) {
    .header { flex-direction: column; align-items: flex-start; }
    .search-panel { flex-direction: column; align-items: stretch; }
    .search-input { width: 100%; }
    .filter-toggles { display: grid; grid-template-columns: repeat(3, 1fr); text-align: center; }
}