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

:root {
    --bg-dark: #0a0f1d;
    --sidebar-bg: rgba(15, 23, 42, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.3);
    --accent: #a855f7;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    --radius-lg: 20px;
    --radius-md: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.1) 0px, transparent 50%);
    min-height: 100vh;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* Layout */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    width: 100%;
    background: var(--sidebar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.75rem 3rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-content {
    flex: 1;
    padding: 2.5rem 3rem;
    width: 100%;
    max-width: 100%;
}

/* Typography */
h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; }
.text-gradient {
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Nav links */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
}
.nav-logo span span {
    color: var(--primary);
}

.nav-links { 
    list-style: none; 
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-item { margin-bottom: 0; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.6rem 1.2rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

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

.nav-link.active {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 8px 12px -3px var(--primary-glow);
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.stat-label { font-size: 0.75rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.1em; }
.stat-value { font-size: 1.8rem; font-weight: 800; }
.stat-value.total { color: var(--primary); }
.stat-value.paid { color: var(--success); }
.stat-value.balance { color: var(--danger); }

/* Glass Containers (Tables, etc) */
.data-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.table-header { padding: 1.25rem 2rem; border-bottom: 1px solid var(--glass-border); display: flex; justify-content: space-between; align-items: center; }
.table-header h3 { font-size: 1.25rem; font-weight: 700; }

.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th { padding: 6px 12px; font-weight: 600; font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 1px solid var(--glass-border); }
td { padding: 4px 12px; border-bottom: 1px solid var(--glass-border); font-size: 0.85rem; color: var(--text-primary); transition: all 0.2s; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.6rem 1.25rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.88rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    box-shadow: 0 6px 12px -3px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 16px -4px var(--primary-glow);
    filter: brightness(1.1);
}

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-secondary:hover { background: rgba(255, 255, 255, 0.08); border-color: var(--text-secondary); }

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
}
.form-input {
    width: 100%;
    padding: 0.7rem 1.1rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: white;
    outline: none;
    transition: all 0.3s ease;
    font-size: 0.88rem;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    background: rgba(15, 23, 42, 0.8);
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: #0f172a;
    border: 1px solid var(--glass-border);
    padding: 2rem 2.5rem;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 650px;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: modalAppear 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

@keyframes modalAppear {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideIn {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Login Page specifically */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.1) 0px, transparent 50%);
}

.login-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: 3.5rem 2.5rem;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
}

/* Utils & Badges */
.glass-panel { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: var(--radius-lg); }
.badge { padding: 3px 8px; border-radius: 6px; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; border: 1px solid transparent; display: inline-block; }
.badge-paid { background: rgba(16, 185, 129, 0.1); color: var(--success); border-color: rgba(16, 185, 129, 0.15); }
.badge-pending { background: rgba(239, 68, 68, 0.1); color: var(--danger); border-color: rgba(239, 68, 68, 0.15); }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); border-color: rgba(245, 158, 11, 0.15); }

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, rgba(255,255,255,0.03) 25%, rgba(255,255,255,0.08) 37%, rgba(255,255,255,0.03) 63%);
    background-size: 400% 100%;
    animation: skeleton-loading 1.4s ease infinite;
    display: inline-block;
    border-radius: 4px;
}
.skeleton-text {
    height: 12px;
}

@keyframes skeleton-loading {
    0% { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

.fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.spin {
    animation: spin 1s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Status select custom styles */
.status-select {
    appearance: none;
    -webkit-appearance: none;
    outline: none;
    transition: all 0.2s ease;
}

@media (max-width: 1024px) {
    .app-header { padding: 0.75rem 1.5rem; }
    .nav-logo span { display: none; }
    .nav-link span { font-size: 0.85rem; }
    .nav-links { gap: 0.4rem; }
}

@media (max-width: 768px) {
    .nav-link span { display: none; }
    .app-header { padding: 0.75rem 1rem; }
    .main-content { padding: 1.5rem; }
}