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

:root {
    /* Ultra-Premium Midnight / Indigo Palette */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --primary-glow: rgba(79, 70, 229, 0.4);
    
    --secondary: #64748b;
    --accent: #ec4899;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    /* Dark Mode Sidebar */
    --sidebar-bg: #0b0f19;
    --sidebar-text: #94a3b8;
    --sidebar-active: #ffffff;
    --sidebar-active-bg: rgba(79, 70, 229, 0.15);
    
    /* Light Mode Content */
    --background: #f1f5f9;
    --card-bg: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 25px -3px rgb(0 0 0 / 0.08), 0 4px 10px -4px rgb(0 0 0 / 0.08);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --glass: rgba(255, 255, 255, 0.85);
    --glass-blur: blur(16px);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    font-size: 13.5px; /* Tighter pro look */
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.15rem; }

/* Layout */
.app-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

@media (max-width: 1024px) {
    .app-container {
        display: block;
    }
}

/* Sidebar */
.sidebar {
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    border-right: 1px solid rgba(255,255,255,0.05);
    z-index: 1000;
    transition: transform 0.3s ease;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 3.5rem;
    padding: 0 0.5rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
    font-size: 1.25rem;
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: white;
    letter-spacing: -0.5px;
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    color: var(--sidebar-text);
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-menu a i {
    font-size: 1.3rem;
    transition: transform 0.2s;
}

.nav-menu a:hover {
    background-color: rgba(255,255,255,0.05);
    color: white;
}

.nav-menu a:hover i {
    transform: translateX(3px);
}

.nav-menu a.active {
    background: linear-gradient(90deg, rgba(79, 70, 229, 0.2), transparent);
    color: white;
    border-left: 3px solid var(--primary);
    border-radius: 0 12px 12px 0;
}

.nav-menu a.active i {
    color: var(--primary);
}

/* Header */
.main-content {
    padding: 0;
    width: 100%;
    overflow-x: hidden;
}

.top-bar {
    padding: 0 3rem;
    background: var(--glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    right: 0;
    width: calc(100% - 280px); /* Sidebar width */
    z-index: 1001;
    height: 70px;
    transition: width 0.3s ease;
}

@media (max-width: 1024px) {
    .top-bar {
        width: 100%;
    }
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.75rem;
    color: var(--text);
    cursor: pointer;
}

.page-content {
    padding: 3rem;
    padding-top: calc(70px + 3rem); /* Header height + gap */
    max-width: 1600px;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    margin-bottom: 2rem;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(248, 250, 252, 0.5);
}

.card-body {
    padding: 2rem;
}

/* Dashboard Grids */
.dashboard-main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

@media(min-width: 1024px) {
    .dashboard-main-grid {
        grid-template-columns: 2fr 1fr;
    }
}

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

@media(min-width: 1200px) {
    .calendar-main-grid {
        grid-template-columns: 1fr 350px;
    }
}

/* Stats */
/* Primary Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 2rem;
    border-radius: 24px;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    font-size: 0.95rem;
    text-decoration: none;
    line-height: 1;
}

.btn i {
    font-size: 1.15rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-secondary {
    background: white;
    border-color: var(--border);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--background);
    border-color: var(--text-muted);
}

.btn-danger {
    background: #fff1f2;
    color: var(--danger);
    border-color: #fecaca;
}

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

/* Tables */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 0.5rem;
    min-width: 800px; /* Forces scroll on mobile */
}

th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
}

td {
    padding: 1.25rem 1.5rem;
    background: white;
    vertical-align: middle;
    transition: background 0.2s;
}

tbody tr:hover td {
    background: #f8fafc;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
}

input, select, textarea {
    width: 100%;
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background-color: #f8fafc;
    font-size: 1rem;
    transition: all 0.2s;
    font-family: inherit;
    color: var(--text);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    background-color: white;
    box-shadow: 0 0 0 4px var(--primary-glow);
}

/* Badges */
.badge {
    padding: 0.4rem 0.85rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-block;
}

.badge-paid, .badge-success { background: #dcfce7; color: #166534; }
.badge-unpaid, .badge-danger { background: #fee2e2; color: #991b1b; }
.badge-pending, .badge-warning { background: #fef3c7; color: #92400e; }

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Mobile Responsiveness */
@media (max-width: 1024px) {
    .app-container {
        display: block;
    }

    .sidebar {
        position: fixed;
        left: -300px;
        width: 280px;
        box-shadow: var(--shadow-2xl);
        z-index: 1050;
    }

    .sidebar.open {
        left: 0;
    }

    .sidebar .logo-section {
        display: none !important;
    }

    .card-body {
        padding: 1.25rem !important;
    }
    
    .card-header {
        padding: 1rem 1.25rem !important;
    }

    .menu-toggle {
        display: block;
    }

    .top-bar {
        padding: 1rem 1.5rem;
    }

    .page-content {
        padding: 1rem;
        padding-top: calc(70px + 1rem); /* Account for fixed top bar height + gap */
    }

    @media (max-width: 480px) {
        .page-content {
            padding: 0.75rem;
            padding-top: calc(70px + 0.75rem);
        }
        .card-body {
            padding: 1rem !important;
        }
        .card-header {
            padding: 1rem !important;
        }
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .card-header .btn {
        width: 100%;
    }
    
    h1 {
        font-size: 2rem !important;
    }
}

/* Bottom Navigation */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.05);
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
}

.bottom-nav-inner {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 65px;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--text-muted);
    text-decoration: none;
    flex: 1;
    height: 100%;
    transition: all 0.2s ease;
}

.bottom-nav-item i {
    font-size: 1.5rem;
}

.bottom-nav-item span {
    font-size: 0.65rem;
    font-weight: 600;
}

.bottom-nav-item.active {
    color: var(--primary);
}

.bottom-nav-item.active i {
    font-weight: 800;
}

@media (max-width: 768px) {
    .bottom-nav {
        display: block;
    }
    
    .page-content {
        padding-bottom: calc(65px + env(safe-area-inset-bottom) + 1.5rem);
    }

    .menu-toggle {
        display: none !important;
    }
    
    .desktop-date {
        display: none !important;
    }
    
    .mobile-logo-top {
        display: flex !important;
    }

    .profile-details {
        display: none !important;
    }
}

/* Reusable Layout Utilities */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2.5rem;
    gap: 1.5rem;
}

.page-header-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.responsive-grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.item-row-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 100px 50px;
    gap: 1rem;
    margin-bottom: 1rem;
}

.mobile-label, .mobile-label-inline {
    display: none;
}
.mobile-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.profit-value {
    font-size: 3rem;
}

@media (max-width: 768px) {
    .profit-value {
        font-size: 2rem !important;
    }
}

@media (max-width: 768px) {
    .item-row-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        padding: 1.25rem;
        background: #f8fafc;
        border-radius: 16px;
        border: 1px solid var(--border);
        margin-bottom: 1.5rem;
    }
    
    .mobile-label {
        display: block;
    }

    .mobile-label-inline {
        display: inline !important;
    }

    .item-row-grid .form-group {
        margin-bottom: 0;
    }
    
    .item-row-grid div:last-child {
        padding-bottom: 0 !important;
        margin-top: 1rem !important;
        width: 100% !important;
        height: auto !important;
    }
    
    .item-row-grid div:last-child .btn {
        width: 100% !important;
        height: auto !important;
        padding: 0.75rem !important;
        display: flex !important;
    }

    .table-to-cards thead {
        display: none;
    }
    .table-to-cards tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid var(--border);
        border-radius: 16px;
        background: white;
        padding: 0.5rem 0;
        box-shadow: var(--shadow-sm);
    }
    .table-to-cards td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 1.25rem;
        border-bottom: 1px solid var(--border);
        text-align: right;
    }
    .table-to-cards td:last-child {
        border-bottom: none;
    }
    .table-to-cards td::before {
        content: attr(data-label);
        font-weight: 700;
        color: var(--text-muted);
        font-size: 0.75rem;
        text-transform: uppercase;
        margin-right: 1rem;
        text-align: left;
    }
}

@media (min-width: 1024px) {
    .responsive-grid-2 {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
    }
    
    .page-header-actions {
        width: 100%;
    }
    
    .page-header-actions .btn {
        flex: 1;
        justify-content: center;
    }
}

/* Utilities */
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1040;
}

.overlay.active {
    display: block;
}

@media print {
    .sidebar, .top-bar, .btn, .logout-form, .menu-toggle {
        display: none !important;
    }
    .app-container {
        display: block;
    }
    .page-content {
        padding: 0;
    }
    .card {
        border: none;
        box-shadow: none;
    }
}