@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Sarabun:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
    --font-primary: 'Outfit', 'Sarabun', sans-serif;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --glass-bg: rgba(30, 41, 59, 0.45);
    --glass-bg-hover: rgba(30, 41, 59, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.03);
    
    /* System Colors */
    --color-primary: #6366f1; /* Indigo */
    --color-primary-hover: #4f46e5;
    --color-secondary: #06b6d4; /* Cyan */
    --color-success: #10b981; /* Emerald */
    --color-warning: #f59e0b; /* Amber */
    --color-danger: #ef4444; /* Rose */
    --color-info: #3b82f6; /* Blue */
    --color-purple: #a855f7;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --sidebar-width: 280px;
    --border-radius-sm: 8px;
    --border-radius-md: 14px;
    --border-radius-lg: 20px;
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-primary);
}

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Background Ambient Blobs */
.bg-blob {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.2;
    z-index: -1;
    pointer-events: none;
}

.blob-1 {
    background: var(--color-primary);
    top: -10%;
    left: -10%;
    animation: float 20s infinite alternate;
}

.blob-2 {
    background: var(--color-secondary);
    bottom: -10%;
    right: -10%;
    animation: float 25s infinite alternate-reverse;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 80px) scale(1.1); }
}

/* Glassmorphism utility */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-md);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.glass-panel:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

/* Main Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-right: 1px solid var(--glass-border);
    z-index: 10;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.sidebar-logo svg {
    width: 36px;
    height: 36px;
    color: var(--color-secondary);
}

.sidebar-logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-logo span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-secondary);
    display: block;
    margin-top: -2px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.2rem;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: 1px solid transparent;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-speed);
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.25) 0%, rgba(6, 182, 212, 0.15) 100%);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.15);
}

.nav-item.active svg {
    color: var(--color-secondary);
    transform: scale(1.1);
}

.sidebar-footer {
    border-top: 1px solid var(--glass-border);
    padding-top: 1.5rem;
    margin-top: 1.5rem;
}

.admin-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.admin-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
}

.admin-info p {
    font-size: 0.75rem;
    color: var(--color-success);
    display: flex;
    align-items: center;
    gap: 4px;
}

.admin-info p::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-success);
    display: inline-block;
}

.btn-logout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.btn-logout:hover {
    background: var(--color-danger);
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

/* Main Content Area */
.main-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.topbar {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.page-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.system-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Main Screen View Sections */
.content-section {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
    display: none; /* Controlled by JS */
    animation: fadeIn var(--transition-speed) ease;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dashboard Cards Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--color-primary);
}

.metric-card.success::before { background: var(--color-success); }
.metric-card.warning::before { background: var(--color-warning); }
.metric-card.danger::before { background: var(--color-danger); }
.metric-card.info::before { background: var(--color-info); }
.metric-card.purple::before { background: var(--color-purple); }

.metric-info h3 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

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

.metric-icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.metric-card.primary .metric-icon-box { background: rgba(99, 102, 241, 0.15); color: var(--color-primary); }
.metric-card.success .metric-icon-box { background: rgba(16, 185, 129, 0.15); color: var(--color-success); }
.metric-card.warning .metric-icon-box { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); }
.metric-card.danger .metric-icon-box { background: rgba(239, 68, 68, 0.15); color: var(--color-danger); }
.metric-card.info .metric-icon-box { background: rgba(59, 130, 246, 0.15); color: var(--color-info); }
.metric-card.purple .metric-icon-box { background: rgba(168, 85, 247, 0.15); color: var(--color-purple); }

.metric-icon-box svg {
    width: 24px;
    height: 24px;
}

/* Dashboard Sections Layout */
.dashboard-layout-row {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 1100px) {
    .dashboard-layout-row {
        grid-template-columns: 1fr;
    }
}

.section-card {
    padding: 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--glass-border);
}

.section-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.action-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Search and Inputs */
.search-wrapper {
    position: relative;
    flex-grow: 1;
}

.search-wrapper svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: white;
    outline: none;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.search-input:focus {
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.15);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

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

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

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.35);
}

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

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
}

.btn-sm {
    padding: 0.45rem 0.85rem;
    font-size: 0.8rem;
    border-radius: 6px;
}

/* Custom Table Styles */
.table-container {
    overflow-x: auto;
    flex-grow: 1;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.15);
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.custom-table th {
    background: rgba(255, 255, 255, 0.02);
    padding: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--glass-border);
}

.custom-table td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.custom-table tr:last-child td {
    border-bottom: none;
}

.custom-table tr:hover td {
    background: rgba(255, 255, 255, 0.015);
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2px;
}

.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--color-success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--color-warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--color-danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.badge-info { background: rgba(59, 130, 246, 0.15); color: var(--color-info); border: 1px solid rgba(59, 130, 246, 0.2); }
.badge-purple { background: rgba(168, 85, 247, 0.15); color: var(--color-purple); border: 1px solid rgba(168, 85, 247, 0.2); }

/* Custom Overdue / Notification Cards */
.notification-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.notification-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-danger);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.notification-body {
    flex-grow: 1;
}

.notification-title {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.notification-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.notification-time {
    font-size: 0.7rem;
    color: var(--color-danger);
    font-weight: 500;
    margin-top: 4px;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    display: none; /* Controlled by JS */
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-box {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    transform: scale(0.9);
    transition: transform var(--transition-speed) cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-box {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--glass-border);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    transition: background-color var(--transition-speed);
}

.btn-close:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.btn-close svg {
    width: 20px;
    height: 20px;
}

/* Forms & Fields */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.35);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    color: white;
    outline: none;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Accessory Checkbox Grid */
.accessory-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.accessory-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-speed);
}

.accessory-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.accessory-item.selected {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.4);
}

.accessory-item input {
    accent-color: var(--color-primary);
    width: 16px;
    height: 16px;
}

.accessory-item span {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Login Page Styles */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 3rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.login-logo svg {
    width: 60px;
    height: 60px;
    color: var(--color-secondary);
}

.login-logo h1 {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(to right, #ffffff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-logo p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.login-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
    display: none;
}

/* CSV Dropzone / Area */
.csv-dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-sm);
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    background: rgba(255, 255, 255, 0.01);
}

.csv-dropzone:hover {
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.05);
}

.csv-dropzone svg {
    width: 40px;
    height: 40px;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.csv-dropzone p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.csv-dropzone span {
    color: var(--color-secondary);
    font-weight: 600;
}

/* Lend & Return Section Layout */
.lending-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 1000px) {
    .lending-layout {
        grid-template-columns: 1fr;
    }
}

.lending-card {
    padding: 2rem;
    height: 100%;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.action-buttons-cell {
    display: flex;
    gap: 0.5rem;
}

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

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Custom Chart Area */
.chart-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 1rem 0;
}

.chart-bar-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.chart-label {
    width: 60px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.chart-bar-bg {
    flex-grow: 1;
    height: 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.chart-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 10px;
    width: 0%; /* Set via JS */
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.chart-bar-fill.purple { background: linear-gradient(90deg, var(--color-purple) 0%, var(--color-primary) 100%); }
.chart-bar-fill.cyan { background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-info) 100%); }

.chart-value {
    width: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: right;
}

/* Details Panel inside Lend/Return Page */
.detail-preview-panel {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
    margin-top: 1rem;
    display: none;
}

.detail-preview-panel.active {
    display: block;
    animation: fadeIn var(--transition-speed) ease;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    padding: 0.5rem 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row span:first-child {
    color: var(--text-secondary);
}

.detail-row span:last-child {
    font-weight: 600;
}