/* ===================================
   GLOBAL STYLES & RESET
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --warning-color: #ea580c;
    --info-color: #0284c7;
    --light-bg: #f8fafc;
    --light-border: #e2e8f0;
    --dark-text: #1e293b;
    --gray-text: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

hr {
    border: none;
    border-top: 1px solid var(--light-border);
    margin: 1.5rem 0;
}

/* ===================================
   LOGIN PAGE
   =================================== */
body.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.login-container {
    background-color: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 380px;
    animation: slideUp 0.5s ease-out;
}

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

.login-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--dark-text);
    font-size: 1.75rem;
    font-weight: 600;
}

.login-container form div {
    margin-bottom: 1.25rem;
}

.login-container label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-text);
    font-size: 0.95rem;
}

.login-container input[type="text"],
.login-container input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--light-border);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: var(--transition);
    background: #fff;
}

.login-container input[type="text"]:focus,
.login-container input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-container button {
    width: 100%;
    padding: 0.875rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.login-container button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

.login-container button:active {
    transform: translateY(0);
}

.error {
    color: var(--danger-color);
    background: #fee2e2;
    padding: 0.875rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    border-left: 4px solid var(--danger-color);
    animation: slideDown 0.3s ease-out;
}

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

/* ===================================
   TOP NAVIGATION
   =================================== */
.top-nav {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: auto;
    box-shadow: var(--shadow-md);
}

.top-nav h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.top-nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.top-nav .user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.top-nav .user-info span {
    font-size: 0.95rem;
}

.top-nav .user-info b {
    font-weight: 600;
}

.top-nav .user-info a {
    color: #fff;
    
    background: linear-gradient(135deg, var(--danger-color) 0%, #991b1b 100%);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.top-nav .user-info a:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   SIDEBAR
   =================================== */
.sidebar {
    width: 260px;
    background: #fff;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.08);
    z-index: 99;
    padding-top: 60px;
    overflow-y: auto;
    transition: var(--transition);
    transform: translateX(0);
}

/* Sidebar collapsed state */
.sidebar.sidebar-hidden {
    transform: translateX(-100%);
}

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.active,
    .sidebar.hover-peek {
        transform: translateX(0);
    }
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar::-webkit-scrollbar-thumb {
    background: var(--light-border);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

.sidebar-nav {
    list-style: none;
    padding: 0.5rem 0;
    margin: 0;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    text-decoration: none;
    color: var(--gray-text);
    border-left: 3px solid transparent;
    transition: var(--transition);
    font-weight: 500;
}

.sidebar-nav li a:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    border-left-color: var(--primary-light);
}

.sidebar-nav li.active a {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.1) 0%, transparent 100%);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.sidebar-toggle-btn {
    font-size: 1.5rem;
    color: white;
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    display: block;
    background: transparent;
    border: none;
    border-radius: 4px;
    z-index: 1000;
    position: relative;
}

.sidebar-toggle-btn:hover {
    background: rgba(0, 0, 0, 0.2);
}

/* ===================================
   MAIN CONTENT
   =================================== */
.main-content {
    margin-left: 260px;
    padding-top: 80px;
    padding-left: 2rem;
    padding-right: 2rem;
    padding-bottom: 2rem;
    min-height: 100vh;
    transition: var(--transition);
}

.main-content.sidebar-collapsed {
    margin-left: 0;
}

.main-content > h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--dark-text);
    font-weight: 700;
}

.main-content > p {
    color: var(--gray-text);
    font-size: 1rem;
    margin-bottom: 1rem;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    text-align: center;
    padding: 1.5rem;
    margin-left: 260px;
    margin-top: 3rem;
    font-size: 0.9rem;
    color: var(--gray-text);
    background: #fff;
    border-top: 1px solid var(--light-border);
    transition: var(--transition);
}

.footer.sidebar-collapsed {
    margin-left: 0;
}

/* ===================================
   STAT CARDS
   =================================== */
.stat-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: #fff;
    padding: 1.75rem;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100px;
    height: 100px;
    background: rgba(37, 99, 235, 0.05);
    border-radius: 50%;
}

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

.stat-card h4 {
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--gray-text);
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--primary-color);
}

.stat-card .stat-subtitle {
    font-size: 0.85rem;
    color: var(--gray-text);
    margin-top: 0.5rem;
}

/* ===================================
   FORM & TABLE CONTAINERS
   =================================== */
.form-container,
.table-container {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    transition: var(--transition);
}

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

.header-table {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-table h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--dark-text);
    font-weight: 600;
}

/* ===================================
   FORM ELEMENTS
   =================================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-text);
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="datetime-local"],
.form-group input[type="date"],
.form-group input[type="search"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--light-border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: #fff;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

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

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1e3a8a 100%);
}

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

.btn-secondary:hover {
    background: #475569;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #15803d 100%);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #15803d 0%, #166534 100%);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #991b1b 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #991b1b 0%, #7f1d1d 100%);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #c2410c 100%);
    color: white;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #c2410c 0%, #92400e 100%);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #0369a1 100%);
    color: white;
}

.btn-info:hover {
    background: linear-gradient(135deg, #0369a1 0%, #075985 100%);
}

.btn-sm {
    padding: 0.5rem 0.875rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
    display: block;
}

/* ===================================
   TABLES
   =================================== */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

table thead {
    background: var(--light-bg);
}

table thead th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--dark-text);
    border-bottom: 2px solid var(--light-border);
}

table tbody td {
    border-bottom: 1px solid var(--light-border);
    color: var(--gray-text);
}

table tbody tr:hover {
    background: var(--light-bg);
}

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

/* ===================================
   ALERTS & MESSAGES
   =================================== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    animation: slideDown 0.3s ease-out;
}

.alert-success {
    background: #f0fdf4;
    border-color: var(--success-color);
    color: #166534;
}

.alert-danger {
    background: #fef2f2;
    border-color: var(--danger-color);
    color: #991b1b;
}

.alert-warning {
    background: #fef3c7;
    border-color: var(--warning-color);
    color: #92400e;
}

.alert-info {
    background: #f0f9ff;
    border-color: var(--info-color);
    color: #0c4a6e;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 1024px) {
    .main-content {
        margin-left: 0;
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .footer {
        margin-left: 0;
    }

    .sidebar {
        transform: translateX(-100%);
        width: 280px;
        z-index: 100;
        transition: transform 0.3s ease-in-out;
    }

    /* Show sidebar on hover when it's hidden */
    .sidebar:hover,
    .sidebar.hover-peek {
        transform: translateX(0);
        box-shadow: 2px 0 12px rgba(0, 0, 0, 0.15);
    }

    .sidebar-toggle-btn {
        display: block;
    }

    .sidebar.active {
        transform: translateX(0);
        box-shadow: 2px 0 12px rgba(0, 0, 0, 0.15);
    }

    /* Add backdrop overlay when sidebar is active */
    body:has(.sidebar.active)::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: 99;
    }

    .stat-container {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .top-nav {
        padding: 0.75rem 1rem;
        height: auto;
    }

    .top-nav h3 {
        font-size: 1rem;
    }

    .top-nav-left {
        gap: 0.5rem;
    }

    .top-nav .user-info {
        flex-direction: column;
        align-items: flex-end;
        gap: 0.5rem;
    }

    .top-nav .user-info span {
        font-size: 0.85rem;
    }

    .main-content {
        padding-top: 90px;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .main-content > h2 {
        font-size: 1.5rem;
    }

    .form-container,
    .table-container {
        padding: 1.25rem;
    }

    .header-table {
        flex-direction: column;
        align-items: flex-start;
    }

    .stat-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stat-card {
        padding: 1.5rem;
    }

    .btn {
        padding: 0.65rem 1.25rem;
        font-size: 0.9rem;
    }

    table {
        font-size: 0.9rem;
    }

    table thead th,
    table tbody td {
        padding: 0.75rem 0.5rem;
    }

    .table-container {
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .top-nav {
        padding: 0.5rem;
    }

    .top-nav h3 {
        font-size: 0.9rem;
    }

    .main-content {
        padding-top: 85px;
        padding-left: 0.75rem;
        padding-right: 0.75rem;
        padding-bottom: 1rem;
    }

    .main-content > h2 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .form-container,
    .table-container {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .header-table h3 {
        font-size: 1.1rem;
    }

    .stat-card {
        padding: 1.25rem;
    }

    .stat-card h4 {
        font-size: 0.85rem;
    }

    .stat-card .stat-number {
        font-size: 2rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .btn + .btn {
        margin-left: 0;
        margin-top: 0.5rem;
    }

    table {
        font-size: 0.8rem;
    }

    table thead th,
    table tbody td {
        padding: 0.5rem 0.25rem;
    }

    .login-container {
        margin: 1rem;
        padding: 1.5rem;
    }

    .login-container h2 {
        font-size: 1.5rem;
    }
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--gray-text); }
.text-danger { color: var(--danger-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-info { color: var(--info-color); }

.font-bold { font-weight: 600; }
.font-normal { font-weight: 400; }

.hidden { display: none !important; }
.visible { display: block !important; }

/* ===================================
   PRINT STYLES
   =================================== */
@media print {
    .top-nav,
    .sidebar,
    .sidebar-toggle-btn,
    .btn {
        display: none !important;
    }

    .main-content {
        margin-left: 0;
        padding: 0;
    }

    .footer {
        margin-left: 0;
    }
}