/* =============================================
   E-Portal — Core Design System
   Theme: Blue (#1565C0), Yellow (#FFB300), White
   ============================================= */

/* CSS Custom Properties */
:root {
    /* Primary - Blue */
    --primary: #1565C0;
    --primary-light: #42A5F5;
    --primary-lighter: #90CAF9;
    --primary-dark: #0D47A1;
    --primary-gradient: linear-gradient(135deg, #1565C0 0%, #0D47A1 100%);
    
    /* Accent - Yellow/Gold */
    --accent: #FFB300;
    --accent-light: #FFD54F;
    --accent-dark: #FF8F00;
    --accent-gradient: linear-gradient(135deg, #FFB300 0%, #FF8F00 100%);
    
    /* Backgrounds */
    --bg-white: #FFFFFF;
    --bg-light: #F5F7FA;
    --bg-dark: #E8EDF2;
    --bg-card: #FFFFFF;
    --bg-glass: rgba(255, 255, 255, 0.85);
    
    /* Text */
    --text-primary: #1A1A2E;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --text-white: #FFFFFF;
    --text-on-primary: #FFFFFF;
    
    /* Status Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --info: #3B82F6;
    --info-light: #DBEAFE;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 50px rgba(0, 0, 0, 0.15);
    --shadow-primary: 0 4px 20px rgba(21, 101, 192, 0.3);
    --shadow-accent: 0 4px 20px rgba(255, 179, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-navbar: 500;
    --z-modal: 1000;
    --z-toast: 1100;
    --z-loader: 1200;
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-light);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input, select, textarea {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    border: none;
    outline: none;
}

ul, ol {
    list-style: none;
}

/* =============================================
   GLOBAL LOADER
   ============================================= */
.global-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loader);
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.global-loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-md);
}

.spinner-svg {
    animation: rotate 1.4s linear infinite;
    width: 100%;
    height: 100%;
}

.spinner-svg circle {
    stroke: var(--primary);
    stroke-linecap: round;
    animation: dash 1.4s ease-in-out infinite;
}

.loader-text {
    font-family: var(--font-heading);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

@keyframes dash {
    0% {
        stroke-dasharray: 1, 200;
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dasharray: 89, 200;
        stroke-dashoffset: -35;
    }
    100% {
        stroke-dasharray: 89, 200;
        stroke-dashoffset: -124;
    }
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    font-family: var(--font-heading);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    user-select: none;
    letter-spacing: 0.3px;
}

.btn:active {
    transform: scale(0.97);
}

.btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Primary Button */
.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-white);
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(21, 101, 192, 0.4);
    transform: translateY(-1px);
}

/* Accent Button */
.btn-accent {
    background: var(--accent-gradient);
    color: var(--text-primary);
    box-shadow: var(--shadow-accent);
}

.btn-accent:hover {
    box-shadow: 0 6px 25px rgba(255, 179, 0, 0.4);
    transform: translateY(-1px);
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--text-white);
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
    color: var(--text-white);
}

.btn-danger:hover {
    box-shadow: 0 6px 25px rgba(239, 68, 68, 0.4);
    transform: translateY(-1px);
}

/* Success Button */
.btn-success {
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    color: var(--text-white);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-light);
    color: var(--text-primary);
}

/* Button Sizes */
.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 16px 32px;
    font-size: var(--font-size-base);
}

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

/* Button Loading State */
.btn.loading {
    pointer-events: none;
    opacity: 0.85;
}

.btn.loading .btn-text {
    visibility: hidden;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: rotate 0.6s linear infinite;
}

/* =============================================
   FORM ELEMENTS
   ============================================= */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:focus {
    background: var(--bg-white);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.15);
}

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

.form-input.error {
    border-color: var(--danger);
    background: var(--danger-light);
}

.form-input-icon {
    position: relative;
}

.form-input-icon .form-input {
    padding-left: 48px;
}

.form-input-icon .input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: color var(--transition-base);
}

.form-input-icon:focus-within .input-icon {
    color: var(--primary);
}

.form-select {
    width: 100%;
    padding: 14px 16px;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 44px;
}

.form-select:focus {
    background-color: var(--bg-white);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.15);
}

.form-helper {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--danger);
    margin-top: var(--space-xs);
}

/* =============================================
   CARDS
   ============================================= */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.card-header h3 {
    font-size: var(--font-size-lg);
    margin: 0;
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
}

/* =============================================
   TOAST NOTIFICATIONS
   ============================================= */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    max-width: 420px;
    animation: toastIn 0.4s var(--transition-spring) forwards;
    pointer-events: auto;
    border-left: 4px solid var(--primary);
}

.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }

.toast.removing {
    animation: toastOut 0.3s ease forwards;
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast-icon.success { color: var(--success); }
.toast-icon.error { color: var(--danger); }
.toast-icon.warning { color: var(--warning); }
.toast-icon.info { color: var(--primary); }

.toast-body {
    flex: 1;
}

.toast-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: 2px;
}

.toast-message {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.toast-close:hover {
    background: var(--bg-light);
    color: var(--text-primary);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateX(100px) scale(0.9);
    }
}

/* =============================================
   DATA TABLE
   ============================================= */
.data-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    padding: 14px 16px;
    text-align: left;
    font-family: var(--font-heading);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--bg-dark);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 14px 16px;
    font-size: var(--font-size-sm);
    border-bottom: 1px solid var(--bg-light);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background var(--transition-fast);
}

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

.data-table .actions {
    display: flex;
    gap: var(--space-xs);
    align-items: center;
}

.data-table .btn-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-light);
    border: none;
    color: var(--text-secondary);
}

.data-table .btn-icon:hover {
    background: var(--primary);
    color: var(--text-white);
}

.data-table .btn-icon.danger:hover {
    background: var(--danger);
}

.data-table .btn-icon svg {
    width: 16px;
    height: 16px;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: 20px;
    letter-spacing: 0.3px;
}

.badge-primary {
    background: rgba(21, 101, 192, 0.1);
    color: var(--primary);
}

.badge-success {
    background: var(--success-light);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-light);
    color: var(--danger);
}

.badge-warning {
    background: var(--warning-light);
    color: var(--warning);
}

.badge-info {
    background: rgba(15, 118, 110, 0.1);
    color: #0F766E;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    margin-top: var(--space-lg);
}

.pagination .page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-white);
    border: 1px solid var(--bg-dark);
    color: var(--text-secondary);
}

.pagination .page-btn:hover,
.pagination .page-btn.active {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

.pagination .page-btn.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.pagination .page-btn svg {
    width: 16px;
    height: 16px;
}

/* =============================================
   SKELETON LOADING
   ============================================= */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-dark) 25%,
        var(--bg-light) 50%,
        var(--bg-dark) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

.skeleton-text {
    height: 14px;
    margin-bottom: 8px;
    width: 80%;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-title {
    height: 20px;
    width: 50%;
    margin-bottom: 12px;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
}

.skeleton-card {
    height: 120px;
    border-radius: var(--radius-lg);
}

.skeleton-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* =============================================
   UTILITIES
   ============================================= */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--primary) !important; }
.text-accent { color: var(--accent) !important; }
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-secondary { color: var(--text-secondary) !important; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.d-flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.flex-1 { flex: 1; }

.hidden { display: none !important; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Fade animations */
.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

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

.slide-up {
    animation: slideUp 0.4s var(--transition-spring) forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
    :root {
        --space-lg: 16px;
        --space-xl: 24px;
        --space-2xl: 32px;
    }

    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
        top: var(--space-md);
    }

    .toast {
        min-width: auto;
        max-width: none;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 15px;
    }
}

/* File Drop Zone */
.drop-zone {
    border: 2px dashed var(--bg-dark);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--bg-light);
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary);
    background: rgba(21, 101, 192, 0.05);
}

.drop-zone svg {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin: 0 auto var(--space-md);
}

.drop-zone p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.drop-zone .browse-link {
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
}

/* Search box */
.search-box {
    position: relative;
}

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

.search-box input {
    padding-left: 42px;
    width: 100%;
    padding: 12px 16px 12px 42px;
    border: 2px solid var(--bg-dark);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--bg-white);
    transition: all var(--transition-base);
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    color: var(--text-muted);
    margin: 0 auto var(--space-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-lg);
}