/**
 * SISLAJU Design System - World Class CSS
 * Modern, accessible, and performant design system
 */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
    /* Colors - Primary Palette (Professional Blue) */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;

    /* Colors - Neutral Palette */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-success-dark: #065f46;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #92400e;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-danger-dark: #991b1b;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;
    --color-info-dark: #1e40af;

    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Courier New', monospace;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    color: var(--color-gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   ANIMATIONS & KEYFRAMES
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Animation Classes */
.animate-fadeIn {
    animation: fadeIn var(--transition-base) ease-out;
}

.animate-fadeInUp {
    animation: fadeInUp var(--transition-slow) ease-out;
}

.animate-fadeInDown {
    animation: fadeInDown var(--transition-slow) ease-out;
}

.animate-slideInRight {
    animation: slideInRight var(--transition-slow) ease-out;
}

.animate-slideInLeft {
    animation: slideInLeft var(--transition-slow) ease-out;
}

.animate-scaleIn {
    animation: scaleIn var(--transition-base) ease-out;
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* ============================================
   BUTTON COMPONENTS
   ============================================ */
.btn-modern {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-weight: 600;
    font-size: var(--text-sm);
    line-height: 1.25;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}


.btn-modern:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary-modern {
    background: #2563eb;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary-modern:hover:not(:disabled) {
    background: #1d4ed8;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-primary-modern:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary-modern {
    background: white;
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
    box-shadow: var(--shadow-xs);
}

.btn-secondary-modern:hover:not(:disabled) {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
    box-shadow: var(--shadow-sm);
}

.btn-success-modern {
    background: #047857;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-success-modern:hover:not(:disabled) {
    background: #065f46;
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-danger-modern {
    background: #dc2626;
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-danger-modern:hover:not(:disabled) {
    background: #991b1b;
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* ============================================
   CARD COMPONENTS
   ============================================ */
.card-modern {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
    overflow: hidden;
}

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

.card-modern-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-200);
    background: linear-gradient(to bottom, var(--color-gray-50), white);
}

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

.card-modern-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
}

/* Stat Card */
.stat-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    border-left: 4px solid var(--color-primary-600);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: var(--color-primary-50);
    border-radius: 50%;
    transform: translate(30%, -30%);
    transition: all var(--transition-slow);
}

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

.stat-card:hover::before {
    transform: translate(30%, -30%) scale(1.5);
}

.stat-card-icon {
    font-size: 2.5rem;
    color: var(--color-primary-500);
    opacity: 0.2;
    position: absolute;
    right: 1rem;
    bottom: 1rem;
}

.stat-card-value {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary-600);
    margin: 0;
    position: relative;
    z-index: 1;
}

.stat-card-label {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

/* ============================================
   ALERT / TOAST COMPONENTS
   ============================================ */
.toast-modern {
    position: fixed;
    top: 2rem;
    right: 2rem;
    min-width: 320px;
    max-width: 420px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    padding: var(--spacing-lg);
    display: flex;
    align-items: start;
    gap: var(--spacing-md);
    z-index: var(--z-tooltip);
    animation: slideInRight var(--transition-slow) ease-out;
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}

.toast-warning {
    border-left: 4px solid var(--color-warning);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

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

.toast-error .toast-icon {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

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

.toast-info .toast-icon {
    background: var(--color-info-light);
    color: var(--color-info);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: var(--text-base);
    margin: 0 0 0.25rem 0;
}

.toast-message {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    margin: 0;
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.toast-close:hover {
    color: var(--color-gray-600);
}

/* ============================================
   TABLE ENHANCEMENTS
   ============================================ */
.table-modern {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table-modern thead {
    background: var(--color-gray-50);
}

.table-modern th {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-gray-200);
}

.table-modern td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-gray-100);
    transition: background-color var(--transition-fast);
}

.table-modern tbody tr {
    transition: all var(--transition-fast);
}

.table-modern tbody tr:hover {
    background: var(--color-primary-50);
    box-shadow: var(--shadow-xs);
}

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

/* ============================================
   LOADING STATES
   ============================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-gray-200) 0%,
        var(--color-gray-100) 50%,
        var(--color-gray-200) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

/* ============================================
   FORM ENHANCEMENTS
   ============================================ */
.form-control-modern {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-gray-800);
    background: white;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.form-control-modern:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
}

.form-control-modern:hover:not(:focus) {
    border-color: var(--color-gray-400);
}

.form-label-modern {
    display: block;
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    margin-bottom: 0.5rem;
}

/* ============================================
   BADGE COMPONENTS
   ============================================ */
.badge-modern {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: var(--color-primary-100);
    color: var(--color-primary-800);
}

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

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

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

/* Custom Badge Colors */
.bg-purple {
    background-color: #e0b0ff; /* Light purple */
}
.text-purple {
    color: #8a2be2; /* Darker purple */
}
.border-purple {
    border-color: #8a2be2 !important;
}

.bg-teal {
    background-color: #b2ebf2; /* Light teal */
}
.text-teal {
    color: #00838f; /* Darker teal */
}
.border-teal {
    border-color: #00838f !important;
}

.bg-orange {
    background-color: #ffe0b2; /* Light orange */
}
.text-orange {
    color: #ff8f00; /* Darker orange */
}
.border-orange {
    border-color: #ff8f00 !important;
}

/* ============================================
   MODAL ENHANCEMENTS
   ============================================ */
.modal-modern .modal-content {
    border: none;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
}

.modal-modern .modal-header {
    background: linear-gradient(to right, var(--color-primary-600), var(--color-primary-700));
    color: white;
    padding: var(--spacing-lg);
    border: none;
}

.modal-modern .modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-modern .modal-body {
    padding: var(--spacing-xl);
}

.modal-modern .modal-footer {
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border: none;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.glass-effect {
    background: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.gradient-primary {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
}

.gradient-success {
    background: linear-gradient(135deg, var(--color-success), #059669);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-800));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .toast-modern {
        right: 1rem;
        left: 1rem;
        min-width: auto;
    }

    .stat-card {
        padding: var(--spacing-lg);
    }

    .stat-card-value {
        font-size: var(--text-2xl);
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.focus-visible:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* ============================================
   CUSTOM OVERRIDES
   ============================================ */
.stat-icon-circle {
    width: 60px;
    height: 60px;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}