/**
 * KKU Design System - جامعة الملك خالد
 * نظام التصميم الرسمي المطابق لموقع الجامعة
 * https://www.kku.edu.sa
 */

/* ========================================
   1. CSS Variables (المتغيرات)
   ======================================== */
:root {
    /* الألوان الرسمية - مطابقة لموقع جامعة الملك خالد */
    --kku-primary: #1B8354;
    --kku-primary-dark: #025630;
    --kku-primary-light: #3baa80;
    --kku-bg-light: #F3FCF6;
    --kku-bg-page: #f3f4f6;
    --kku-white: #FFFFFF;
    --kku-accent: #ed6c4e;
    --kku-dark: #1f2e3e;
    --kku-header-bg: #213040;
    
    /* ألوان النصوص */
    --kku-text-primary: #212121;
    --kku-text-secondary: #757575;
    --kku-text-muted: #9E9E9E;
    
    /* ألوان الحدود */
    --kku-border: #E0E0E0;
    --kku-border-light: #EEEEEE;
    
    /* الظلال */
    --kku-shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --kku-shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --kku-shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --kku-shadow-navbar: 0 2px 8px rgba(0,0,0,0.08);
    --kku-shadow-dropdown: 0 4px 16px rgba(0,0,0,0.15);
    
    /* الخطوط */
    --kku-font-family: 'Almarai', sans-serif;
    --kku-font-size-xs: 12px;
    --kku-font-size-sm: 14px;
    --kku-font-size-base: 16px;
    --kku-font-size-lg: 18px;
    --kku-font-size-xl: 24px;
    --kku-font-size-2xl: 28px;
    --kku-font-size-3xl: 32px;
    --kku-font-size-4xl: 40px;
    
    /* الأوزان */
    --kku-font-regular: 400;
    --kku-font-medium: 500;
    --kku-font-semibold: 600;
    --kku-font-bold: 700;
    
    /* الزوايا */
    --kku-radius-sm: 4px;
    --kku-radius-md: 8px;
    --kku-radius-lg: 12px;
    --kku-radius-full: 9999px;
    
    /* المسافات */
    --kku-spacing-xs: 4px;
    --kku-spacing-sm: 8px;
    --kku-spacing-md: 16px;
    --kku-spacing-lg: 24px;
    --kku-spacing-xl: 32px;
    --kku-spacing-2xl: 48px;
    --kku-spacing-3xl: 64px;
    
    /* الانتقالات */
    --kku-transition: all 0.2s ease-in-out;
    
    /* أبعاد */
    --kku-navbar-height: 64px;
    --kku-container-max: 1200px;
}

/* ========================================
   2. Reset & Base Styles
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--kku-font-family);
    font-size: var(--kku-font-size-base);
    font-weight: var(--kku-font-regular);
    line-height: 1.6;
    color: var(--kku-text-primary);
    background-color: var(--kku-bg-page);
    direction: rtl;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

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

a:hover {
    color: var(--kku-primary-dark);
    text-decoration: underline;
}

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

/* ========================================
   3. Typography (الطباعة)
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--kku-font-bold);
    line-height: 1.3;
    color: var(--kku-text-primary);
    margin-bottom: var(--kku-spacing-md);
}

h1 { font-size: var(--kku-font-size-4xl); }
h2 { font-size: var(--kku-font-size-3xl); }
h3 { font-size: var(--kku-font-size-2xl); }
h4 { font-size: var(--kku-font-size-xl); }
h5 { font-size: var(--kku-font-size-lg); }
h6 { font-size: var(--kku-font-size-base); }

p {
    margin-bottom: var(--kku-spacing-md);
    color: var(--kku-text-secondary);
}

.text-primary { color: var(--kku-primary) !important; }
.text-muted { color: var(--kku-text-muted) !important; }
.text-white { color: var(--kku-white) !important; }

/* ========================================
   4. Container
   ======================================== */
.kku-container {
    width: 100%;
    max-width: var(--kku-container-max);
    margin: 0 auto;
    padding: 0 var(--kku-spacing-lg);
}

/* ========================================
   5. Navbar (شريط التنقل)
   ======================================== */
.kku-navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--kku-navbar-height);
    background-color: var(--kku-primary);
    box-shadow: var(--kku-shadow-navbar);
    display: flex;
    align-items: center;
}

.kku-navbar .kku-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.kku-navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--kku-spacing-sm);
    text-decoration: none;
}

.kku-navbar-brand img {
    height: 40px;
    width: auto;
}

.kku-navbar-brand-text {
    display: flex;
    flex-direction: column;
}

.kku-navbar-brand-title {
    font-size: var(--kku-font-size-sm);
    font-weight: var(--kku-font-semibold);
    color: var(--kku-white);
    line-height: 1.2;
}

.kku-navbar-brand-subtitle {
    font-size: var(--kku-font-size-xs);
    color: rgba(255,255,255,0.8);
    line-height: 1.2;
}

.kku-navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--kku-spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.kku-navbar-link {
    font-size: 15px;
    font-weight: var(--kku-font-medium);
    color: var(--kku-white);
    text-decoration: none;
    padding: var(--kku-spacing-sm) var(--kku-spacing-md);
    border-radius: var(--kku-radius-sm);
    transition: var(--kku-transition);
}

.kku-navbar-link:hover,
.kku-navbar-link.active {
    color: var(--kku-white);
    background-color: rgba(255,255,255,0.15);
    text-decoration: none;
}

.kku-navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--kku-spacing-md);
}

/* Mobile Menu Toggle */
.kku-navbar-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--kku-spacing-sm);
    cursor: pointer;
    color: var(--kku-white);
}

.kku-navbar-toggle svg {
    width: 24px;
    height: 24px;
}

/* ========================================
   6. Buttons (الأزرار)
   ======================================== */
.kku-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--kku-spacing-sm);
    padding: 12px 24px;
    font-family: var(--kku-font-family);
    font-size: var(--kku-font-size-base);
    font-weight: var(--kku-font-medium);
    line-height: 1;
    border: none;
    border-radius: var(--kku-radius-sm);
    cursor: pointer;
    transition: var(--kku-transition);
    text-decoration: none;
}

.kku-btn:hover {
    transform: scale(1.02);
    text-decoration: none;
}

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

.kku-btn-primary:hover {
    background-color: var(--kku-primary-dark);
    color: var(--kku-white);
}

.kku-btn-secondary {
    background-color: var(--kku-white);
    color: var(--kku-primary);
    border: 1px solid var(--kku-primary);
}

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

.kku-btn-outline {
    background-color: transparent;
    color: var(--kku-primary);
    border: 1px solid var(--kku-primary);
}

.kku-btn-outline:hover {
    background-color: var(--kku-bg-light);
}

.kku-btn-sm {
    padding: 8px 16px;
    font-size: var(--kku-font-size-sm);
}

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

/* ========================================
   7. Cards (البطاقات)
   ======================================== */
.kku-card {
    background-color: var(--kku-white);
    border: 1px solid var(--kku-border);
    border-radius: var(--kku-radius-md);
    padding: var(--kku-spacing-lg);
    box-shadow: var(--kku-shadow-sm);
    transition: var(--kku-transition);
}

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

.kku-card-header {
    background: var(--kku-primary);
    color: var(--kku-white);
    padding: var(--kku-spacing-md) var(--kku-spacing-lg);
    margin: calc(var(--kku-spacing-lg) * -1);
    margin-bottom: var(--kku-spacing-lg);
    border-radius: var(--kku-radius-md) var(--kku-radius-md) 0 0;
}

.kku-card-title {
    font-size: var(--kku-font-size-lg);
    font-weight: var(--kku-font-semibold);
    margin-bottom: var(--kku-spacing-sm);
    color: var(--kku-text-primary);
}

.kku-card-text {
    color: var(--kku-text-secondary);
    font-size: var(--kku-font-size-sm);
    line-height: 1.6;
}

/* ========================================
   8. Forms (النماذج)
   ======================================== */
.kku-form-group {
    margin-bottom: var(--kku-spacing-md);
}

.kku-form-label {
    display: block;
    font-size: var(--kku-font-size-sm);
    font-weight: var(--kku-font-medium);
    color: var(--kku-text-primary);
    margin-bottom: var(--kku-spacing-sm);
}

.kku-form-control {
    width: 100%;
    height: 44px;
    padding: 12px 16px;
    font-family: var(--kku-font-family);
    font-size: var(--kku-font-size-base);
    color: var(--kku-text-primary);
    background-color: var(--kku-white);
    border: 1px solid var(--kku-border);
    border-radius: var(--kku-radius-sm);
    transition: var(--kku-transition);
}

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

.kku-form-control:focus {
    outline: none;
    border-color: var(--kku-primary);
    box-shadow: 0 0 0 3px rgba(0, 104, 56, 0.1);
}

textarea.kku-form-control {
    height: auto;
    min-height: 120px;
    resize: vertical;
}

/* ========================================
   9. Badges
   ======================================== */
.kku-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: var(--kku-font-size-xs);
    font-weight: var(--kku-font-medium);
    border-radius: var(--kku-radius-full);
    background-color: var(--kku-bg-light);
    color: var(--kku-primary);
}

.kku-badge-primary {
    background-color: var(--kku-primary);
    color: var(--kku-white);
}

/* ========================================
   10. Tables (الجداول)
   ======================================== */
.kku-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--kku-white);
    border-radius: var(--kku-radius-md);
    overflow: hidden;
    box-shadow: var(--kku-shadow-sm);
}

.kku-table th {
    background-color: var(--kku-primary);
    color: var(--kku-white);
    font-weight: var(--kku-font-semibold);
    padding: 12px 16px;
    text-align: right;
}

.kku-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--kku-border);
}

.kku-table tr:nth-child(even) {
    background-color: var(--kku-bg-page);
}

.kku-table tr:hover {
    background-color: var(--kku-bg-light);
}

/* ========================================
   11. Footer
   ======================================== */
.kku-footer {
    background-color: #074D31;
    color: var(--kku-white);
    padding: var(--kku-spacing-2xl) 0 var(--kku-spacing-lg);
    margin-top: auto;
}

.kku-footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--kku-spacing-xl);
}

.kku-footer-title {
    font-size: var(--kku-font-size-base);
    font-weight: var(--kku-font-semibold);
    color: var(--kku-white);
    margin-bottom: var(--kku-spacing-md);
}

.kku-footer-text {
    font-size: var(--kku-font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.kku-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.kku-footer-links li {
    margin-bottom: var(--kku-spacing-sm);
}

.kku-footer-links a {
    font-size: var(--kku-font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    transition: var(--kku-transition);
}

.kku-footer-links a:hover {
    color: var(--kku-white);
    text-decoration: none;
}

.kku-footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: var(--kku-spacing-xl);
    padding-top: var(--kku-spacing-lg);
    text-align: center;
}

.kku-footer-copyright {
    font-size: var(--kku-font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   12. Hero Section
   ======================================== */
.kku-hero {
    background: #F3FCF6;
    color: var(--kku-text-primary);
    padding: var(--kku-spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.kku-hero-content {
    position: relative;
    z-index: 1;
}

.kku-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--kku-spacing-sm);
    background-color: var(--kku-primary);
    color: var(--kku-white);
    padding: var(--kku-spacing-sm) var(--kku-spacing-md);
    border-radius: var(--kku-radius-full);
    font-size: var(--kku-font-size-sm);
    margin-bottom: var(--kku-spacing-lg);
}

.kku-hero-title {
    font-size: var(--kku-font-size-4xl);
    font-weight: var(--kku-font-bold);
    color: var(--kku-text-primary);
    margin-bottom: var(--kku-spacing-md);
    line-height: 1.2;
}

.kku-hero-title span {
    color: var(--kku-primary);
}

.kku-hero-subtitle {
    font-size: var(--kku-font-size-lg);
    color: var(--kku-text-secondary);
    margin-bottom: var(--kku-spacing-xl);
    max-width: 600px;
}

.kku-hero-actions {
    display: flex;
    gap: var(--kku-spacing-md);
    flex-wrap: wrap;
}

.kku-hero-stats {
    display: flex;
    gap: var(--kku-spacing-xl);
    margin-top: var(--kku-spacing-2xl);
}

.kku-hero-stat {
    text-align: center;
}

.kku-hero-stat-number {
    font-size: var(--kku-font-size-3xl);
    font-weight: var(--kku-font-bold);
    color: var(--kku-primary);
}

.kku-hero-stat-label {
    font-size: var(--kku-font-size-sm);
    color: var(--kku-text-secondary);
}

/* ========================================
   13. Sections
   ======================================== */
.kku-section {
    padding: var(--kku-spacing-3xl) 0;
}

.kku-section-white {
    background-color: var(--kku-white);
}

.kku-section-light {
    background-color: var(--kku-bg-page);
}

.kku-section-header {
    text-align: center;
    margin-bottom: var(--kku-spacing-2xl);
}

.kku-section-title {
    font-size: var(--kku-font-size-3xl);
    font-weight: var(--kku-font-bold);
    color: var(--kku-text-primary);
    margin-bottom: var(--kku-spacing-sm);
}

.kku-section-subtitle {
    font-size: var(--kku-font-size-base);
    color: var(--kku-text-secondary);
}

/* ========================================
   14. Grid System
   ======================================== */
.kku-grid {
    display: grid;
    gap: var(--kku-spacing-lg);
}

.kku-grid-2 { grid-template-columns: repeat(2, 1fr); }
.kku-grid-3 { grid-template-columns: repeat(3, 1fr); }
.kku-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ========================================
   15. Feature Cards
   ======================================== */
.kku-feature-card {
    background-color: var(--kku-white);
    border-radius: var(--kku-radius-md);
    padding: var(--kku-spacing-xl);
    text-align: center;
    transition: var(--kku-transition);
    border: 1px solid var(--kku-border);
}

.kku-feature-card:hover {
    background-color: var(--kku-primary);
    border-color: var(--kku-primary);
    transform: translateY(-4px);
}

.kku-feature-card:hover .kku-feature-icon,
.kku-feature-card:hover .kku-feature-title,
.kku-feature-card:hover .kku-feature-text {
    color: var(--kku-white);
}

.kku-feature-card:hover .kku-feature-icon {
    background-color: rgba(255, 255, 255, 0.2);
}

.kku-feature-icon {
    width: 70px;
    height: 70px;
    background-color: var(--kku-bg-light);
    border-radius: var(--kku-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--kku-spacing-md);
    font-size: 28px;
    color: var(--kku-primary);
    transition: var(--kku-transition);
}

.kku-feature-title {
    font-size: var(--kku-font-size-lg);
    font-weight: var(--kku-font-semibold);
    color: var(--kku-text-primary);
    margin-bottom: var(--kku-spacing-sm);
    transition: var(--kku-transition);
}

.kku-feature-text {
    font-size: var(--kku-font-size-sm);
    color: var(--kku-text-secondary);
    transition: var(--kku-transition);
}

/* ========================================
   16. Alerts
   ======================================== */
.kku-alert {
    padding: var(--kku-spacing-md) var(--kku-spacing-lg);
    border-radius: var(--kku-radius-sm);
    margin-bottom: var(--kku-spacing-md);
    display: flex;
    align-items: center;
    gap: var(--kku-spacing-sm);
}

.kku-alert-success {
    background-color: var(--kku-bg-light);
    color: var(--kku-primary);
    border-right: 4px solid var(--kku-primary);
}

.kku-alert-error {
    background-color: #FFEBEE;
    color: #C62828;
    border-right: 4px solid #C62828;
}

/* ========================================
   17. Responsive
   ======================================== */
@media (max-width: 1024px) {
    .kku-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .kku-footer-content { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root {
        --kku-font-size-4xl: 32px;
        --kku-font-size-3xl: 26px;
        --kku-font-size-2xl: 22px;
    }
    
    .kku-navbar-menu {
        display: none;
    }
    
    .kku-navbar-toggle {
        display: block;
    }
    
    .kku-grid-2,
    .kku-grid-3,
    .kku-grid-4 {
        grid-template-columns: 1fr;
    }
    
    .kku-footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .kku-hero-stats {
        flex-direction: column;
        gap: var(--kku-spacing-md);
    }
    
    .kku-hero-actions {
        flex-direction: column;
    }
    
    .kku-section {
        padding: var(--kku-spacing-2xl) 0;
    }
}

/* ========================================
   18. Utilities
   ======================================== */
.kku-text-center { text-align: center; }
.kku-text-right { text-align: right; }
.kku-text-left { text-align: left; }

.kku-mt-1 { margin-top: var(--kku-spacing-sm); }
.kku-mt-2 { margin-top: var(--kku-spacing-md); }
.kku-mt-3 { margin-top: var(--kku-spacing-lg); }
.kku-mt-4 { margin-top: var(--kku-spacing-xl); }

.kku-mb-1 { margin-bottom: var(--kku-spacing-sm); }
.kku-mb-2 { margin-bottom: var(--kku-spacing-md); }
.kku-mb-3 { margin-bottom: var(--kku-spacing-lg); }
.kku-mb-4 { margin-bottom: var(--kku-spacing-xl); }

.kku-flex { display: flex; }
.kku-flex-center { display: flex; align-items: center; justify-content: center; }
.kku-flex-between { display: flex; align-items: center; justify-content: space-between; }
.kku-gap-1 { gap: var(--kku-spacing-sm); }
.kku-gap-2 { gap: var(--kku-spacing-md); }
.kku-gap-3 { gap: var(--kku-spacing-lg); }