/**
 * Kampus Thullab - Main CSS Design System
 * Color scheme based on logo: Blue + Gold
 */

/* ========================================
   CSS VARIABLES & DESIGN TOKENS
   ======================================== */
:root {
    /* Brand Colors from Logo */
    --color-primary: #005A9C;
    /* Deep Blue */
    --color-primary-light: #1E88E5;
    /* Light Blue */
    --color-primary-dark: #003D6B;
    /* Darker Blue */
    --color-accent: #B8860B;
    /* Gold */
    --color-accent-light: #DAA520;
    /* Goldenrod */
    --color-accent-dark: #8B6914;
    /* Dark Gold */

    /* Neutral Colors */
    --color-white: #FFFFFF;
    --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-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent-dark) 0%, var(--color-accent-light) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(0, 90, 156, 0.95) 0%, rgba(30, 136, 229, 0.9) 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Inter', sans-serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    /* 12px */
    --text-sm: 0.875rem;
    /* 14px */
    --text-base: 1rem;
    /* 16px */
    --text-lg: 1.125rem;
    /* 18px */
    --text-xl: 1.25rem;
    /* 20px */
    --text-2xl: 1.5rem;
    /* 24px */
    --text-3xl: 1.875rem;
    /* 30px */
    --text-4xl: 2.25rem;
    /* 36px */
    --text-5xl: 3rem;
    /* 48px */
    --text-6xl: 3.75rem;
    /* 60px */

    /* Spacing */
    --space-1: 0.25rem;
    /* 4px */
    --space-2: 0.5rem;
    /* 8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.25rem;
    /* 20px */
    --space-6: 1.5rem;
    /* 24px */
    --space-8: 2rem;
    /* 32px */
    --space-10: 2.5rem;
    /* 40px */
    --space-12: 3rem;
    /* 48px */
    --space-16: 4rem;
    /* 64px */
    --space-20: 5rem;
    /* 80px */
    --space-24: 6rem;
    /* 96px */

    /* Border Radius */
    --radius-sm: 0.375rem;
    /* 6px */
    --radius-md: 0.5rem;
    /* 8px */
    --radius-lg: 0.75rem;
    /* 12px */
    --radius-xl: 1rem;
    /* 16px */
    --radius-2xl: 1.5rem;
    /* 24px */
    --radius-full: 9999px;

    /* Shadows */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-tooltip: 1050;
}

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
}

h2 {
    font-size: var(--text-4xl);
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--space-4);
}

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

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

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

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

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

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

.btn-accent:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover:not(:disabled) {
    color: var(--color-white);
    background: var(--color-primary);
}

/* Button White */
.btn-white {
    color: var(--color-primary);
    background: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-white:hover:not(:disabled) {
    background: var(--color-gray-50);
    transform: translateY(-2px);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-6);
    transition: all var(--transition-base);
}

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

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: var(--radius-xl);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-3);
}

.card-text {
    color: var(--color-gray-600);
    font-size: var(--text-base);
    line-height: 1.6;
}

/* ========================================
   FORMS
   ======================================== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
}

.form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-gray-800);
    background: var(--color-white);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 90, 156, 0.1);
}

.form-control::placeholder {
    color: var(--color-gray-400);
}

select.form-control {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

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

.form-error {
    color: var(--color-error);
    font-size: var(--text-sm);
    margin-top: var(--space-1);
}

/* ========================================
   BADGES
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    color: var(--color-primary);
    background: rgba(0, 90, 156, 0.1);
}

.badge-success {
    color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
}

.badge-warning {
    color: var(--color-warning);
    background: rgba(245, 158, 11, 0.1);
}

.badge-error {
    color: var(--color-error);
    background: rgba(239, 68, 68, 0.1);
}

/* ========================================
   UTILITIES
   ======================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.container-narrow {
    max-width: 960px;
}

.section {
    padding: var(--space-20) 0;
}

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

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

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

.mb-0 {
    margin-bottom: 0;
}

.mb-4 {
    margin-bottom: var(--space-4);
}

.mb-6 {
    margin-bottom: var(--space-6);
}

.mb-8 {
    margin-bottom: var(--space-8);
}

.mt-4 {
    margin-top: var(--space-4);
}

.mt-6 {
    margin-top: var(--space-6);
}

.mt-8 {
    margin-top: var(--space-8);
}

.grid {
    display: grid;
    gap: var(--space-6);
}

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

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

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

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-4 {
    gap: var(--space-4);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

/* ========================================
   BUTTON VARIANTS
   ======================================== */
.btn-white {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-white);
}

.btn-white:hover {
    background: var(--color-gray-50);
    border-color: var(--color-gray-50);
}

.btn-success {
    background: linear-gradient(135deg, #10B981 0%, #34D399 100%);
    color: var(--color-white);
}

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

/* ========================================
   RESPONSIVE BREAKPOINTS
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
    }

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

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

@media (max-width: 768px) {
    :root {
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
    }

    .grid-4,
    .grid-3,
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 var(--space-4);
    }

    .section {
        padding: var(--space-12) 0;
    }
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
    }

    h1 {
        font-size: var(--text-4xl);
    }

    h2 {
        font-size: var(--text-3xl);
    }
}