/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    /* Colors - School Theme */
    --primary-color: #002b5b;
    --primary-light: #0051a8;
    --primary-dark: #001a3a;
    --secondary-color: #f5b800;
    --secondary-light: #ffd54f;
    --secondary-dark: #c79100;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f2f2f2;
    --medium-gray: #e0e0e0;
    --dark-gray: #666666;
    --text-dark: #333333;
    
    /* Semantic Colors */
    --success: #27ae60;
    --danger: #e74c3c;
    --warning: #f39c12;
    --info: #3498db;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-regular);
    color: var(--text-dark);
    background-color: var(--light-gray);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ===========================
   Background Elements
   =========================== */
.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        var(--primary-color) 0%, 
        var(--primary-light) 50%, 
        var(--primary-dark) 100%);
    opacity: 0.95;
    z-index: -2;
}

.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(255,255,255,.03) 35px, rgba(255,255,255,.03) 70px),
        repeating-linear-gradient(-45deg, transparent, transparent 35px, rgba(255,255,255,.03) 35px, rgba(255,255,255,.03) 70px);
    z-index: -1;
}

/* Floating Decorations */
.float-decoration {
    position: fixed;
    color: rgba(255, 255, 255, 0.1);
    font-size: 3rem;
    animation: float 20s infinite ease-in-out;
    z-index: 1;
    pointer-events: none;
}

.float-1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.float-2 {
    top: 60%;
    right: 8%;
    animation-delay: 5s;
}

.float-3 {
    bottom: 15%;
    left: 10%;
    animation-delay: 10s;
}

.float-4 {
    top: 30%;
    right: 15%;
    animation-delay: 15s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(10deg);
    }
}

/* ===========================
   Container & Layout
   =========================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   Header & Navigation
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 43, 91, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-normal);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.school-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
    line-height: 1.2;
}

.school-location {
    font-size: 0.875rem;
    color: var(--secondary-color);
    font-weight: var(--font-weight-medium);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
    background: rgba(245, 184, 0, 0.1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: var(--transition-fast);
}

.mobile-menu-toggle:hover {
    color: var(--secondary-color);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    z-index: 2000;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.mobile-nav-link {
    color: var(--white);
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
}

.mobile-nav-link:hover {
    background: rgba(245, 184, 0, 0.1);
    color: var(--secondary-color);
}

/* ===========================
   Hero Section
   =========================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xxl);
    position: relative;
    z-index: 2;
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    color: var(--white);
}

.hero-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-medium);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.hero-main-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-extrabold);
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--white), var(--secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--secondary-light);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

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

/* Hero Illustration */
.hero-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
}

.illustration-card {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    animation: pulse 3s infinite ease-in-out;
}

.illustration-card i {
    font-size: 8rem;
    color: var(--secondary-color);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: var(--shadow-xl);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

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

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border: 2px solid var(--white);
}

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size:1.125rem;
}

/* ===========================
   Stats Section
   =========================== */
.stats-section {
    background: var(--white);
    padding: var(--spacing-xl) 0;
    position: relative;
    z-index: 2;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--light-gray), var(--white));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    color: var(--dark-gray);
    font-weight: var(--font-weight-medium);
}

/* ===========================
   Jurusan Section
   =========================== */
.jurusan-section {
    padding: var(--spacing-xxl) 0;
    background: var(--light-gray);
    position: relative;
    z-index: 2;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--dark-gray);
    font-weight: var(--font-weight-medium);
}

.jurusan-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.jurusan-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.jurusan-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.jurusan-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: var(--transition-normal);
}

.jurusan-card:hover .jurusan-icon {
    transform: rotate(360deg) scale(1.1);
}

.jurusan-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.jurusan-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.jurusan-description {
    font-size: 1rem;
    color: var(--dark-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.jurusan-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--light-gray);
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: var(--white);
}

/* ===========================
   Login Portal Section
   =========================== */
.login-portal-section {
    padding: var(--spacing-xxl) 0;
    background: var(--white);
    position: relative;
    z-index: 2;
}

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

.portal-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.portal-subtitle {
    font-size: 1.25rem;
    color: var(--dark-gray);
    font-weight: var(--font-weight-medium);
}

.portal-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.portal-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xxl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition-normal);
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.portal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent, rgba(0,0,0,0.03));
    z-index: 0;
    transition: var(--transition-normal);
}

.portal-card:hover::before {
    background: linear-gradient(135deg, transparent, rgba(0,0,0,0.08));
}

.portal-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.student-card {
    border-color: var(--info);
}

.student-card:hover {
    border-color: var(--primary-color);
}

.teacher-card {
    border-color: var(--success);
}

.teacher-card:hover {
    border-color: var(--secondary-color);
}

.portal-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.portal-card:hover .portal-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.portal-icon i {
    font-size: 4rem;
    color: var(--white);
}

.portal-card-title {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.portal-card-description {
    font-size: 1.125rem;
    color: var(--dark-gray);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.portal-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
}

.portal-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-student {
    background: linear-gradient(135deg, var(--info), #5dade2);
    color: var(--white);
}

.btn-student:hover {
    background: linear-gradient(135deg, #2980b9, var(--info));
}

.btn-teacher {
    background: linear-gradient(135deg, var(--success), #52be80);
    color: var(--white);
}

.btn-teacher:hover {
    background: linear-gradient(135deg, #229954, var(--success));
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--primary-dark);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
}

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

.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-logo img {
    width: 50px;
    height: 50px;
}

.footer-logo h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--white);
}

.footer-logo p {
    font-size: 0.875rem;
    color: var(--secondary-color);
}

.footer-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-bold);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.125rem;
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--secondary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

/* ===========================
   Scroll to Top Button
   =========================== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    border-radius: var(--radius-full);
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--secondary-light);
    transform: translateY(-5px);
}

/* ===========================
   Responsive Design
   =========================== */

/* Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-illustration {
        order: 2;
        margin-top: var(--spacing-xl);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .jurusan-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-main-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .illustration-card {
        width: 250px;
        height: 250px;
    }
    
    .illustration-card i {
        font-size: 6rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1.125rem;
    }
    
    .jurusan-grid {
        grid-template-columns: 1fr;
    }
    
    .portal-cards {
        grid-template-columns: 1fr;
    }
    
    .portal-card {
        padding: var(--spacing-lg);
    }
    
    .portal-icon {
        width: 100px;
        height: 100px;
    }
    
    .portal-icon i {
        font-size: 3rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo {
        width: 40px;
        height: 40px;
    }
    
    .school-name {
        font-size: 1rem;
    }
    
    .school-location {
        font-size: 0.75rem;
    }
    
    .hero-main-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1.25rem;
    }
    
    .stat-item i {
        font-size: 2.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .jurusan-icon {
        width: 60px;
        height: 60px;
    }
    
    .jurusan-icon i {
        font-size: 2rem;
    }
    
    .jurusan-title {
        font-size: 1.25rem;
    }
    
    .portal-icon {
        width: 80px;
        height: 80px;
    }
    
    .portal-icon i {
        font-size: 2.5rem;
    }
    
    .portal-card-title {
        font-size: 1.5rem;
    }
    
    .scroll-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    .header,
    .mobile-menu,
    .hero-buttons,
    .float-decoration,
    .scroll-to-top {
        display: none;
    }
    
    .bg-overlay,
    .bg-pattern {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}