:root {
    /* Color Palette */
    --primary: #0f766e; /* Energetic Teal/Medical Blue */
    --primary-dark: #115e59;
    --primary-light: #ccfbf1;
    --accent: #f59e0b; /* Vibrant Yellow/Orange */
    --accent-hover: #d97706;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --white: #ffffff;
    --border: #e2e8f0;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Layout */
    --container-width: 1200px;
    --nav-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography utilities */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--text-main);
    line-height: 1.2;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
    color: var(--primary);
}

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

.logo-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--primary-dark);
    line-height: 1;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-links a:hover:not(.btn-primary)::after,
.nav-links a.active:not(.btn-primary)::after {
    width: 100%;
}

.nav-links a:hover {
    color: var(--primary);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-dark);
}

/* Buttons */
.btn-primary, .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-family: var(--font-heading);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff !important;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white) !important;
    border: 2px solid var(--white);
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 12px;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: url('../images/rektorat.png') center/cover no-repeat;
    margin-top: 0; /* Nav sits on top */
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(15, 118, 110, 0.95) 0%, rgba(17, 94, 89, 0.7) 50%, rgba(0, 0, 0, 0.4) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
}

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

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-text h1 {
    font-size: 3.5rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.hero-text p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.stat-item {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    color: var(--white);
    transition: transform 0.3s;
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.25);
}

.stat-item:nth-child(3) {
    grid-column: span 2;
}

.stat-item h3 {
    color: var(--accent);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.stat-item h3 i {
    color: var(--accent);
}

.stat-item p {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Sections Global */
section {
    padding: 6rem 2rem;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-muted);
}

/* Features/About */
.features-grid {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 2.5rem 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(15, 118, 110, 0.08);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    transition: all 0.3s;
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: var(--white);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Requirements Section */
.requirements-section {
    background: var(--primary-dark);
    color: var(--white);
}

.req-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.req-content h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.req-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
}

.req-list {
    list-style: none;
}

.req-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.req-list i {
    color: var(--accent);
    font-size: 1.25rem;
    margin-top: 2px;
}

.req-image-glass {
    height: 100%;
    min-height: 400px;
    background: url('../images/hero.png') center/cover no-repeat;
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding: 2rem;
}

.req-image-glass::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 118, 110, 0.9), rgba(0, 0, 0, 0.2));
}

.glass-box {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-box i {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1rem;
    display: block;
}

.glass-box h3 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.glass-box p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
}

/* Registration Form */
.register-section {
    background: var(--bg-main);
}

.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    padding: 3rem;
    border: 1px solid var(--border);
}

.form-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.form-header h2 {
    color: var(--primary-dark);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.form-header p {
    color: var(--text-muted);
}

.modern-form .form-row {
    margin-bottom: 1.5rem;
}

.modern-form .split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

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

.input-with-icon i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.2rem;
}

.input-with-icon input {
    padding-left: 3rem;
}

input, textarea {
    width: 100%;
    padding: 1rem;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-main);
    background: var(--bg-main);
    transition: all 0.3s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
    background: var(--bg-card);
}

.btn-submit {
    width: 100%;
    padding: 1.25rem;
    font-size: 1.1rem;
    margin-top: 1rem;
}

.success-message {
    text-align: center;
    padding: 2rem;
}

.success-message i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: block;
}

.success-message h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.success-message p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hidden {
    display: none;
}

/* Footer */
footer {
    background: var(--text-main);
    color: var(--white);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo-title {
    color: var(--white);
}

.footer-brand .logo-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.footer-brand p {
    margin-top: 1.5rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer-contact h3, .footer-social h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--accent);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text p {
        margin: 0 auto 2.5rem auto;
    }

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

    .hero-glass-card {
        max-width: 500px;
        margin: 0 auto;
    }

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

    .req-container {
        grid-template-columns: 1fr;
    }
    
    .req-image-glass {
        min-height: 300px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background: var(--bg-card);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
        transition: clip-path 0.4s ease-in-out;
    }

    .nav-links.active {
        clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .modern-form .split {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}