/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Campus Tech Colors */
    --primary-navy: #1B2B3A;
    --campus-red: #C8102E;
    --academic-gold: #D4AF37;
    --tropical-green: #00A651;
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --medium-gray: #E0E0E0;
    --dark-gray: #333333;
    --text-color: #2C3E50;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Georgia', serif;

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

    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

ul {
    list-style: none;
}

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

/* ========================================
   WhatsApp Floating Button
   ======================================== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: var(--tropical-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 166, 81, 0.4);
    z-index: 1000;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 166, 81, 0.6);
}

.whatsapp-icon {
    width: 35px;
    height: 35px;
    color: var(--white);
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--primary-navy);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 5px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--campus-red);
    background-color: var(--light-gray);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-navy);
    transition: var(--transition);
    border-radius: 3px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-sm);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 400px;
    }

    .nav-link {
        width: 100%;
        padding: var(--spacing-sm);
        text-align: center;
    }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--campus-red) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(255,255,255,.05) 35px, rgba(255,255,255,.05) 70px);
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(27, 43, 58, 0.7);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: #008a43;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 166, 81, 0.4);
}

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

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

.btn-course {
    background-color: var(--campus-red);
    color: var(--white);
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 0.95rem;
}

.btn-course:hover {
    background-color: #a00d25;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.4);
}

.btn-submit {
    width: 100%;
    margin-top: var(--spacing-sm);
}

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: var(--spacing-xl) 0;
}

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

.section-title {
    font-size: 2.5rem;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--campus-red), var(--academic-gold));
    border-radius: 2px;
}

.section-description {
    font-size: 1.2rem;
    color: var(--dark-gray);
    max-width: 700px;
    margin: 0 auto;
    margin-top: var(--spacing-md);
}

/* ========================================
   About / Features Section
   ======================================== */
.about {
    background-color: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1.3rem;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.feature-description {
    color: var(--dark-gray);
    font-size: 1rem;
}

/* ========================================
   Courses Section
   ======================================== */
.courses {
    background-color: var(--white);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.course-card {
    background-color: var(--white);
    border: 2px solid var(--medium-gray);
    border-radius: 12px;
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    border-color: var(--campus-red);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.course-featured {
    border-color: var(--academic-gold);
    background: linear-gradient(135deg, var(--white) 0%, #fffef8 100%);
}

.course-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
}

.course-title {
    font-size: 1.5rem;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.course-duration {
    color: var(--campus-red);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.course-description {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    line-height: 1.6;
}

.course-video {
    margin: var(--spacing-md) 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.course-video video {
    width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   Testimonials Section
   ======================================== */
.testimonials {
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--medium-gray) 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.testimonial-card {
    background-color: var(--white);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}

.testimonial-content {
    position: relative;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.quote-icon {
    font-size: 4rem;
    color: var(--academic-gold);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.testimonial-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-color);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--light-gray);
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--campus-red), var(--primary-navy));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.avatar-initials {
    color: var(--white);
    font-weight: 700;
    font-size: 1.2rem;
}

.author-info {
    flex-grow: 1;
}

.author-name {
    font-size: 1.1rem;
    color: var(--primary-navy);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.author-role {
    color: var(--dark-gray);
    font-size: 0.95rem;
    margin-bottom: 0.15rem;
}

.author-company {
    color: var(--campus-red);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.course-badge {
    display: inline-block;
    background-color: var(--academic-gold);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 0.25rem;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background-color: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

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

.info-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    padding: var(--spacing-md);
    background-color: var(--light-gray);
    border-radius: 8px;
    transition: var(--transition);
}

.info-item:hover {
    background-color: var(--medium-gray);
    transform: translateX(5px);
}

.info-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.info-content h3 {
    color: var(--primary-navy);
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.info-content a {
    color: var(--campus-red);
    font-weight: 500;
}

.info-content a:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-navy);
    font-weight: 600;
    font-size: 0.95rem;
}

.required {
    color: var(--campus-red);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition);
    background-color: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--campus-red);
    box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.error-message {
    display: none;
    color: var(--campus-red);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: var(--campus-red);
}

.form-group.error .error-message {
    display: block;
}

.form-success {
    background-color: var(--tropical-green);
    color: var(--white);
    padding: var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    margin-top: var(--spacing-md);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--primary-navy);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-sm);
}

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

.footer-title {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--academic-gold);
}

.footer-links,
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links a,
.footer-contact a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--academic-gold);
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.8rem;
    }

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

    .whatsapp-float {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }

    .whatsapp-icon {
        width: 28px;
        height: 28px;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .contact-form {
        padding: var(--spacing-md);
    }
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeIn 1s ease-out;
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--campus-red);
    outline-offset: 2px;
}

/* Skip to content link for screen readers */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--campus-red);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}