/* ================================
   Onur Yeşilçavdar - Modern Website
   ================================ */

/* === CSS Variables & Design Tokens === */
:root {
    /* Colors - Mavi/Turkuaz Tema */
    --primary-blue: #1a5fb4;
    --primary-cyan: #00b4d8;
    --accent-orange: #ff9500;
    --dark-blue: #0d2b52;
    --light-blue: #90e0ef;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1a5fb4 0%, #00b4d8 100%);
    --gradient-hero: linear-gradient(135deg, #0d2b52 0%, #1a5fb4 50%, #00b4d8 100%);
    --gradient-accent: linear-gradient(135deg, #00b4d8 0%, #90e0ef 100%);

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --black: #000000;

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

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* 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-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === Global Resets === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    color: var(--gray-900);
    background-color: var(--gray-50);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-blue);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--gray-700);
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 5px var(--spacing-lg) !important;
    display: flex !important;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-fast);
}

.logo img {
    height: 40px !important;
    width: auto !important;
    display: block;
    transition: var(--transition-base);
}

.logo:hover img {
    transform: scale(1.05);
}

.logo:hover {
    color: var(--primary-cyan);
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    list-style: none;
}

.nav-links a {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-right {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 30px !important;
}

.nav-socials {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 15px !important;
}

.nav-socials a {
    color: var(--primary-blue);
    font-size: 1.4rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-socials a:hover {
    color: var(--primary-cyan);
    transform: scale(1.1);
}

.nav-cta {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 6px 16px !important;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

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

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: calc(80px + var(--spacing-xl)) var(--spacing-lg) var(--spacing-xl);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 180, 216, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(26, 95, 180, 0.2) 0%, transparent 50%);
    animation: gradientShift 10s ease infinite;
}

@keyframes gradientShift {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

.hero-content {
    max-width: 1400px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.btn-primary {
    background: var(--white);
    color: var(--primary-blue);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

.hero-image {
    position: relative;
    animation: fadeInRight 1s ease 0.4s backwards;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

/* === Stats Section === */
.stats-section {
    background: var(--white);
    padding: var(--spacing-3xl) var(--spacing-lg);
    margin-top: calc(-1 * var(--spacing-3xl));
    position: relative;
    z-index: 2;
}

.stats-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    background: linear-gradient(135deg, rgba(26, 95, 180, 0.05) 0%, rgba(0, 180, 216, 0.05) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid transparent;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-base);
    z-index: -1;
}

.stat-card:hover::before {
    opacity: 0.1;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-cyan);
}

.stat-number {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    display: block;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--gray-700);
    font-weight: 600;
}

/* === Section Styling === */
.section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    background: var(--gradient-accent);
    color: var(--dark-blue);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-description {
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.25rem;
    color: var(--gray-700);
}

/* === Video Gallery === */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.video-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.video-thumbnail {
    position: relative;
    padding-top: 56.25%;
    /* 16:9 aspect ratio */
    background: var(--gray-200);
    overflow: hidden;
}

.video-thumbnail iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-info {
    padding: var(--spacing-md);
}

.video-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--dark-blue);
    margin-bottom: var(--spacing-xs);
}

.video-description {
    font-size: 0.95rem;
    color: var(--gray-700);
}

/* === Events Calendar === */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.event-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    display: flex;
    gap: var(--spacing-md);
    border-left: 4px solid var(--primary-blue);
}

.event-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--accent-orange);
}

.event-date {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 100px;
    text-align: center;
}

.event-day {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
}

.event-month {
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-top: var(--spacing-xs);
}

.event-details {
    padding: var(--spacing-md);
    flex: 1;
}

.event-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark-blue);
    margin-bottom: var(--spacing-xs);
}

.event-location {
    color: var(--gray-700);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* === Testimonials === */
.testimonials-slider {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.testimonial-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 8rem;
    font-weight: 800;
    color: var(--light-blue);
    opacity: 0.3;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-text {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--gray-700);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
    line-height: 1.8;
}

.testimonial-author {
    font-weight: 700;
    color: var(--primary-blue);
    font-size: 1.125rem;
}

.testimonial-role {
    color: var(--gray-700);
    font-size: 0.95rem;
}

.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xl);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: var(--transition-fast);
}

.dot.active {
    background: var(--gradient-primary);
    width: 32px;
    border-radius: 6px;
}

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

.contact-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.contact-info h2 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-xl);
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(8px);
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--accent-orange);
}

.contact-text a {
    color: var(--white);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
    transition: var(--transition-fast);
}

.contact-text a:hover {
    color: var(--accent-orange);
}

.contact-form {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

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

.form-group label {
    display: block;
    color: var(--dark-blue);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(26, 95, 180, 0.1);
}

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

.btn-submit {
    width: 100%;
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

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

/* === Footer === */
.footer {
    background: var(--dark-blue);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) var(--spacing-lg);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
    gap: var(--spacing-xl);
}

.footer-contact {
    display: flex !important;
    flex-direction: column !important;
    gap: 8px;
    text-align: left !important;
}

.footer-contact h4 {
    color: var(--accent-orange);
    font-size: 1.1rem;
    margin-bottom: 5px;
    font-family: var(--font-heading);
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-contact a:hover {
    color: var(--white);
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
    font-size: 1.4rem;
    transition: var(--transition-base);
}

.social-link:hover {
    background: var(--accent-orange);
    transform: translateY(-4px);
    box-shadow: 0 4px 15px rgba(255, 149, 0, 0.3);
}

.footer-text {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

.fade-in-up {
    animation: fadeInUp 0.8s ease;
}

/* Scroll animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* === Responsive Design === */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }

    .hero-image {
        order: -1;
    }

    .hero-image img {
        margin: 0 auto;
    }

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

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition-base);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .footer-contact {
        align-items: center;
        text-align: center;
    }

    .menu-toggle {
        display: flex;
    }

    .stats-container {
        grid-template-columns: 1fr;
    }

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

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

    .event-card {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

    .hero {
        padding-top: calc(70px + var(--spacing-lg));
    }

    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}