/* ===========================
   Variables & Reset
   =========================== */

:root {
    --color-primary: #DC2626;
    --color-secondary: #1E40AF;
    --color-accent: #0EA5E9;
    --color-dark: #1F2937;
    --color-gray: #6B7280;
    --color-light-gray: #F3F4F6;
    --color-white: #FFFFFF;

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ===========================
   Container & Utilities
   =========================== */

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

.section {
    padding: var(--spacing-xl) 0;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   Header & Navigation
   =========================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

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

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

.nav-link {
    font-weight: 500;
    color: var(--color-dark);
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
}

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

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

.language-switcher {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--color-light-gray);
    padding: 4px;
    border-radius: 8px;
}

.lang-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 6px;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.lang-btn img {
    width: 24px;
    height: auto;
}

.lang-btn.active {
    background: var(--color-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.lang-btn:hover {
    transform: scale(1.05);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* ===========================
   Hero Section
   =========================== */

.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
    background-image: url('../images/hero_bg.webp');
    background-size: cover;
    background-position: center;
    background-attachment: scroll;
    margin-top: 70px;
    margin-bottom: 0;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.85) 0%, rgba(14, 165, 233, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 10px 30px rgba(220, 38, 38, 0.3);
}

.btn-primary:hover {
    background: #B91C1C;
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(220, 38, 38, 0.4);
}

/* ===========================
   About Section
   =========================== */

.about {
    background: var(--color-white);
    position: relative;
    z-index: 10;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
}

.location-info {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    background: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-md);
    text-align: left;
}

.location-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.location-info p {
    margin: 0;
    color: var(--color-gray);
}

/* ===========================
   Services Section
   =========================== */

.services {
    background: var(--color-light-gray);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.service-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
}

.service-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.service-text {
    color: var(--color-gray);
    line-height: 1.7;
}

/* ===========================
   Booking Section
   =========================== */

.booking {
    background: var(--color-white);
}

.booking-widget {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: var(--color-light-gray);
    border-radius: var(--border-radius);
    min-height: 400px;
}

/* ===========================
   Instructors Section
   =========================== */

.instructors {
    background: var(--color-light-gray);
}

.instructors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.instructor-card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.instructor-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.instructor-image {
    width: 100%;
    height: 350px;
    overflow: hidden;
}

.instructor-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.instructor-card:hover .instructor-image img {
    transform: scale(1.05);
}

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

.instructor-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-dark);
}

.instructor-role {
    font-size: 0.95rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.instructor-bio {
    color: var(--color-gray);
    line-height: 1.7;
}

/* ===========================
   Terms Section
   =========================== */

.terms {
    background: var(--color-white);
}

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

.terms-card {
    background: var(--color-light-gray);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
}

.terms-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.terms-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.terms-card p {
    color: var(--color-gray);
    line-height: 1.7;
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo img {
    height: 60px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-info h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.footer-info p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xs);
}

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

.footer-info a:hover {
    color: var(--color-white);
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* ===========================
   Animations
   =========================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--color-white);
        padding: var(--spacing-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }

    .nav-link {
        display: block;
        padding: var(--spacing-sm);
        text-align: center;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

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

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

    .section-title {
        font-size: 1.75rem;
    }

    .services-grid,
    .instructors-grid,
    .terms-content {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }
}

/* ===========================
   Smooth Transitions
   =========================== */

.service-card,
.instructor-card,
.terms-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }

.instructor-card:nth-child(1) { animation-delay: 0.1s; }
.instructor-card:nth-child(2) { animation-delay: 0.2s; }
.instructor-card:nth-child(3) { animation-delay: 0.3s; }
.instructor-card:nth-child(4) { animation-delay: 0.4s; }