/* ==============================================
   CANARY ENGLISH Landing Page - Custom CSS
   ============================================== */

/* CSS Custom Properties (Variables) */
:root {
    --primary-color: #0d6efd;
    --primary-dark: #0a58ca;
    --primary-light: #6ea8fe;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --white: #ffffff;

    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-heading: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 1rem;

    --transition-base: all 0.3s ease;
    --box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

a {
    transition: var(--transition-base);
}

/* Header Styles */
#main-header {
    transition: var(--transition-base);
    z-index: 1000;
}

#main-header.scrolled {
    box-shadow: var(--box-shadow);
}

.navbar-brand {
    font-weight: 700;
    transition: var(--transition-base);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    color: var(--dark-color);
    position: relative;
    transition: var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

/* Hero Section */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0a58ca 100%);
}

.min-vh-75 {
    min-height: 75vh;
}

.wave-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
}

.wave-divider svg {
    display: block;
    width: 100%;
    height: auto;
}

.stat-box {
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    transition: var(--transition-base);
}

.stat-box:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.2) !important;
}

/* Section Heading */
.section-heading {
    margin-bottom: 3rem;
}

.letter-spacing-1 {
    letter-spacing: 1px;
}

.heading-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

/* Feature Cards */
.feature-card {
    transition: var(--transition-base);
    border-radius: var(--border-radius-lg);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-lg);
}

.icon-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hover-lift {
    transition: var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-lg);
}

/* Step Numbers */
.step-number {
    flex-shrink: 0;
    font-size: 1.5rem;
}

/* Teacher Cards */
.teacher-card {
    transition: var(--transition-base);
}

.teacher-card:hover .teacher-image img {
    transform: scale(1.1);
}

.teacher-image {
    overflow: hidden;
    border-radius: 50%;
}

.teacher-image img {
    transition: transform 0.3s ease;
}

/* Testimonials */
.testimonial-card {
    transition: var(--transition-base);
}

.testimonial-card:hover {
    transform: scale(1.02);
}

#testimonialsCarousel .carousel-control-prev,
#testimonialsCarousel .carousel-control-next {
    width: 50px;
    height: 50px;
    top: 50%;
    transform: translateY(-50%);
}

/* Gallery */
.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.gallery-image {
    transition: transform 0.3s ease;
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.gallery-item:hover .gallery-image {
    transform: scale(1.1);
}

/* Gallery Lightbox */
.gallery-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    padding: 10px 20px;
    transition: var(--transition-base);
    border-radius: var(--border-radius);
}

.lightbox-close {
    top: 20px;
    right: 20px;
    font-size: 3rem;
    line-height: 1;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background-color: rgba(255, 255, 255, 0.4);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

/* Back to Top Button */
#backToTop {
    z-index: 999;
    transition: var(--transition-base);
    border: none;
}

#backToTop:hover {
    transform: translateY(-5px);
}

/* Modal Customization */
.modal-content {
    border-radius: var(--border-radius-lg);
}

.modal-header {
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

/* Form Styles */
.form-control,
.form-select {
    border-radius: var(--border-radius);
    border: 1px solid #dee2e6;
    padding: 0.75rem;
    transition: var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.invalid-feedback {
    display: none;
    font-size: 0.875rem;
    color: var(--danger-color);
    margin-top: 0.25rem;
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-invalid ~ .invalid-feedback,
.form-select.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Buttons */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 0.625rem 1.5rem;
    transition: var(--transition-base);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.btn-warning:hover {
    background-color: #ffb300;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
}

.cta-button {
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.cta-button:hover::before {
    width: 300px;
    height: 300px;
}

/* Accordion */
.accordion-button {
    background-color: var(--white);
    color: var(--dark-color);
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary-color);
    color: var(--white);
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--primary-color);
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease-in forwards;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    animation: fadeInLeft 0.8s ease-in forwards;
}

.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    animation: fadeInRight 0.8s ease-in forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

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

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

/* Loading Animation */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Footer */
#main-footer {
    margin-top: 0;
}

#main-footer a:hover {
    color: var(--primary-light) !important;
}

.social-links .btn {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.social-links .btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

/* Responsive Design */

/* Tablet (768px - 991px) */
@media (max-width: 991px) {
    .display-3 {
        font-size: 2.5rem;
    }

    .display-5 {
        font-size: 2rem;
    }

    .hero-section {
        padding: 3rem 0;
    }

    .min-vh-75 {
        min-height: auto;
    }

    .navbar-collapse {
        background-color: var(--white);
        padding: 1rem;
        margin-top: 1rem;
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow);
    }

    .nav-link::after {
        display: none;
    }
}

/* Mobile (576px - 767px) */
@media (max-width: 767px) {
    .display-3 {
        font-size: 2rem;
    }

    .display-4 {
        font-size: 2rem;
    }

    .display-5 {
        font-size: 1.75rem;
    }

    .lead {
        font-size: 1rem;
    }

    section {
        padding: 2rem 0 !important;
    }

    .py-5 {
        padding-top: 2rem !important;
        padding-bottom: 2rem !important;
    }

    .icon-circle {
        width: 60px;
        height: 60px;
    }

    .gallery-image {
        height: 150px;
    }

    .lightbox-close,
    .lightbox-prev,
    .lightbox-next {
        padding: 5px 10px;
        font-size: 1.5rem;
    }

    .step-number {
        width: 40px !important;
        height: 40px !important;
        font-size: 1.2rem;
    }

    .teacher-image img {
        width: 150px !important;
        height: 150px !important;
    }
}

/* Small Mobile (< 576px) */
@media (max-width: 575px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .modal-lg {
        margin: 0.5rem;
    }

    .stat-box {
        padding: 0.75rem !important;
    }

    .stat-box h3 {
        font-size: 1.5rem;
    }

    .feature-card {
        padding: 1.5rem !important;
    }

    #backToTop {
        width: 40px !important;
        height: 40px !important;
        margin: 1rem !important;
    }
}

/* Accessibility */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .no-print,
    #main-header,
    #main-footer,
    .cta-button,
    #backToTop,
    #contactModal {
        display: none !important;
    }
}

/* Performance Optimizations */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy-load.loaded {
    opacity: 1;
}

/* Smooth Scrolling for Older Browsers */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}