/*
 * PROJECT: Kite N Surf
 * DOMAIN: kite-n-surf.com
 * GAME: Tennis Dash Game
 * 
 * DESIGN:
 * - CSS: BEM
 * - Style: Modern Minimalism (#9)
 * - Palette: Ocean Adventure
 * - Effect: Glassmorphism
 * - Fonts: DM Sans + Work Sans
 * - Buttons: Gradient
 */

:root {
    /* Ocean Adventure Palette */
    --wave-blue: #006ba6;
    --surf-white: #f8fffe;
    --ocean-deep: #0353a4;
    --foam-light: #b9e5e8;
    --wind-cyan: #4ad5d5;
    --sand-beige: #ffb84d;
    --coral-pink: #ff6b9d;
    
    /* Typography */
    --font-heading: 'DM Sans', sans-serif;
    --font-body: 'Work Sans', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 4rem;
    
    /* Layout */
    --container-width: 1200px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 107, 166, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 107, 166, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 107, 166, 0.2);
    
    /* Glassmorphism */
    --glass-bg: rgba(248, 255, 254, 0.85);
    --glass-border: rgba(0, 107, 166, 0.2);
    --glass-backdrop: blur(10px);
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    max-width: 100%;
}

html {
    scroll-behavior: smooth;
}

html, body {
    overflow-x: hidden !important;
}

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--surf-white) 0%, var(--foam-light) 100%);
    color: var(--ocean-deep);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--ocean-deep);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--space-sm);
}

a {
    color: var(--wave-blue);
}

/* Header */
.header {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: var(--space-sm) 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--wave-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

.logo:hover {
    color: var(--wind-cyan);
}

.nav {
    display: flex;
    gap: var(--space-lg);
}

.nav__link {
    font-weight: 500;
    color: var(--ocean-deep);
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    position: relative;
}

.nav__link:hover,
.nav__link--active {
    color: var(--wave-blue);
    background: rgba(0, 107, 166, 0.1);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-xs);
}

.hamburger {
    display: block;
    width: 24px;
    height: 3px;
    background: var(--ocean-deep);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active .hamburger:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
    display: none;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--space-md) 0;
}

.mobile-menu.active {
    display: block;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding: 0 var(--space-md);
}

.mobile-nav__link {
    color: var(--ocean-deep);
    text-decoration: none;
    padding: var(--space-sm);
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    font-weight: 500;
}

.mobile-nav__link:hover {
    background: rgba(0, 107, 166, 0.1);
    color: var(--wave-blue);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--wave-blue), var(--wind-cyan));
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-family: var(--font-heading);
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--ocean-deep), var(--wave-blue));
    color: white;
}

.btn--secondary {
    background: linear-gradient(135deg, var(--sand-beige), var(--coral-pink));
}

.btn--secondary:hover {
    background: linear-gradient(135deg, var(--coral-pink), var(--sand-beige));
}

.btn--outline {
    background: transparent;
    color: var(--wave-blue);
    border: 2px solid var(--wave-blue);
    box-shadow: none;
}

.btn--outline:hover {
    background: var(--wave-blue);
    color: white;
}

/* Cards */
.card {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.article-card {
    position: relative;
}

.article-card__overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: var(--border-radius);
}

.article-card__content {
    position: relative;
}

.article-card__meta {
    font-size: 0.875rem;
    color: var(--ocean-deep);
    opacity: 0.7;
    margin-top: var(--space-xs);
}

.game-card {
    text-align: center;
    background: linear-gradient(135deg, var(--glass-bg), rgba(185, 229, 232, 0.6));
    position: relative;
}

.game-card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, var(--wave-blue), var(--wind-cyan));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

/* Hero Section */
.hero {
    padding: calc(var(--space-xxl) + 2rem) 0 var(--space-xxl);
    text-align: center;
    background: linear-gradient(135deg, var(--surf-white) 0%, var(--foam-light) 50%, rgba(74, 213, 213, 0.1) 100%);
    color: white;
}

.hero__title {
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--ocean-deep), var(--wave-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--ocean-deep);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Article Page Styles */
.article-page {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md);
}

.article-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--glass-border);
}

.article-header h1 {
    margin-bottom: var(--space-md);
    color: var(--ocean-deep);
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--ocean-deep);
    opacity: 0.8;
}

.article-meta .category {
    background: linear-gradient(135deg, var(--wave-blue), var(--wind-cyan));
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-content section {
    margin-bottom: var(--space-xl);
}

.article-content section:last-child {
    margin-bottom: var(--space-lg);
}

.article-content h2 {
    margin-bottom: var(--space-md);
    color: var(--wave-blue);
    position: relative;
    padding-left: var(--space-sm);
}

.article-content h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(135deg, var(--wave-blue), var(--wind-cyan));
    border-radius: 2px;
}

.article-content ul {
    margin: var(--space-md) 0;
    padding-left: var(--space-xl);
}

.article-content ul li {
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

.article-content ul li strong {
    color: var(--ocean-deep);
    font-weight: 600;
}

.article-content p strong {
    color: var(--ocean-deep);
    font-weight: 600;
}

.article-cta {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    text-align: center;
    margin: var(--space-xl) 0;
}

.article-cta h3 {
    margin-bottom: var(--space-sm);
    color: var(--ocean-deep);
}

.article-cta p {
    margin-bottom: var(--space-md);
}

.article-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 2px solid var(--glass-border);
}

.article-navigation {
    display: flex;
    justify-content: space-between;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.article-navigation a {
    color: var(--wave-blue);
    text-decoration: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    font-weight: 500;
}

.article-navigation a:hover {
    background: rgba(0, 107, 166, 0.1);
    color: var(--ocean-deep);
}

/* Sections */
.section {
    padding: var(--space-xxl) 0;
}

.section--alt {
    background: rgba(185, 229, 232, 0.3);
}

.section__header {
    text-align: center;
    margin-bottom: var(--space-xxl);
}

.section__title {
    margin-bottom: var(--space-md);
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--ocean-deep);
    max-width: 600px;
    margin: 0 auto;
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--space-lg);
}

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

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Feature List */
.feature-list {
    list-style: none;
    padding: 0;
    margin-top: var(--space-md);
}

.feature-list__item {
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--glass-border);
}

.feature-list__item--last {
    border-bottom: none;
}

/* FAQ Accordion */
.faq {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    padding: var(--space-md);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--ocean-deep);
    text-align: left;
    transition: color 0.3s ease;
}

.faq-question:hover {
    color: var(--wave-blue);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--wave-blue);
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: var(--space-sm);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 var(--space-md);
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 var(--space-md) var(--space-md);
}

.faq-answer p {
    color: var(--ocean-deep);
    line-height: 1.7;
}

/* Blog Cards */
.blog-card {
    display: flex;
    flex-direction: column;
    position: relative;
}

.blog-card__badge {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--wave-blue), var(--wind-cyan));
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
    align-self: flex-start;
}

.blog-card__badge--tips {
    background: linear-gradient(135deg, var(--sand-beige), #e6a030);
}

.blog-card__badge--advanced {
    background: linear-gradient(135deg, var(--coral-pink), #e04a7a);
}

.blog-card__content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-card__content h3 {
    margin-bottom: var(--space-sm);
}

.blog-card__content p {
    flex: 1;
}

.blog-card__meta {
    display: flex;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: var(--ocean-deep);
    opacity: 0.7;
    margin-bottom: var(--space-md);
}

.blog-card .btn {
    align-self: flex-start;
}

/* CTA Block */
.cta-block {
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--space-xxl) var(--space-lg);
    box-shadow: var(--shadow-md);
}

.cta-block__title {
    margin-bottom: var(--space-md);
}

.cta-block__text {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--space-lg);
}

/* Cookie Consent */
.cookie-consent {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    max-width: 400px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    z-index: 200;
}

.cookie-consent__content p {
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.cookie-consent__content a {
    color: var(--wave-blue);
}

/* Contact Info */
.contact-info {
    margin-top: var(--space-lg);
}

.contact-info__item {
    margin-bottom: var(--space-lg);
}

.contact-info__item h3 {
    margin-bottom: var(--space-xs);
    font-size: 1.25rem;
}

.contact-info__item a {
    color: var(--wave-blue);
    text-decoration: none;
}

.contact-info__item a:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    margin-top: var(--space-md);
}

/* Forms */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    color: var(--ocean-deep);
    font-family: var(--font-heading);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-sm);
    border: 2px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--ocean-deep);
    transition: border-color 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--wave-blue);
}

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

/* Legal Content */
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content__updated {
    font-style: italic;
    color: var(--ocean-deep);
    opacity: 0.7;
    margin-bottom: var(--space-xl);
}

.legal-content h2 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--glass-border);
}

.legal-content h3 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--wave-blue);
}

.legal-content ul {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

.legal-content ul li {
    margin-bottom: var(--space-xs);
    line-height: 1.7;
}

.legal-content a {
    color: var(--wave-blue);
    text-decoration: none;
}

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

/* About page styles */
.about-subtitle {
    margin-top: var(--space-lg);
    color: var(--wave-blue);
}

.about-list {
    margin-top: var(--space-sm);
    padding-left: var(--space-lg);
}

.about-list li {
    margin-bottom: var(--space-xs);
}

/* Values list */
.values-list {
    margin-top: var(--space-md);
}

.values-list__item {
    margin-bottom: var(--space-md);
}

.values-list__item:last-child {
    margin-bottom: 0;
}

.values-list__title {
    color: var(--wave-blue);
    margin-bottom: var(--space-xs);
}

/* How to play styles */
.controls-section {
    margin-top: var(--space-md);
}

.controls-section__item {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--glass-border);
}

.controls-section__item--last {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.controls-section__title {
    color: var(--wave-blue);
    margin-bottom: var(--space-xs);
}

.tip-heading {
    color: var(--wave-blue);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-xs);
}

.mistakes-list {
    margin-top: var(--space-md);
}

.mistakes-list__item {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--glass-border);
}

.mistakes-list__item--last {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.mistakes-list__title {
    color: var(--coral-pink);
    margin-bottom: var(--space-xs);
}

/* Footer */
.footer {
    background: var(--ocean-deep);
    color: var(--surf-white);
    padding: var(--space-xl) 0 var(--space-lg);
    margin-top: auto;
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer__title {
    color: var(--wind-cyan);
    margin-bottom: var(--space-md);
}

.footer__subtitle {
    color: var(--foam-light);
    margin-bottom: var(--space-md);
    font-size: 1.125rem;
}

.footer__text {
    line-height: 1.7;
    opacity: 0.9;
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--space-xs);
}

.footer__link {
    color: var(--surf-white);
    text-decoration: none;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer__link:hover {
    opacity: 1;
    color: var(--wind-cyan);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(248, 255, 254, 0.2);
}

.footer__copyright {
    opacity: 0.7;
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-sm {
    margin-bottom: var(--space-sm);
}

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

.mt-lg {
    margin-top: var(--space-lg);
}

.stars {
    color: #ffc107;
}

/* Responsive Design */
@media (max-width: 992px) {
    .grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .article-meta {
        gap: var(--space-md);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero__cta {
        flex-direction: column;
        align-items: center;
    }
    
    .container {
        padding: 0 var(--space-sm);
    }
    
    .grid {
        gap: var(--space-md);
    }
    
    .grid--2 {
        grid-template-columns: 1fr;
    }
    
    .grid--3 {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: var(--space-xl) 0;
    }
    
    .cookie-consent {
        bottom: var(--space-sm);
        right: var(--space-sm);
        left: var(--space-sm);
        max-width: none;
    }
    
    .article-page {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .article-meta {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: center;
    }
    
    .article-navigation {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
    
    .card {
        padding: var(--space-md);
        position: relative;
}
    
    .footer__content {
        gap: var(--space-lg);
    }
    
    .blog-card__meta {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .article-content {
        font-size: 1rem;
    }
    
    .article-content ul {
        padding-left: var(--space-lg);
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes wave {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.wave-animation {
    animation: wave 3s ease-in-out infinite;
}