/* 1948 Tennis App - Modern Minimalist Design */
/* Tech color palette with electric blues and cyans */

:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --secondary: #06b6d4;
    --accent: #22d3ee;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --success: #10b981;
    --gradient-start: #0ea5e9;
    --gradient-end: #06b6d4;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (min-width: 768px) {
    h1 { font-size: 3.5rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 1.75rem; }
}

p {
    margin-bottom: 1rem;
    color: var(--gray);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--gray);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
    }
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--light) 0%, var(--white) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

@media (min-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr 1fr;
    }
}

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

.hero-content h1 {
    color: var(--dark);
    margin-bottom: 1.5rem;
}

.hero-content h1 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Device Mockup */
.device-mockup {
    position: relative;
    max-width: 280px;
    margin: 0 auto;
}

.device-frame {
    background: linear-gradient(145deg, #1a1a2e, #16213e);
    border-radius: 36px;
    padding: 12px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25),
                0 0 0 1px rgba(255, 255, 255, 0.1);
}

.device-screen {
    border-radius: 24px;
    overflow: hidden;
    background: var(--dark);
}

.device-screen img {
    width: 100%;
    height: auto;
    display: block;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    gap: 0.5rem;
    min-height: 48px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
    color: var(--white);
}

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

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-alt {
    background: var(--light);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    color: var(--dark);
    margin-bottom: 1rem;
}

.section-title p {
    max-width: 600px;
    margin: 0 auto;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    color: var(--dark);
    margin-bottom: 0.75rem;
}

.feature-card p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Screenshots Section */
.screenshots-section {
    padding: 4rem 0;
    max-height: 500px;
    overflow: hidden;
}

.screenshot-carousel {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.carousel-container {
    display: flex;
    overflow: hidden;
    border-radius: 12px;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-slide {
    min-width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.carousel-device {
    max-width: 220px;
    position: relative;
}

.carousel-device .device-frame {
    padding: 8px;
    border-radius: 28px;
}

.carousel-device .device-screen {
    border-radius: 20px;
}

.carousel-device .device-screen img {
    max-height: 320px;
    object-fit: contain;
    filter: blur(5px);
    transition: filter 0.3s ease;
}

.carousel-device .device-screen img.loaded {
    filter: blur(0);
}

.carousel-nav {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gray-light);
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    padding: 0;
}

.carousel-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid var(--gray-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--dark);
    transition: all 0.3s ease;
    z-index: 10;
}

.carousel-arrow:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.carousel-arrow.prev {
    left: -22px;
}

.carousel-arrow.next {
    right: -22px;
}

@media (max-width: 768px) {
    .carousel-arrow {
        width: 36px;
        height: 36px;
    }

    .carousel-arrow.prev {
        left: 10px;
    }

    .carousel-arrow.next {
        right: 10px;
    }

    .carousel-device {
        max-width: 180px;
    }

    .carousel-device .device-screen img {
        max-height: 260px;
    }
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 12px;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* CTA Section */
.cta-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    text-align: center;
}

.cta-section h2 {
    color: var(--white);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.cta-section .btn-primary {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.cta-section .btn-primary:hover {
    background: var(--light);
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--gray-light);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.footer-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    color: var(--gray-light);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--dark-light);
    font-size: 0.875rem;
}

/* Privacy/Terms/Contact Pages */
.page-header {
    padding: 8rem 0 3rem;
    background: linear-gradient(135deg, var(--light) 0%, var(--white) 100%);
    text-align: center;
}

.page-header h1 {
    color: var(--dark);
}

.content-section {
    padding: 4rem 0;
}

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

.content-wrapper h2 {
    color: var(--dark);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.content-wrapper h3 {
    color: var(--dark);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.content-wrapper p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.content-wrapper ul,
.content-wrapper ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.content-wrapper li {
    margin-bottom: 0.5rem;
    color: var(--gray);
}

.content-wrapper a {
    color: var(--primary);
    text-decoration: underline;
}

.content-wrapper a:hover {
    color: var(--primary-dark);
}

/* Contact Form */
.contact-card {
    background: var(--white);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--light);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.form-group input[type="file"] {
    padding: 0.75rem;
    background: var(--light);
}

.form-success {
    background: var(--success);
    color: var(--white);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    display: none;
}

.form-success.show {
    display: block;
}

/* Privacy Accept Button (Flutter Integration) */
.privacy-accept-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    display: none;
}

.privacy-accept-container.show {
    display: block;
}

.privacy-accept-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--success), #059669);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 56px;
}

.privacy-accept-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

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

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

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

.mt-2 {
    margin-top: 2rem;
}

/* Animations */
[data-aos] {
    opacity: 0;
    transition-property: opacity, transform;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(20px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-20px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(20px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .privacy-accept-container {
        display: none;
    }

    .content-wrapper {
        max-width: 100%;
    }
}