/**
 * CityFlow Solutions - Main Stylesheet
 * Modern, accessible, and performant CSS
 */

/* ========================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ======================================== */
:root {
    /* Brand Colors */
    --primary-navy: #2B4C8C;
    --primary-blue: #4A90E2;
    --accent-orange: #FF6B35;
    --success-green: #4CAF50;
    --warning-yellow: #FFC107;
    --error-red: #F44336;

    /* Neutral Colors */
    --text-dark: #1A1A1A;
    --text-light: #666666;
    --background: #FFFFFF;
    --background-light: #F5F7FA;
    --white: #ffffff;
    --gray-100: #f0f0f0;
    --gray-200: #e0e0e0;
    --gray-800: #222;
    --gray-900: #111;

    /* Typography */
    --font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 10px;
    --spacing-sm: 15px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    --spacing-2xl: 50px;
    --spacing-3xl: 60px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 15px;
    --radius-lg: 20px;
    --radius-full: 50px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.3);

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-fixed: 1000;
    --z-modal: 2000;
    --z-tooltip: 3000;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {

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

body {
    font-family: var(--font-family);
    color: var(--text-dark);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

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

/* Focus styles for accessibility */
:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-navy);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: var(--z-tooltip);
    border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
    top: 0;
}

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

.section-padding {
    padding: 100px 0;
}

/* ========================================
   NAVIGATION
   ======================================== */
nav[role="navigation"] {
    position: fixed;
    top: 0;
    width: 100%;
    background: white;
    z-index: var(--z-fixed);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    height: 64px;
    display: flex;
    align-items: center;
    transition: var(--transition-base);
}

nav[role="navigation"].scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    width: 100%;
    gap: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-navy);
    text-decoration: none;
    transition: var(--transition-base);
    white-space: nowrap;
}

.logo:hover {
    opacity: 0.85;
}

.logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.logo i {
    color: var(--primary-blue);
    font-size: 2rem;
}

.nav-links {
    display: flex;
    gap: 40px;
    align-items: center;
    justify-content: center;
}

.nav-links a {
    font-weight: var(--font-weight-medium);
    position: relative;
    color: var(--text-dark);
    font-size: 0.95rem;
    transition: var(--transition-base);
    white-space: nowrap;
}

.nav-links a:not(.btn-download-small):hover {
    color: var(--primary-blue);
}

.nav-links a:not(.btn-download-small)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width var(--transition-base);
}

.nav-links a:not(.btn-download-small):hover::after {
    width: 100%;
}

.btn-download-small {
    background: var(--primary-navy);
    color: white;
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: var(--font-weight-semibold);
    font-size: 0.95rem;
    border: none;
    white-space: nowrap;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(43, 76, 140, 0.2);
}

/* Ensure white text on download button with higher specificity */
.nav-links .btn-download-small {
    color: white !important;
}

.btn-download-small:hover {
    background: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-navy);
    background: none;
    border: none;
    padding: var(--spacing-xs);
    min-width: 44px;
    min-height: 44px;
}

.mobile-menu-btn:hover {
    color: var(--primary-blue);
}

/* Mobile Menu */
.mobile-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-lg);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    z-index: var(--z-dropdown);
}

.mobile-nav.active {
    max-height: 400px;
    padding: var(--spacing-md);
    border-bottom: 3px solid var(--primary-blue);
}

.mobile-nav a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--gray-100);
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
    transition: var(--transition-base);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
}

.mobile-nav a:last-child {
    border-bottom: none;
    background: var(--primary-navy);
    color: white;
    text-align: center;
    margin-top: var(--spacing-sm);
}

.mobile-nav a:hover {
    background: var(--background-light);
    padding-left: calc(var(--spacing-md) + 10px);
}

.mobile-nav a:last-child:hover {
    background: var(--primary-blue);
    padding-left: var(--spacing-md);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    padding: 130px 0 100px;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
    color: white;
    position: relative;
    overflow: hidden;
    min-height: 600px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://www.transparenttextures.com/patterns/cubes.png');
    opacity: 0.1;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.2rem;
    margin-bottom: 35px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-btns {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.play-store-badge {
    display: inline-block;
    transition: var(--transition-base);
}

.play-store-badge img {
    height: 60px;
    width: auto;
}

.play-store-badge:hover {
    transform: scale(1.05);
}

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

.hero-image img {
    max-width: 320px;
    filter: drop-shadow(0 20px 50px rgba(0, 0, 0, 0.3));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {

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

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

/* ========================================
   SECTION TITLES
   ======================================== */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
}

.section-title p {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
}

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

.feature-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    border: 1px solid var(--gray-100);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-blue);
    box-shadow: 0 15px 40px rgba(74, 144, 226, 0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--background-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: var(--primary-blue);
    transition: var(--transition-base);
}

.feature-card:hover .feature-icon {
    background: var(--primary-blue);
    color: white;
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-navy);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   SCREENSHOTS SLIDER
   ======================================== */
.screenshots-slider {
    background: var(--background-light);
    overflow: hidden;
    padding: 100px 0;
}

.slider-track {
    display: flex;
    gap: var(--spacing-md);
    width: max-content;
    animation: scroll 40s linear infinite;
}

.slider-track:hover {
    animation-play-state: paused;
}

.screenshot-item {
    width: 250px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
}

.screenshot-item:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.screenshot-item img {
    width: 100%;
    display: block;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-270px * 6));
    }
}

/* ========================================
   STATS SECTION
   ======================================== */
.stats {
    background: var(--primary-navy);
    color: white;
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item h3 {
    font-size: 3rem;
    margin-bottom: 5px;
    color: var(--accent-orange);
}

.stat-item p {
    font-weight: var(--font-weight-medium);
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

/* ========================================
   WHY CITYFLOW SECTION
   ======================================== */
.why-cityflow {
    background: white;
}

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

.benefit-item {
    padding: var(--spacing-lg);
    background: var(--background-light);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.benefit-item:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.benefit-item h4 {
    font-size: 1.4rem;
    color: var(--primary-navy);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.benefit-item h4 i {
    color: var(--primary-blue);
    font-size: 1.5rem;
}

.benefit-item p {
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */
.testimonials {
    background: var(--background-light);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
    line-height: 1.7;
    font-size: 1.05rem;
}

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

.user-avatar {
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: var(--font-weight-bold);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.testimonial-user strong {
    display: block;
    color: var(--text-dark);
    font-size: 1rem;
}

.testimonial-user p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0;
}

/* ========================================
   CTA FINAL SECTION
   ======================================== */
.cta-final {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #ff8c42 100%);
    color: white;
    text-align: center;
    padding: 100px 0;
}

.cta-final h2 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.cta-final p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   FOOTER
   ======================================== */
footer {
    background: var(--gray-900);
    color: white;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    display: block;
    color: white;
}

.footer-about p {
    color: #aaa;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.footer-links h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: #aaa;
    font-size: 0.95rem;
    transition: var(--transition-base);
}

.footer-links ul li a:hover {
    color: white;
    padding-left: 5px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-base);
}

.social-links a:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-800);
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

/* ========================================
   PAGE VIEWS (SPA)
   ======================================== */
.page-view {
    display: none;
}

.page-view.active {
    display: block;
}

/* ========================================
   LEGAL PAGES
   ======================================== */
.legal-page {
    padding: 140px 0 100px;
    background: var(--background-light);
}

.legal-content {
    background: white;
    padding: var(--spacing-3xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    margin: 0 auto;
}

.legal-content h1 {
    color: var(--primary-navy);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--background-light);
    padding-bottom: var(--spacing-md);
    font-size: 2.5rem;
}

.legal-content h2 {
    margin: var(--spacing-xl) 0 var(--spacing-md);
    font-size: 1.5rem;
    color: var(--primary-navy);
}

.legal-content h3 {
    margin: 25px 0 var(--spacing-sm);
    font-size: 1.2rem;
    color: var(--primary-blue);
}

.legal-content p,
.legal-content ul {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
    text-align: justify;
    line-height: 1.8;
}

.legal-content ul {
    padding-left: var(--spacing-md);
    list-style: disc;
}

.legal-content li {
    margin-bottom: var(--spacing-xs);
}

.legal-content strong {
    color: var(--text-dark);
    font-weight: var(--font-weight-semibold);
}

/* ========================================
   ANIMATIONS
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

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

    .section-padding {
        padding: 80px 0;
    }
}

/* Desktop - Explicit visibility */
@media (min-width: 769px) {
    .nav-links {
        display: flex !important;
    }

    .mobile-menu-btn {
        display: none !important;
    }

    .mobile-nav {
        display: none !important;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

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

    .mobile-nav {
        display: block;
    }

    .hero {
        padding: 110px 0 60px;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text p {
        font-size: 1rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

    .section-padding {
        padding: 60px 0;
    }

    .legal-content {
        padding: var(--spacing-lg);
    }

    .legal-content h1 {
        font-size: 2rem;
    }

    .cta-final h2 {
        font-size: 2rem;
    }

    .features-grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .feature-card,
    .benefit-item,
    .testimonial-card {
        padding: var(--spacing-md);
    }

    .stat-item h3 {
        font-size: 2.5rem;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {

    nav,
    .hero,
    .cta-final,
    footer,
    .mobile-menu-btn {
        display: none;
    }

    .legal-content {
        box-shadow: none;
        padding: 0;
    }

    body {
        color: black;
    }

    a {
        text-decoration: underline;
    }
}

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

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

.mt-1 {
    margin-top: var(--spacing-xs);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-xs);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}