/* ========================================
   Topcu Bul - Mobile-First CSS
   Clean Architecture - Single File
   ======================================== */

/* ========================================
   CSS Variables
   ======================================== */
:root {
    /* Colors */
    --primary-color: #10B981;
    --primary-dark: #059669;
    --primary-light: #34D399;
    --secondary-color: #F59E0B;
    --accent-color: #8B5CF6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #10B981 0%, #059669 100%);
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);

    /* Light Theme (Default) */
    --background-color: #F8FAFC;
    --background-white: #FFFFFF;
    --background-dark: #0F172A;

    /* Text */
    --text-dark: #1E293B;
    --text-light: #64748B;
    --text-muted: #94A3B8;
    --text-white: #F8FAFC;

    /* Border & Shadow */
    --border-color: #E2E8F0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Font Sizes */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 2rem;
    --font-4xl: 2.5rem;

    /* Container */
    --container-max: 1280px;
    --container-padding: 1rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* ========================================
   Dark Theme
   ======================================== */
[data-theme="dark"] {
    --background-color: #0F172A;
    --background-white: #1E293B;
    --background-dark: #020617;

    --text-dark: #F1F5F9;
    --text-light: #94A3B8;
    --text-muted: #64748B;

    --border-color: #334155;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
}

/* ========================================
   Reset & Base (Mobile First)
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: var(--font-base);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-color);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-dark);
}

/* Mobile-first font sizes */
h1 { font-size: var(--font-2xl); }
h2 { font-size: var(--font-xl); }
h3 { font-size: var(--font-lg); }
h4 { font-size: var(--font-base); }

p { margin-bottom: var(--spacing-md); }

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

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

ul, ol { list-style: none; }

button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   Animation (Single FadeIn Only)
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.stagger-children.is-visible > * { opacity: 1; transform: translateY(0); }
.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 0.6s; }

/* ========================================
   Layout
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.section-title h2 .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title p {
    color: var(--text-light);
    max-width: 540px;
    margin: 0 auto;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--background-white);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

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

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--container-padding);
    max-width: var(--container-max);
    margin: 0 auto;
}

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

.logo img {
    height: 36px;
    width: auto;
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-size: var(--font-lg);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Mobile: Hide nav list, show toggle */
.nav-list {
    display: none;
}

.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

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

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

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

/* Mobile Nav Open State */
.nav.active .nav-list {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background-white);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.nav-link {
    display: block;
    padding: var(--spacing-md);
    font-weight: 500;
    color: var(--text-dark);
    border-bottom: 1px solid var(--border-color);
}

.nav-link:last-child {
    border-bottom: none;
}

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

/* Header Controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--background-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    width: 18px;
    height: 18px;
}

.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Language Switcher */
.lang-switcher {
    display: flex;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.lang-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--text-muted);
    transition: all var(--transition-normal);
}

.lang-btn:hover { color: var(--text-dark); }

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-base);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    color: white;
    opacity: 0.9;
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-lg);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-sm);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    padding: 100px 0 var(--spacing-2xl);
}

.hero-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    text-align: center;
}

.hero-content {
    color: var(--text-white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary-light);
    border-radius: 50%;
}

.hero-title {
    font-size: var(--font-3xl);
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--font-base);
    opacity: 0.85;
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

/* Store Buttons */
.store-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: background var(--transition-normal);
}

.store-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.store-btn-icon {
    width: 28px;
    height: 28px;
    opacity: 0.9;
}

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

.store-btn-text small {
    display: block;
    font-size: var(--font-xs);
    opacity: 0.7;
}

.store-btn-text span {
    display: block;
    font-weight: 600;
    font-size: var(--font-base);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.hero-stat-number {
    font-size: var(--font-2xl);
    font-weight: 800;
    display: block;
    color: var(--text-white);
}

.hero-stat-label {
    font-size: var(--font-xs);
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
}

.phone-screenshots {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: var(--spacing-md);
}

.phone-device img {
    max-width: 140px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
    border-radius: 24px;
}

.phone-device.android-phone img {
    max-width: 130px;
    border-radius: 20px;
}

.phone-label {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--background-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    font-size: var(--font-xs);
    font-weight: 600;
    color: var(--text-dark);
    white-space: nowrap;
}

.phone-device {
    position: relative;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    background: var(--background-color);
}

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

.feature-card {
    background: var(--background-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-title {
    font-size: var(--font-lg);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.feature-description {
    color: var(--text-light);
    line-height: 1.7;
    font-size: var(--font-sm);
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    background: var(--gradient-hero);
    text-align: center;
}

.cta-content {
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-title {
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
    font-size: var(--font-xl);
    font-weight: 800;
}

.cta-description {
    font-size: var(--font-base);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 40px;
}

.footer-logo-text {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-white);
}

.footer-description {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-sm);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--primary-color);
    color: white;
}

.footer-title {
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-sm);
    transition: color var(--transition-normal);
}

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

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-xs);
    margin-bottom: var(--spacing-md);
}

.footer-legal {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-xs);
}

.footer-legal a:hover {
    color: var(--primary-light);
}

/* ========================================
   Page Header (Inner Pages)
   ======================================== */
.page-header {
    background: var(--gradient-hero);
    padding: 120px 0 var(--spacing-2xl);
    text-align: center;
    color: white;
}

.page-header h1 {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-2xl);
    font-weight: 800;
}

.page-header p {
    opacity: 0.85;
    font-size: var(--font-base);
    max-width: 540px;
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    font-size: var(--font-xs);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a:hover {
    color: var(--primary-light);
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Content Pages
   ======================================== */
.content-page {
    background: var(--background-white);
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--container-padding);
}

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

.content-wrapper h3 {
    font-size: var(--font-lg);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.content-wrapper p {
    color: var(--text-light);
    line-height: 1.8;
}

.content-wrapper ul,
.content-wrapper ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.content-wrapper li {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    list-style: disc;
}

.content-wrapper ol li {
    list-style: decimal;
}

.last-updated {
    color: var(--text-muted);
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

/* ========================================
   About Page
   ======================================== */
.about-section {
    padding: var(--spacing-xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-content h2 {
    margin-bottom: var(--spacing-md);
}

.about-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.values-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.value-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.value-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-sm);
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-icon i {
    font-size: 1.25rem;
    color: white;
}

.value-card h3 {
    font-size: var(--font-base);
    margin-bottom: var(--spacing-xs);
}

.value-card p {
    color: var(--text-light);
    font-size: var(--font-sm);
}

/* ========================================
   Contact Page
   ======================================== */
.contact-section {
    padding: var(--spacing-xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.contact-info h2 {
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.contact-item-icon {
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item-icon i {
    color: white;
    font-size: 1rem;
}

.contact-item-content h4 {
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-xs);
}

.contact-item-content p {
    color: var(--text-light);
    font-size: var(--font-sm);
    margin: 0;
}

.contact-form-wrapper {
    background: var(--background-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 500;
    color: var(--text-dark);
    font-size: var(--font-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-base);
    transition: border-color var(--transition-fast);
    background: var(--background-white);
    color: var(--text-dark);
}

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

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

.form-group input.error,
.form-group textarea.error,
.form-group select.error {
    border-color: #dc3545;
}

/* ========================================
   FAQ Page
   ======================================== */
.faq-section {
    padding: var(--spacing-xl) 0;
}

.faq-categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
}

.faq-category-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: var(--font-sm);
    color: var(--text-dark);
    background: var(--background-color);
    transition: all var(--transition-normal);
}

.faq-category-btn:hover,
.faq-category-btn.active {
    background: var(--primary-color);
    color: white;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    background: var(--background-white);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: var(--font-base);
    text-align: left;
    background: var(--background-white);
    color: var(--text-dark);
}

.faq-question i {
    color: var(--primary-color);
    transition: transform var(--transition-normal);
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.faq-item.active .faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.7;
    font-size: var(--font-sm);
}

/* ========================================
   Utilities
   ======================================== */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-muted { color: var(--text-muted); }

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

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 9999;
}

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

/* ========================================
   TABLET (min-width: 600px)
   ======================================== */
@media (min-width: 600px) {
    :root {
        --container-padding: 1.5rem;
    }

    h1 { font-size: var(--font-3xl); }
    h2 { font-size: var(--font-2xl); }

    .hero-title { font-size: var(--font-4xl); }
    .hero-subtitle { font-size: var(--font-lg); }

    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-xl);
    }

    .phone-device img { max-width: 180px; }
    .phone-device.android-phone img { max-width: 170px; }

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

    .cta-title { font-size: var(--font-2xl); }

    .cta-buttons {
        flex-direction: row;
        justify-content: center;
    }

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

    .footer-logo,
    .footer-social {
        justify-content: flex-start;
    }

    .footer-links {
        align-items: flex-start;
    }

    .page-header h1 { font-size: var(--font-3xl); }

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

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

/* ========================================
   DESKTOP (min-width: 900px)
   ======================================== */
@media (min-width: 900px) {
    h1 { font-size: var(--font-4xl); }
    h2 { font-size: var(--font-3xl); }

    .section { padding: var(--spacing-3xl) 0; }

    /* Show desktop nav, hide toggle */
    .nav-list {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
    }

    .nav.active .nav-list {
        position: static;
        flex-direction: row;
        background: none;
        padding: 0;
        box-shadow: none;
    }

    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        border-bottom: none;
        border-radius: var(--radius-md);
    }

    .menu-toggle { display: none; }

    .logo img { height: 44px; }
    .logo-text { font-size: var(--font-xl); }

    /* Hero */
    .hero { min-height: 100vh; }

    .hero-container {
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-3xl);
    }

    .hero-content { flex: 1; }
    .hero-image { flex: 1; }

    .hero-buttons { justify-content: flex-start; }

    .phone-device img { max-width: 240px; }
    .phone-device.android-phone img { max-width: 220px; }

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

    .feature-card { padding: var(--spacing-2xl); }

    .feature-icon {
        width: 70px;
        height: 70px;
    }

    .feature-icon i { font-size: 1.75rem; }

    /* CTA */
    .cta-content { padding: var(--spacing-2xl); }
    .cta-title { font-size: var(--font-3xl); }

    /* Footer */
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: left;
    }

    .footer-copyright { margin-bottom: 0; }

    /* Page Header */
    .page-header {
        padding: 160px 0 80px;
    }

    .page-header h1 { font-size: var(--font-4xl); }
    .page-header p { font-size: var(--font-lg); }

    /* About */
    .about-grid {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }

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

/* ========================================
   LARGE DESKTOP (min-width: 1200px)
   ======================================== */
@media (min-width: 1200px) {
    .hero-title { font-size: 3.5rem; }

    .phone-device img { max-width: 280px; }
    .phone-device.android-phone img { max-width: 260px; }
}

/* ========================================
   Reduced Motion
   ======================================== */
@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;
    }

    [data-animate] {
        opacity: 1 !important;
        transform: none !important;
    }

    .stagger-children > * {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .header,
    .footer,
    .hero-buttons,
    .cta,
    .menu-toggle {
        display: none !important;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    .page-header {
        background: none;
        color: #000;
        padding: 20pt 0;
    }
}