/* ============================================
   Ekspera Support Website - Global Styles
   ============================================ */

/* CSS Custom Properties */
:root {
  /* Colors - From Mobile App Theme */
  --color-primary: #135bec;
  --color-primary-light: #4f85f6;
  --color-primary-hover: #0d4ac7;
  --color-secondary: #f59e0b;
  
  --color-bg-dark: #0f172a;
  --color-bg-surface: #1e293b;
  --color-bg-card: rgba(30, 41, 59, 0.6);
  --color-bg-card-hover: rgba(30, 41, 59, 0.9);
  
  --color-text-primary: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  
  --color-border: #334155;
  --color-border-light: rgba(255, 255, 255, 0.08);
  
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Typography */
  --font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* 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;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(79, 133, 246, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Layout */
  --max-width: 1100px;
  --header-height: 72px;
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.7;
  color: var(--color-text-secondary);
  background: var(--color-bg-dark);
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

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

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

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

strong {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

ul, ol {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

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

/* ============================================
   Header & Navigation
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

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

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

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  letter-spacing: -0.03em;
}

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

.nav-link {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: var(--color-border-light);
}

.nav-link.active {
  color: var(--color-primary-light);
  background: rgba(79, 133, 246, 0.12);
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  margin: 5px 0;
  transition: var(--transition-fast);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-main {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
  }
  
  .nav-main.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
    padding: var(--spacing-md);
  }
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  padding: var(--spacing-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(79, 133, 246, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-logo {
  width: 90px;
  height: auto;
  margin-bottom: var(--spacing-xl);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.03em;
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  max-width: 560px;
  margin: 0 auto var(--spacing-xl);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 14px 28px;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(19, 91, 236, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(19, 91, 236, 0.4);
}

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-card-hover);
  color: var(--color-text-primary);
  border-color: var(--color-text-muted);
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  background: var(--color-bg-card-hover);
  border-color: rgba(79, 133, 246, 0.2);
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(79, 133, 246, 0.12);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

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

.card-text {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  margin: var(--spacing-2xl) 0;
}

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

.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.stat-icon {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}

.stat-value {
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  margin-top: 4px;
}

/* ============================================
   Section Titles
   ============================================ */

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-light);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.section-desc {
  color: var(--color-text-secondary);
}

/* ============================================
   FAQ Section
   ============================================ */

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-icon {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--color-primary-light);
}

.faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text-secondary);
  display: none;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ============================================
   Contact Section
   ============================================ */

.contact-card {
  background: linear-gradient(135deg, rgba(79, 133, 246, 0.1) 0%, rgba(96, 165, 250, 0.05) 100%);
  border: 1px solid rgba(79, 133, 246, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-icon {
  width: 64px;
  height: 64px;
  background: rgba(79, 133, 246, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.75rem;
}

.contact-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

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

/* ============================================
   Content Pages (Privacy, Terms, etc.)
   ============================================ */

.content-page {
  padding: var(--spacing-2xl) 0 var(--spacing-3xl);
}

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

.content-header h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-sm);
}

.content-meta {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.content-body {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  max-width: 800px;
  margin: 0 auto;
}

.content-body h2 {
  font-size: var(--font-size-xl);
  margin: var(--spacing-xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border-light);
}

.content-body h2:first-child {
  margin-top: 0;
}

.highlight-box {
  background: rgba(79, 133, 246, 0.08);
  border: 1px solid rgba(79, 133, 246, 0.15);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.highlight-box p {
  margin: 0;
  color: var(--color-text-primary);
}

.warning-box {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.warning-box p {
  color: #fca5a5;
  margin: 0;
}

.warning-box p + p {
  margin-top: var(--spacing-sm);
}

/* Step Cards */
.step-card {
  background: rgba(79, 133, 246, 0.08);
  border: 1px solid rgba(79, 133, 246, 0.15);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-md) 0;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.step-number {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
}

.step-content {
  flex: 1;
}

.step-title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.step-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  border-top: 1px solid var(--color-border-light);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

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

.footer-logo img {
  height: 28px;
  width: auto;
}

.footer-logo span {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

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

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}

/* ============================================
   Utilities
   ============================================ */

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

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

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