/* ==========================================================================
   Kei3N Apps - Design System & Modern CSS (2024-2026 Edition)
   Color Scheme derived from official Kei3N Apps Logo
   Primary Navy: #0D1B36 | Primary Gold: #C49A45 | Accent Gold: #E5B869
   ========================================================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@300;400;500;600;700&display=swap');

:root {
  /* Brand Color Tokens */
  --primary-navy: #0D1B36;
  --navy-light: #1A2E56;
  --navy-dark: #081124;
  --primary-gold: #C49A45;
  --gold-light: #E5B869;
  --gold-dark: #9A7228;
  --gold-glow: rgba(196, 154, 69, 0.25);
  
  /* Light Theme Default Colors */
  --bg-primary: #FAF8F5;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F3EFEA;
  --text-primary: #0D1B36;
  --text-secondary: #4A5568;
  --text-muted: #718096;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(196, 154, 69, 0.2);
  --card-shadow: 0 10px 30px -10px rgba(13, 27, 54, 0.08);
  --navbar-bg: rgba(250, 248, 245, 0.85);
  --badge-bg: rgba(196, 154, 69, 0.12);
  --badge-text: #9A7228;

  /* Universal Single Typography System */
  --font-main: "Quicksand", Arial, Helvetica, sans-serif;
  --font-heading: var(--font-main);
  --font-body: var(--font-main);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1280px;
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-primary: #0A1224;
  --bg-secondary: #0F1B33;
  --bg-tertiary: #142442;
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --card-bg: rgba(15, 27, 51, 0.7);
  --card-border: rgba(196, 154, 69, 0.25);
  --card-shadow: 0 12px 35px -10px rgba(0, 0, 0, 0.5);
  --navbar-bg: rgba(10, 18, 36, 0.85);
  --badge-bg: rgba(229, 184, 105, 0.15);
  --badge-text: #E5B869;
}

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

button, input, select, textarea, a, .btn {
  font-family: inherit;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Utility Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

.text-gold {
  color: var(--primary-gold);
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-gold) 0%, var(--gold-light) 50%, var(--primary-navy) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .text-gradient {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--gold-light) 60%, var(--primary-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-gold) 0%, var(--gold-dark) 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 15px var(--gold-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(196, 154, 69, 0.4);
  background: linear-gradient(135deg, var(--gold-light) 0%, var(--primary-gold) 100%);
}

.btn:disabled,
.btn[disabled],
.btn.submitting {
  opacity: 0.55 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
  box-shadow: none !important;
  transform: none !important;
}

.contact-form.submitting {
  opacity: 0.75;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

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

.btn-secondary:hover {
  border-color: var(--primary-gold);
  color: var(--primary-gold);
  background: var(--badge-bg);
  transform: translateY(-2px);
}

.btn-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  background-color: var(--badge-bg);
  color: var(--badge-text);
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--card-border);
}

/* Modern Header & Glass Navbar */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--navbar-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
  transition: all var(--transition-fast);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}

.logo-img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  background: transparent;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .logo-img {
  transform: scale(1.06);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-name span {
  color: var(--primary-gold);
}

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

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-size: 0.95rem;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle-btn {
  background: var(--badge-bg);
  border: 1.5px solid var(--primary-gold);
  color: var(--primary-gold);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--primary-gold);
  color: #ffffff;
  border-color: var(--primary-gold);
  transform: rotate(15deg);
  box-shadow: 0 4px 16px var(--gold-glow);
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.75rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 95px 0 50px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 80% 20%, var(--gold-glow) 0%, transparent 40%),
              radial-gradient(circle at 10% 70%, rgba(13, 27, 54, 0.05) 0%, transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.hero-title {
  margin-top: 0.5rem;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--card-border);
  width: 100%;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-gold);
  font-family: var(--font-heading);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Visual App Stage Frame */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.visual-stage {
  width: 100%;
  max-width: 440px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(12px);
  position: relative;
  animation: floatStage 6s ease-in-out infinite;
}

@keyframes floatStage {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.app-preview-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.preview-header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-icon-lg {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  object-fit: contain;
  background: transparent;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.preview-info h4 {
  font-size: 1.1rem;
}

.preview-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.app-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

/* Section Common */
.section {
  padding: 35px 0 65px 0;
  position: relative;
  scroll-margin-top: 80px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.section-subtitle {
  color: var(--primary-gold);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
}

/* App Category Filter Tabs */
.filter-tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary-gold);
  color: #FFFFFF;
  border-color: var(--primary-gold);
  box-shadow: 0 4px 15px var(--gold-glow);
}

/* App Portfolio Showcase Grid */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.app-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.app-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-gold);
  box-shadow: 0 15px 35px var(--gold-glow);
}

.app-card-top {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
}

.app-icon, .app-icon-img {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  flex-shrink: 0;
  border: 1px solid var(--card-border);
  box-shadow: 0 6px 16px rgba(0,0,0,0.1);
  object-fit: cover;
  transition: transform var(--transition-fast);
}

.app-card:hover .app-icon-img {
  transform: scale(1.06);
}

.app-details {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.app-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.app-category {
  font-size: 0.85rem;
  color: var(--primary-gold);
  font-weight: 600;
}

.app-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.app-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.app-features li {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-features li::before {
  content: "✓";
  color: var(--primary-gold);
  font-weight: bold;
}

.app-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--card-border);
}

.store-badge-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--primary-navy);
  color: #FFFFFF;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.store-badge-link:hover {
  background: var(--primary-gold);
  color: #FFFFFF;
}

/* Official Google Play Brand Marketing Hub Badge */
.google-play-official-badge {
  display: inline-block;
  text-decoration: none;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.google-play-official-badge img {
  height: 56px;
  width: auto;
  display: block;
  object-fit: contain;
  margin: -6px 0;
}

.google-play-official-badge:hover {
  transform: translateY(-2px);
  filter: brightness(1.12);
}

/* Services Grid - 3 cards per row */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  transition: all var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-gold);
}

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--badge-bg);
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.service-title {
  font-size: 1.3rem;
}

.service-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Contact Form & Map Section */
.contact-wrapper {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--card-shadow);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--badge-bg);
  color: var(--primary-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--primary-gold);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

.phone-picker-wrapper {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  position: relative;
  width: 100%;
}

.country-picker {
  position: relative;
  flex-shrink: 0;
}

.selected-country-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.selected-country-btn:hover,
.selected-country-btn:focus {
  border-color: var(--primary-gold);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

.flag-icon-img {
  width: 22px;
  height: 15px;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  flex-shrink: 0;
}

.selected-dial-code {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.arrow-icon {
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.country-picker.open .arrow-icon {
  transform: rotate(180deg);
}

.country-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: 320px;
  max-width: 88vw;
  background: var(--bg-secondary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.25);
  z-index: 999;
  padding: 0.6rem;
}

.country-picker.open .country-dropdown-menu {
  display: block;
}

.search-country-box {
  margin-bottom: 0.5rem;
}

.country-search-input {
  padding: 0.5rem 0.8rem;
  font-size: 0.88rem;
}

.country-list {
  list-style: none;
  max-height: 240px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.country-list-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text-primary);
  transition: background var(--transition-fast);
}

.country-list-item:hover,
.country-list-item.selected {
  background: var(--bg-tertiary);
  color: var(--primary-gold);
  font-weight: 600;
}

.country-name-text {
  flex-grow: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.country-dial-text {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.82rem;
}

.country-list-item:hover .country-dial-text,
.country-list-item.selected .country-dial-text {
  color: var(--primary-gold);
}

.phone-input {
  flex-grow: 1;
}

/* Form Feedback & Bold User Name Styling */
.form-feedback.success {
  background-color: rgba(34, 197, 94, 0.12);
  color: #15803d;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.user-name-bold {
  color: #000000;
  font-weight: 700;
}

[data-theme="dark"] .user-name-bold {
  color: #FFFFFF;
  font-weight: 700;
}

/* Location Map Container */
.map-container {
  margin-top: 3rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--card-border);
  box-shadow: var(--card-shadow);
  background: var(--card-bg);
}

.map-container iframe {
  display: block;
  width: 100%;
  height: 380px;
  border: 0;
}

/* Footer */
.site-footer {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--card-border);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.75rem;
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 2rem;
  border-top: 1px solid var(--card-border);
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

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

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

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--card-border);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
  }

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

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

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

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

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