/* ============================================
   Design System — Domain For Sale Landing Page
   ============================================ */

/* --- Google Font --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- Custom Properties --- */
:root {
  /* Colors */
  --bg-primary: #06060b;
  --bg-secondary: #0d0d15;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-focus: rgba(139, 92, 246, 0.5);

  --text-primary: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.6);
  --text-tertiary: rgba(240, 240, 245, 0.35);

  --accent-start: #8b5cf6;
  --accent-mid: #6366f1;
  --accent-end: #06b6d4;
  --accent-gradient: linear-gradient(135deg, var(--accent-start), var(--accent-mid), var(--accent-end));

  --success: #10b981;
  --error: #ef4444;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.15);
  --shadow-glow-intense: 0 0 100px rgba(139, 92, 246, 0.25);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
}

/* --- Reset & Base --- */
*,
*::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);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- Background Ambient Effects --- */
.bg-ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-ambient::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
  animation: ambientFloat 20s ease-in-out infinite;
}

.bg-ambient::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.06) 0%, transparent 70%);
  animation: ambientFloat 25s ease-in-out infinite reverse;
}

@keyframes ambientFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 30px) scale(0.95); }
}

/* --- Grid Overlay --- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

main {
  position: relative;
  z-index: 1;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) 0;
  background: rgba(6, 6, 11, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(6, 6, 11, 0.85);
  padding: var(--space-sm) 0;
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text-primary);
}

.navbar-logo {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: var(--font-size-sm);
  color: white;
}

.navbar-domain {
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-secondary);
}

.navbar-status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--accent-start);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.navbar-status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-start);
  animation: pulse 2s ease-in-out infinite;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: var(--transition-base);
}

.lang-toggle:hover {
  background: rgba(139, 92, 246, 0.12);
  border-color: rgba(139, 92, 246, 0.3);
  color: var(--text-primary);
  transform: scale(1.05);
}

.lang-toggle:active {
  transform: scale(0.95);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(80px + var(--space-4xl));
  padding-bottom: var(--space-3xl);
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--accent-start);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.6s ease-out;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-start);
  animation: pulse 2s ease-in-out infinite;
}

.hero-domain {
  font-size: var(--font-size-5xl);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-lg);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.6s ease-out 0.1s both;
  position: relative;
}

.hero-domain::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 40px;
  background: var(--accent-gradient);
  filter: blur(40px);
  opacity: 0.3;
  border-radius: 50%;
}

.hero-tagline {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto var(--space-xl);
  font-weight: 400;
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--accent-gradient);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition-base);
  animation: fadeInUp 0.6s ease-out 0.3s both;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: var(--transition-base);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(139, 92, 246, 0.35);
}

.hero-cta:hover::before {
  opacity: 1;
}

.hero-cta svg {
  width: 18px;
  height: 18px;
  transition: var(--transition-fast);
}

.hero-cta:hover svg {
  transform: translateY(3px);
}

/* --- Sections --- */
.section {
  padding: var(--space-3xl) 0;
}

.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--accent-start);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-label-line {
  width: 20px;
  height: 1px;
  background: var(--accent-start);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.section-desc {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-xl);
}

/* --- Glass Card --- */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-card);
  transition: var(--transition-slow);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-glow);
}

/* --- Form --- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

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

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.form-label svg {
  width: 14px;
  height: 14px;
  opacity: 0.5;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: var(--transition-base);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--border-focus);
  background: rgba(139, 92, 246, 0.03);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

/* --- Submit Button --- */
.btn-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-md) var(--space-xl);
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
  margin-top: var(--space-sm);
}

.btn-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: var(--transition-base);
}

.btn-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(139, 92, 246, 0.3);
}

.btn-submit:hover::before {
  opacity: 1;
}

.btn-submit:active {
  transform: translateY(0);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.btn-submit svg {
  width: 18px;
  height: 18px;
}

/* Spinner */
.spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-submit.loading .spinner {
  display: block;
}

.btn-submit.loading .btn-text {
  display: none;
}

.btn-submit.loading .btn-icon {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Form Messages --- */
.form-message {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-top: var(--space-md);
  animation: fadeInUp 0.3s ease-out;
}

.form-message.show {
  display: flex;
}

.form-message.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--success);
}

.form-message.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--error);
}

.form-message svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* --- Divider --- */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-2xl) 0;
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* --- Telegram Section --- */
.telegram-card {
  text-align: center;
}

.telegram-card .qr-wrapper {
  display: inline-flex;
  padding: var(--space-lg);
  background: white;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  position: relative;
}

.telegram-card .qr-wrapper::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-lg) + 2px);
  background: var(--accent-gradient);
  z-index: -1;
}

#qrcode {
  display: flex;
  align-items: center;
  justify-content: center;
}

#qrcode canvas {
  display: none !important;
}

#qrcode img {
  display: block !important;
  width: 160px !important;
  height: 160px !important;
}

.telegram-info {
  margin-bottom: var(--space-lg);
}

.telegram-handle {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

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

.btn-telegram {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: #2AABEE;
  color: white;
  text-decoration: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition-base);
  border: none;
  cursor: pointer;
}

.btn-telegram:hover {
  background: #229ED9;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(42, 171, 238, 0.3);
}

.btn-telegram svg {
  width: 20px;
  height: 20px;
}

/* --- Footer --- */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer-text {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.footer-domain {
  color: var(--text-secondary);
  font-weight: 500;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }

  .hero-domain {
    font-size: var(--font-size-6xl);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 680px;
  }

  .glass-card {
    padding: var(--space-2xl) var(--space-2xl);
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 1.25rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2.5rem;
    --space-4xl: 3.5rem;
  }

  .hero-domain {
    font-size: var(--font-size-3xl);
  }

  .hero-tagline {
    font-size: var(--font-size-base);
  }

  .glass-card {
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
  }

  .navbar-domain {
    display: none;
  }

  #qrcode img,
  #qrcode canvas {
    width: 128px !important;
    height: 128px !important;
  }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* --- Selection --- */
::selection {
  background: rgba(139, 92, 246, 0.3);
  color: white;
}