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

:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #818cf8;
  --accent: #06b6d4;
  --bg: #f8fafc;
  --bg-dark: #0f172a;
  --bg-card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #f1f5f9;
  --border: #e2e8f0;
  --success: #22c55e;
  --error: #ef4444;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --transition: 0.3s ease;
}

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

body {
  font-family:
    'Inter',
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER / NAV ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

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

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.logo svg {
  width: 36px;
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-light);
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
}

.btn-ghost:hover {
  background: var(--border);
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.4);
}

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

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

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
  border-radius: 10px;
}

.btn-block {
  width: 100%;
}

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  padding: 4px;
}

.burger span {
  width: 24px;
  height: 2.5px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #eef2ff 0%, #e0f2fe 50%, #f0fdf4 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(79, 70, 229, 0.08) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--bg-dark);
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-light);
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
}

.hero-stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--bg-dark);
}

.hero-stat span {
  font-size: 0.875rem;
  color: var(--text-light);
}

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

.hero-image-wrapper {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-wrapper img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.hero-float-card {
  position: absolute;
  background: white;
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: floatCard 3s ease-in-out infinite;
}

.hero-float-card.card-1 {
  bottom: -20px;
  left: -20px;
}

.hero-float-card.card-2 {
  top: -20px;
  right: -20px;
  animation-delay: 1.5s;
}

.hero-float-card .icon-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.hero-float-card .icon-circle.green {
  background: #dcfce7;
}

.hero-float-card .icon-circle.blue {
  background: #dbeafe;
}

.hero-float-card .card-text strong {
  display: block;
  font-size: 0.9rem;
}

.hero-float-card .card-text span {
  font-size: 0.8rem;
  color: var(--text-light);
}

@keyframes floatCard {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

/* ===== SECTION COMMON ===== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--bg-dark);
}

.section-header p {
  color: var(--text-light);
  font-size: 1.1rem;
}

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-icon.purple {
  background: #ede9fe;
}
.feature-icon.blue {
  background: #dbeafe;
}
.feature-icon.green {
  background: #dcfce7;
}
.feature-icon.orange {
  background: #ffedd5;
}
.feature-icon.pink {
  background: #fce7f3;
}
.feature-icon.cyan {
  background: #cffafe;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ===== CAROUSEL ===== */
.carousel-section {
  background: var(--bg-dark);
  padding: 100px 0;
}

.carousel-section .section-header h2,
.carousel-section .section-header p {
  color: var(--text-white);
}

.carousel-section .section-header p {
  opacity: 0.7;
}

.carousel {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-slide {
  min-width: 100%;
  position: relative;
}

.carousel-slide img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  border-radius: 16px;
}

.carousel-slide .slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
  border-radius: 0 0 16px 16px;
  color: #fff;
}

.carousel-slide .slide-overlay h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.carousel-slide .slide-overlay p {
  opacity: 0.85;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}

.carousel-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: var(--transition);
}

.carousel-dot.active {
  background: var(--primary-light);
  width: 28px;
  border-radius: 5px;
}

/* ===== PRICING ===== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

.price-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.price-card.popular {
  border-color: var(--primary);
  transform: scale(1.04);
  box-shadow: var(--shadow-lg);
}

.price-card.popular .price-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 4px 20px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.price-card.popular:hover {
  transform: scale(1.04) translateY(-4px);
}

.price-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.price-card .price-desc {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.price-amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--bg-dark);
  margin-bottom: 4px;
}

.price-amount span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-light);
}

.price-period {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.price-features {
  text-align: left;
  margin-bottom: 32px;
}

.price-features li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.price-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
}

/* ===== REVIEWS ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.review-card:hover {
  box-shadow: var(--shadow);
}

.review-stars {
  color: #f59e0b;
  font-size: 1.1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.review-card blockquote {
  color: var(--text);
  margin-bottom: 24px;
  font-style: italic;
  line-height: 1.7;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.review-author-info strong {
  display: block;
  font-size: 0.95rem;
}

.review-author-info span {
  font-size: 0.825rem;
  color: var(--text-light);
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 80px 0;
  text-align: center;
  color: #fff;
}

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  opacity: 0.85;
  font-size: 1.1rem;
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn {
  background: #fff;
  color: var(--primary);
}

.cta-section .btn:hover {
  background: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  padding: 4px 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ===== AUTH PAGES ===== */
.auth-page {
  min-height: 100vh;
  display: flex;
}

.auth-left {
  flex: 1;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 60px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.auth-left::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  top: -100px;
  right: -100px;
}

.auth-left::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  bottom: -80px;
  left: -80px;
}

.auth-left h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.auth-left p {
  opacity: 0.85;
  text-align: center;
  max-width: 360px;
  position: relative;
  z-index: 1;
}

.auth-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.auth-form-wrapper {
  width: 100%;
  max-width: 420px;
}

.auth-form-wrapper .logo {
  margin-bottom: 32px;
}

.auth-form-wrapper h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.auth-form-wrapper .subtitle {
  color: var(--text-light);
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text);
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  transition: var(--transition);
  font-size: 0.95rem;
}

.form-input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.form-input.error {
  border-color: var(--error);
}

.form-error {
  color: var(--error);
  font-size: 0.8rem;
  margin-top: 4px;
  display: none;
}

.form-error.visible {
  display: block;
}

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  cursor: pointer;
}

.form-check input[type='checkbox'] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
}

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

.form-link:hover {
  color: var(--primary-dark);
}

.form-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
  color: var(--text-light);
  font-size: 0.85rem;
}

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

.social-auth {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.social-btn {
  flex: 1;
  padding: 12px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.social-btn:hover {
  border-color: var(--primary-light);
  background: var(--bg);
}

.auth-footer {
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
}

.auth-footer a {
  color: var(--primary);
  font-weight: 600;
}

/* ===== TOAST NOTIFICATION ===== */
.toast-container {
  position: fixed;
  top: 84px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 14px 24px;
  border-radius: 10px;
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  animation:
    toastIn 0.3s ease,
    toastOut 0.3s ease 2.7s forwards;
  max-width: 360px;
}

.toast.success {
  background: var(--success);
}
.toast.error {
  background: var(--error);
}
.toast.info {
  background: var(--primary);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(60px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(60px);
  }
}

/* ===== LOADER ===== */
.btn .spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: none;
}

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

.btn.loading .btn-text {
  opacity: 0;
}

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

/* ===== MOBILE NAV ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 999;
}

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

.mobile-menu a {
  display: block;
  padding: 12px 0;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.mobile-menu .nav-auth {
  flex-direction: column;
  margin-top: 16px;
}

.mobile-menu .nav-auth .btn {
  width: 100%;
  justify-content: center;
}

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

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

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

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

  .hero-visual {
    max-width: 600px;
    margin: 0 auto;
  }

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

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

@media (max-width: 768px) {
  .nav-links,
  .nav-auth {
    display: none;
  }

  .burger {
    display: flex;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .section {
    padding: 60px 0;
  }

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

  .price-card.popular {
    transform: none;
  }

  .price-card.popular:hover {
    transform: translateY(-4px);
  }

  .carousel-slide img {
    height: 300px;
  }

  .auth-page {
    flex-direction: column;
  }

  .auth-left {
    padding: 40px 24px;
    min-height: 200px;
  }

  .auth-right {
    padding: 32px 24px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}