/* ======================== NEOMORPHISM THEME ======================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --neo-light: inset -2px -2px 6px rgba(255, 255, 255, 0.8), inset 2px 2px 6px rgba(0, 0, 0, 0.08);
  --neo-dark: -4px -4px 12px rgba(255, 255, 255, 0.5), 4px 4px 12px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #eef2f5 100%);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ======================== HEADER & NAVIGATION ======================== */
header {
  background: var(--surface);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.logo img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
  cursor: pointer;
}

.nav-links a:hover {
  color: var(--primary);
  background: var(--neo-light);
}

.nav-links a.active {
  color: var(--primary);
  box-shadow: var(--neo-dark);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 6px;
}

.hamburger span {
  width: 24px;
  height: 3px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: 2rem;
    gap: 1rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-links.active {
    max-height: 400px;
  }
}

/* ======================== CONTAINERS ======================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 4rem 2rem;
}

@media (max-width: 768px) {
  .section {
    padding: 3rem 1.5rem;
  }
}

/* ======================== HERO SECTION ======================== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 6rem 2rem;
  text-align: center;
  border-radius: 24px;
  margin: 2rem;
  box-shadow: var(--shadow-lg);
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero {
    padding: 4rem 1.5rem;
  }
}

/* ======================== BUTTONS ======================== */
.btn {
  padding: 1rem 2rem;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: var(--neo-dark);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
  background: var(--surface);
  color: var(--primary);
  border: 2px solid var(--primary);
  box-shadow: var(--neo-dark);
}

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

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid white;
}

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

/* ======================== CARDS ======================== */
.card {
  background: var(--surface);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--neo-dark);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
  font-weight: 700;
}

.card-text {
  color: var(--text-light);
  line-height: 1.8;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

/* ======================== FEATURES SECTION ======================== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.feature {
  text-align: center;
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  box-shadow: var(--neo-dark);
}

.feature h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.feature p {
  color: var(--text-light);
  line-height: 1.6;
}

/* ======================== FORMS ======================== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  box-shadow: var(--neo-light);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

/* ======================== FOOTER ======================== */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 4rem 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-section h4 {
  color: var(--primary);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section a {
  color: var(--text-light);
  text-decoration: none;
  display: block;
  padding: 0.5rem 0;
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--primary);
  padding-left: 0.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-light);
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.social-links a {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: var(--neo-dark);
}

.social-links a:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

/* ======================== CONTENT SECTIONS ======================== */
.content-section {
  background: var(--surface);
  border-radius: 16px;
  padding: 3rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
}

.content-section h2 {
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border);
}

.content-section h3 {
  color: var(--primary);
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.content-section p {
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.content-section ul,
.content-section ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
}

.content-section li {
  margin-bottom: 0.75rem;
  line-height: 1.8;
}

/* ======================== TABS ======================== */
.tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  padding: 1rem 1.5rem;
  border: none;
  background: transparent;
  color: var(--text-light);
  cursor: pointer;
  font-weight: 600;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ======================== ALERTS ======================== */
.alert {
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 2rem;
  border-left: 4px solid;
}

.alert-info {
  background: #eff6ff;
  border-left-color: var(--primary);
  color: #0c4a6e;
}

.alert-warning {
  background: #fffbeb;
  border-left-color: #f59e0b;
  color: #78350f;
}

.alert-success {
  background: #f0fdf4;
  border-left-color: #10b981;
  color: #065f46;
}

/* ======================== RESPONSIVE ======================== */
@media (max-width: 1024px) {
  .container {
    padding: 0 1.5rem;
  }

  nav {
    padding: 1rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .content-section {
    padding: 1.5rem;
  }

  .tabs {
    gap: 0.5rem;
  }

  .tab-btn {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .nav-links {
    gap: 0.5rem;
  }

  .nav-links a {
    padding: 0.75rem;
  }
}

/* ======================== UTILITY CLASSES ======================== */
.text-center {
  text-align: center;
}

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

.text-light {
  color: var(--text-light);
}

.mt-2 {
  margin-top: 1rem;
}

.mt-4 {
  margin-top: 2rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 2rem;
}

.hidden {
  display: none;
}

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

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}