@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Open+Sans:wght@400;500;600&display=swap');

:root {
  --background: #f8fafc;
  --foreground: #0f172a;
  --card: #ffffff;
  --card-foreground: #0f172a;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-foreground: #ffffff;
  --secondary: #06b6d4;
  --secondary-hover: #0891b2;
  --secondary-foreground: #ffffff;
  --muted: #f1f5f9;
  --muted-foreground: #64748b;
  --accent: #0ea5e9;
  --accent-foreground: #ffffff;
  --destructive: #ef4444;
  --destructive-foreground: #ffffff;
  --border: #e2e8f0;
  --input: #e2e8f0;
  --radius: 0.75rem;

  --gradient-hero: linear-gradient(135deg, #0f2b5c 0%, #134e70 50%, #0c7489 100%);
  --shadow-card: 0 4px 20px -4px rgba(15, 23, 42, 0.08);
  --shadow-card-hover: 0 12px 40px -8px rgba(15, 23, 42, 0.16);
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.3);
}

.dark {
  --background: #0f172a;
  --foreground: #f8fafc;
  --card: #1e293b;
  --card-foreground: #f8fafc;
  --primary: #06b6d4;
  --primary-hover: #0891b2;
  --primary-foreground: #0f172a;
  --secondary: #1e3a8a;
  --secondary-hover: #1d4ed8;
  --secondary-foreground: #f8fafc;
  --muted: #334155;
  --muted-foreground: #94a3b8;
  --border: #334155;
  --input: #334155;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--gradient-hero);
  color: #fff;
  transition: all 0.3s ease;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  font-family: 'Montserrat', sans-serif;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: #ffffff;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--gradient-hero);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-sm {
  padding: 0.4rem 0.875rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
}

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

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

.btn-secondary {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

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

.btn-outline {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
  color: #ffffff;
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.btn-destructive {
  background-color: var(--destructive);
  color: var(--destructive-foreground);
}

.btn-destructive:hover {
  opacity: 0.9;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  color: #fff;
  overflow: hidden;
  padding-top: 5rem;
}

.hero-glow-1 {
  position: absolute;
  top: 5rem;
  left: 2.5rem;
  width: 16rem;
  height: 16rem;
  background: var(--secondary);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.2;
}

.hero-glow-2 {
  position: absolute;
  bottom: 5rem;
  right: 2.5rem;
  width: 24rem;
  height: 24rem;
  background: #ffffff;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.1;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 48rem;
  margin: 0 auto;
  text-align: center;
  padding: 4rem 0;
}

.badge-frost {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero-title span {
  color: var(--secondary);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
}

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

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  line-height: 0;
}

.hero-wave svg {
  width: 100%;
  height: auto;
}

/* Section Common */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--muted-foreground);
  max-width: 40rem;
  margin: 0 auto;
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .hero-title {
    font-size: 3.5rem;
  }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat-card {
  text-align: center;
}

.stat-number {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.feature-box {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 1rem;
}

.feature-box:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 0.5rem;
  background: rgba(29, 78, 216, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Cards Grid */
.cards-grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.cards-grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .cards-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .cards-grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(29, 78, 216, 0.3);
}

.card-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 0.75rem;
  background: rgba(29, 78, 216, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.card:hover .card-icon {
  background: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.card-text {
  color: var(--muted-foreground);
  font-size: 0.9rem;
}

/* Tabs & Forms */
.form-container {
  max-width: 48rem;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-card-hover);
}

.tabs-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--muted);
  padding: 0.25rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
}

.tab-btn {
  padding: 0.625rem;
  border: none;
  background: none;
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  border-radius: calc(var(--radius) - 0.25rem);
  cursor: pointer;
  color: var(--muted-foreground);
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: var(--card);
  color: var(--foreground);
  box-shadow: var(--shadow-card);
}

.tab-content {
  display: none;
}

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

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.375rem;
}

.input-icon-wrapper {
  position: relative;
}

.input-icon-wrapper i, .input-icon-wrapper svg {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted-foreground);
  width: 1.125rem;
  height: 1.125rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--input);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--foreground);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s ease;
}

.input-icon-wrapper .form-input, .input-icon-wrapper .form-select {
  padding-left: 2.5rem;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
}

/* Toast alert */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 1rem 1.5rem;
  background: var(--card);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card-hover);
  color: var(--foreground);
  font-size: 0.9rem;
  animation: slideIn 0.3s ease;
}

.toast-error {
  border-left-color: var(--destructive);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Footer */
.footer {
  background: #0f172a;
  color: #ffffff;
  padding: 4rem 0 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}

.footer-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.625rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

/* Table / Dashboard */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.table th, .table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
}

.table th {
  background: var(--muted);
  font-weight: 600;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-person {
  background: #dbeafe;
  color: #1e40af;
}

.badge-company {
  background: #fef3c7;
  color: #92400e;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--card);
  border-radius: var(--radius);
  max-width: 32rem;
  width: 90%;
  padding: 1.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--muted-foreground);
}