/*
 * APTISI Lebong - Main Stylesheet
 * Website resmi Asosiasi Perguruan Tinggi Swasta Indonesia
 * Teknologi: HTML5 + CSS3 murni, tanpa framework
 */

:root {
  --primary: #0B57D0;
  --secondary: #14B8A6;
  --accent: #F59E0B;
  --text: #0F172A;
  --surface: #F8FAFC;
  --muted: #E2E8F0;
  --white: #FFFFFF;
  --border: #CBD5E1;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --spacing: 8px;
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  color: var(--text);
  background-color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--secondary);
}

a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: var(--white);
  padding: calc(var(--spacing) * 1) calc(var(--spacing) * 2);
  z-index: 100;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  top: 0;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing) * 2);
}

@media (min-width: 768px) {
  .container {
    padding: 0 calc(var(--spacing) * 3);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 calc(var(--spacing) * 4);
  }
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--text);
  margin-bottom: calc(var(--spacing) * 2);
}

h1 {
  font-size: 2.25rem;
  margin-bottom: calc(var(--spacing) * 3);
}

h2 {
  font-size: 1.875rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: calc(var(--spacing) * 2);
  line-height: 1.75;
}

.btn {
  display: inline-block;
  padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 3);
  border-radius: 6px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  font-size: 1rem;
  line-height: 1.5;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background: #0947b0;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: #0f9d8f;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

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

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: calc(var(--spacing) * 1.5) 0;
  font-size: 0.875rem;
}

.topbar-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: calc(var(--spacing) * 2);
}

.topbar-info {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing) * 3);
  color: #64748B;
}

.topbar-info-item {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 1);
}

.topbar-info-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.topbar-cta {
  display: flex;
  gap: calc(var(--spacing) * 2);
}

.navbar {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(var(--spacing) * 2) 0;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 2);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
}

.navbar-logo img {
  width: 48px;
  height: 48px;
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: calc(var(--spacing) * 1);
}

.navbar-toggle svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 1023px) {
  .navbar-toggle {
    display: block;
  }
}

.navbar-menu {
  display: flex;
  gap: calc(var(--spacing) * 4);
  list-style: none;
}

@media (max-width: 1023px) {
  .navbar-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    gap: 0;
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .navbar-menu.active {
    max-height: 600px;
  }
}

.navbar-item {
  position: relative;
}

.navbar-link {
  display: block;
  padding: calc(var(--spacing) * 1) calc(var(--spacing) * 1.5);
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.navbar-link.active {
  color: var(--primary);
  position: relative;
}

.navbar-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
}

@media (max-width: 1023px) {
  .navbar-link {
    padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
    border-bottom: 1px solid var(--border);
  }

  .navbar-link.active::after {
    display: none;
  }
}

.navbar-dropdown {
  list-style: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--white);
  box-shadow: var(--shadow-lg);
  border-radius: 6px;
  min-width: 220px;
  padding: calc(var(--spacing) * 1) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
}

.navbar-item:hover .navbar-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar-dropdown-link {
  display: block;
  padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 2);
  color: var(--text);
  font-size: 0.9375rem;
  transition: all 0.2s ease;
}

.navbar-dropdown-link:hover {
  background: var(--surface);
  color: var(--primary);
}

@media (max-width: 1023px) {
  .navbar-dropdown {
    position: static;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding-left: calc(var(--spacing) * 2);
    background: var(--surface);
  }
}

.hero {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, #0947b0 100%);
  color: var(--white);
  padding: calc(var(--spacing) * 10) 0 calc(var(--spacing) * 12);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  color: var(--white);
  font-size: 2.5rem;
  margin-bottom: calc(var(--spacing) * 3);
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 3rem;
  }
}

.hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.75;
  margin-bottom: calc(var(--spacing) * 4);
  opacity: 0.95;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.25rem;
  }
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing) * 2);
  justify-content: center;
}

.breadcrumb {
  background: var(--surface);
  padding: calc(var(--spacing) * 2) 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing) * 1);
  list-style: none;
  font-size: 0.875rem;
  color: #64748B;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 1);
}

.breadcrumb-item:not(:last-child)::after {
  content: '/';
  color: var(--border);
}

.breadcrumb-link {
  color: #64748B;
}

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

.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
}

.section {
  padding: calc(var(--spacing) * 8) 0;
}

.section-header {
  text-align: center;
  margin-bottom: calc(var(--spacing) * 6);
}

.section-title {
  font-size: 2rem;
  margin-bottom: calc(var(--spacing) * 2);
}

.section-subtitle {
  font-size: 1.125rem;
  color: #64748B;
  max-width: 700px;
  margin: 0 auto;
}

.grid {
  display: grid;
  gap: calc(var(--spacing) * 3);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--surface);
}

.card-body {
  padding: calc(var(--spacing) * 3);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: calc(var(--spacing) * 1.5);
  color: var(--text);
}

.card-text {
  color: #64748B;
  margin-bottom: calc(var(--spacing) * 2);
  line-height: 1.6;
}

.card-meta {
  display: flex;
  gap: calc(var(--spacing) * 2);
  font-size: 0.875rem;
  color: #94A3B8;
  margin-bottom: calc(var(--spacing) * 2);
}

.card-footer {
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.quick-links {
  background: var(--surface);
  padding: calc(var(--spacing) * 6) 0;
}

.quick-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing) * 3);
}

.quick-link-card {
  background: var(--white);
  border-radius: 8px;
  padding: calc(var(--spacing) * 4);
  text-align: center;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

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

.quick-link-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto calc(var(--spacing) * 2);
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quick-link-icon svg {
  width: 24px;
  height: 24px;
  color: var(--white);
}

.quick-link-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: calc(var(--spacing) * 1);
  color: var(--text);
}

.quick-link-desc {
  font-size: 0.875rem;
  color: #64748B;
}

.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--spacing) * 3);
}

.feature-item {
  display: flex;
  gap: calc(var(--spacing) * 2);
  padding: calc(var(--spacing) * 3);
  background: var(--white);
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

.feature-item:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.feature-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  background: var(--surface);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.feature-content h3 {
  font-size: 1.125rem;
  margin-bottom: calc(var(--spacing) * 1);
}

.feature-content p {
  font-size: 0.9375rem;
  color: #64748B;
  margin: 0;
}

.accordion {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.accordion-item {
  border-bottom: 1px solid var(--border);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  width: 100%;
  background: var(--white);
  border: none;
  padding: calc(var(--spacing) * 2.5) calc(var(--spacing) * 3);
  text-align: left;
  font-size: 1.0625rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s ease;
}

.accordion-header:hover {
  background: var(--surface);
}

.accordion-header.active {
  background: var(--surface);
  color: var(--primary);
}

.accordion-icon {
  transition: transform 0.3s ease;
}

.accordion-header.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.accordion-content.active {
  max-height: 500px;
}

.accordion-body {
  padding: calc(var(--spacing) * 3);
  background: var(--surface);
  color: #64748B;
  line-height: 1.75;
}

.table-container {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

thead {
  background: var(--surface);
}

th {
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 2);
  text-align: left;
  font-weight: 600;
  color: var(--text);
  border-bottom: 2px solid var(--border);
}

td {
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 2);
  border-bottom: 1px solid var(--border);
  color: #64748B;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: var(--surface);
}

.form-group {
  margin-bottom: calc(var(--spacing) * 3);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: calc(var(--spacing) * 1);
  color: var(--text);
}

.form-label-required::after {
  content: ' *';
  color: #EF4444;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11, 87, 208, 0.1);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: #EF4444;
}

.form-error {
  color: #EF4444;
  font-size: 0.875rem;
  margin-top: calc(var(--spacing) * 1);
  display: none;
}

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

.form-help {
  font-size: 0.875rem;
  color: #64748B;
  margin-top: calc(var(--spacing) * 1);
}

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

.form-checkbox-group,
.form-radio-group {
  display: flex;
  align-items: flex-start;
  gap: calc(var(--spacing) * 1.5);
}

.form-checkbox,
.form-radio {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.toast {
  position: fixed;
  bottom: calc(var(--spacing) * 3);
  right: calc(var(--spacing) * 3);
  background: var(--white);
  padding: calc(var(--spacing) * 2.5) calc(var(--spacing) * 3);
  border-radius: 8px;
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--secondary);
  max-width: 400px;
  transform: translateX(500px);
  transition: transform 0.3s ease;
  z-index: 100;
}

.toast.active {
  transform: translateX(0);
}

.toast-success {
  border-left-color: var(--secondary);
}

.toast-error {
  border-left-color: #EF4444;
}

.back-to-top {
  position: fixed;
  bottom: calc(var(--spacing) * 3);
  right: calc(var(--spacing) * 3);
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 40;
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #0947b0;
  transform: translateY(-4px);
}

.footer {
  background: var(--text);
  color: var(--white);
  padding: calc(var(--spacing) * 8) 0 calc(var(--spacing) * 3);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing) * 6);
  margin-bottom: calc(var(--spacing) * 6);
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: calc(var(--spacing) * 2.5);
  font-size: 1.125rem;
}

.footer-section p,
.footer-section li {
  color: #CBD5E1;
  line-height: 1.75;
}

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

.footer-list li {
  margin-bottom: calc(var(--spacing) * 1.5);
}

.footer-list a {
  color: #CBD5E1;
  transition: color 0.2s ease;
}

.footer-list a:hover {
  color: var(--white);
}

.footer-social {
  display: flex;
  gap: calc(var(--spacing) * 2);
  margin-top: calc(var(--spacing) * 2);
}

.footer-social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.footer-social-link:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

.footer-social-link svg {
  width: 20px;
  height: 20px;
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: calc(var(--spacing) * 3);
  text-align: center;
  color: #94A3B8;
  font-size: 0.875rem;
}

.badge {
  display: inline-block;
  padding: calc(var(--spacing) * 0.5) calc(var(--spacing) * 1.5);
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--primary);
  color: var(--white);
}

.badge-secondary {
  background: var(--secondary);
  color: var(--white);
}

.badge-accent {
  background: var(--accent);
  color: var(--white);
}

@media (max-width: 639px) {
  h1 {
    font-size: 1.875rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .section {
    padding: calc(var(--spacing) * 6) 0;
  }
}