/* ============================================
   Color Palette
   ============================================ */
:root {
  --primary-accent: #2196F3;
  --secondary-accent: #f2994b;
  --danger: #e74c3c;
  --text-primary: #333;
  --text-secondary: #666;
  --text-light: #999;
  --bg-light: #f5f5f5;
  --bg-white: #fff;
  --border: #e0e0e0;
  --border-light: #eee;

  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-48: 48px;
  --spacing-64: 64px;

  --radius-4: 4px;
  --radius-8: 8px;
  --radius-12: 12px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);

  --transition: all 0.3s ease;
}

/* ============================================
   Reset & Base
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-white);
  line-height: 1.6;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  margin-bottom: var(--spacing-16);
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-16);
}

a {
  color: var(--primary-accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #1976d2;
  text-decoration: underline;
}

code {
  background-color: var(--bg-light);
  padding: 2px 6px;
  border-radius: var(--radius-4);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
}

/* ============================================
   Button Styles
   ============================================ */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-8);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  text-align: center;
  user-select: none;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

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

.btn-primary:hover {
  background-color: #1976d2;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--primary-accent);
  color: white;
  text-decoration: none;
}

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

.btn-danger:hover {
  background-color: #d63823;
  text-decoration: none;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.125rem;
}

/* ============================================
   Forms
   ============================================ */
input, textarea, select {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-8);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
  margin-bottom: var(--spacing-16);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary-accent);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

label {
  display: block;
  margin-bottom: var(--spacing-8);
  font-weight: 500;
  color: var(--text-primary);
}

/* ============================================
   Cards & Containers
   ============================================ */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-24);
}

.card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-8);
  padding: var(--spacing-24);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

/* ============================================
   Navbar
   ============================================ */
.navbar {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-16) var(--spacing-24);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
}

.logo {
  color: var(--primary-accent);
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.logo-mobil { display: none; }

@media (max-width: 768px) {
  .logo-desktop { display: none; }
  .logo-mobil   { display: block; }
  .logo-img { height: 40px; }
}

.navbar-menu {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  right: 0;
  left: auto;
  width: 220px;
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-8);
  box-shadow: var(--shadow-md);
  gap: 0;
  padding: 0 var(--spacing-16);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  z-index: 99;
}

.navbar-menu.active {
  max-height: 500px;
  padding: var(--spacing-8) var(--spacing-16);
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: var(--spacing-8) 0;
  display: block;
  border-bottom: 1px solid var(--border-light);
}

.nav-link:last-child {
  border-bottom: none;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-accent);
}

.nav-auth, .nav-user {
  display: flex;
  gap: var(--spacing-16);
  align-items: center;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: var(--transition);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--text-primary);
  color: white;
  padding: var(--spacing-64) var(--spacing-24);
  margin-top: var(--spacing-64);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-48);
  margin-bottom: var(--spacing-48);
}

.footer-col h4 {
  color: white;
  margin-bottom: var(--spacing-16);
}

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

.footer-col li {
  margin-bottom: var(--spacing-8);
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-col a:hover {
  color: white;
  text-decoration: underline;
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: var(--spacing-24);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-8); }
.mt-2 { margin-top: var(--spacing-16); }
.mt-3 { margin-top: var(--spacing-24); }
.mt-4 { margin-top: var(--spacing-32); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-8); }
.mb-2 { margin-bottom: var(--spacing-16); }
.mb-3 { margin-bottom: var(--spacing-24); }
.mb-4 { margin-bottom: var(--spacing-32); }

.hidden {
  display: none;
}

.error {
  color: var(--danger);
}

.success {
  color: #4caf50;
}

/* ============================================
   Accessibility
   ============================================ */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary-accent);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 200;
}

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

#main {
  outline: none;
}