/* ==========================================
   MODERN DESIGN SYSTEM
   ========================================== */

:root {
  /* Hauptfarben */
  --primary: #14213D; /* Deep Navy */
  --primary-light: #1A274B;
  --primary-dark: #0F1A33;
  --accent: #EFE3D0; /* Warm Sand */
  --accent-alt: #EFE3D0;
  /* Akzent als RGB und weiche Flächen-Variante */
  --accent-rgb: 239, 227, 208;
  --accent-bg-soft: rgba(239, 227, 208, 0.42);
  --success: #4B7F52;
  --warning: #d97706;
  --error: #dc2626;
  
  /* Text */
  --text-primary: #14213D;
  --text-secondary: #6B7280; /* Secondary text */
  --text-muted: #718096;
  
  /* Hintergründe */
  --bg-light: #FAFAFA; /* Background */
  --bg-white: #FFFFFF; /* Card background */
  --bg-cream: #FAFAFA;
  
  /* Border */
  --border-color: #E6E6E6; /* Borders / Dividers */
  --border: #E6E6E6;
  
  /* Schatten - subtiler für eleganten Look */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 24px 34px rgba(0, 0, 0, 0.10);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  
  /* Legacy */
  --muted: #718096;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 24px 16px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: #FAFAFA;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ==========================================
   BOOKING CONTAINER & HEADER
   ========================================== */

.booking-container {
  max-width: 600px;
  margin: 0 auto;
}

.booking-header {
  text-align: center;
  margin-bottom: 40px;
  animation: slideDown 0.5s var(--transition-base);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.restaurant-title {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.booking-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
  font-weight: 400;
}

/* ==========================================
   BOOKING CARD
   ========================================== */

.booking {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
  animation: fadeInUp 0.5s var(--transition-base);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==========================================
   STEPPER NAVIGATION
   ========================================== */

.stepper-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 40px;
  padding: 8px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.step-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 6px;
  min-height: 60px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  border-radius: var(--radius-md);
  position: relative;
}

.step-btn:hover:not(.completed):not(.active) {
  background: var(--accent-bg-soft);
  color: var(--text-primary);
}

.step-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow-md);
  transform: scale(1.05);
}

.step-btn.completed {
  background: var(--accent-bg-soft);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.step-icon {
  display: inline-flex;
  width: 24px;
  height: 24px;
  line-height: 1;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-icon svg,
.step-icon img {
  width: 100%;
  height: 100%;
}

.step-icon svg {
  stroke: #1f2937;
  fill: none;
  stroke-width: 2.5;
}

.step-icon img {
  object-fit: contain;
  filter: brightness(0) saturate(100%);
}

.step-btn.active .step-icon svg {
  stroke: #ffffff;
}

.step-btn.active .step-icon img {
  filter: brightness(0) saturate(100%) invert(1);
}

.step-label {
  display: none;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.step-value {
  display: none;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.step-btn.show-label .step-label {
  display: inline-flex;
}

.step-btn.show-value .step-value {
  display: inline-flex;
}

.step-btn.show-value .step-icon,
.step-btn.show-value .step-label {
  display: none;
}

.step-btn.icon-only .step-label,
.step-btn.icon-only .step-value {
  display: none;
}

/* ==========================================
   STEP CONTENT
   ========================================== */

.step-content {
  display: none;
  animation: fadeInUp 0.4s var(--transition-base);
}

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

.step-content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-primary);
}

.step-description {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 28px;
  font-weight: 400;
}

/* ==========================================
   STEP 1: PERSONS GRID
   ========================================== */

.persons-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.person-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 20px 12px;
  border: 2px solid var(--border-color);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-base);
  text-align: center;
}

.person-count {
  font-size: 24px;
  font-weight: 700;
  display: block;
}

.person-label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.person-btn:hover {
  border-color: var(--primary);
  background: var(--bg-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.person-btn.selected {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.person-btn.selected .person-label {
  color: rgba(255, 255, 255, 0.9);
}

/* ==========================================
   CALENDAR
   ========================================== */

.calendar-wrapper {
  margin: 20px 0;
}

.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 0 4px;
}

.calendar-month-year {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  min-width: 150px;
}

.calendar-nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--transition-base);
}

.calendar-nav-btn:hover {
  background: var(--primary);
  color: white;
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.calendar-nav-btn svg {
  width: 20px;
  height: 20px;
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.weekday {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 0;
}

.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}

.calendar-days div {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  background: var(--bg-white);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-base);
}

.calendar-days div:hover:not(.disabled):not(.past) {
  border-color: var(--accent);
  background: var(--accent-bg-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.calendar-days .selected {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.calendar-days .today {
  border-color: var(--accent);
  background: var(--accent-bg-soft);
  color: var(--primary);
  font-weight: 700;
}

.calendar-days .disabled {
  background: var(--bg-light);
  color: var(--text-muted);
  border-color: transparent;
  cursor: not-allowed;
  opacity: 0.5;
}

.calendar-days .past {
  background: var(--bg-light);
  color: var(--text-muted);
  border-color: transparent;
  cursor: not-allowed;
}

/* ==========================================
   TIMESLOT SECTION
   ========================================== */

.timeslot-info {
  background: var(--accent-bg-soft);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 24px;
}

.timeslot-info p {
  margin: 0;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.times-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
}

.times-grid button {
  padding: 16px 12px;
  border: 2px solid var(--border-color);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-base);
  text-align: center;
}

.times-grid button:hover:not(.disabled) {
  border-color: var(--primary);
  background: var(--bg-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.times-grid button.selected {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.times-grid button.disabled {
  background: var(--bg-light);
  color: var(--text-muted);
  border-color: transparent;
  cursor: not-allowed;
  opacity: 0.5;
}

/* ==========================================
   FORMS
   ========================================== */

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.optional {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--border-color);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-primary);
  transition: all var(--transition-base);
  font-family: inherit;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(20, 33, 61, 0.12);
  background: var(--bg-white);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: inherit;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-md);
}

.btn-large {
  width: 100%;
  padding: 16px 24px;
  font-size: 15px;
  min-height: 50px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.active {
  opacity: 1;
  cursor: pointer;
}

/* ==========================================
   MODAL
   ========================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s var(--transition-base);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    backdrop-filter: blur(0);
  }
  to {
    opacity: 1;
    backdrop-filter: blur(4px);
  }
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 0;
  width: 90%;
  max-width: 480px;
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.3s var(--transition-base);
  text-align: center;
  overflow: hidden;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-header {
  background: var(--primary);
  padding: 24px;
  color: white;
}

.modal-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0;
  color: white;
}

.modal-subtitle {
  font-size: 14px;
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 400;
}

.modal-description {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 20px;
  line-height: 1.6;
  padding: 0 24px;
}

.reservation-summary {
  background: white;
  padding: 24px;
  margin: 0;
  text-align: left;
}

.summary-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 16px;
}

.summary-row:last-child {
  margin-bottom: 0;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.summary-label {
  font-size: 11px;
  font-weight: 600;
  color: #9CA3AF;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.summary-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-content .form-group {
  padding: 0 24px;
  margin-bottom: 24px;
}

.modal-content .btn-large {
  margin: 0 24px 24px;
  width: calc(100% - 48px);
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 640px) {
  body {
    padding: 16px 12px;
  }

  .booking-container {
    max-width: 100%;
  }

  .booking {
    padding: 24px 20px;
  }

  .restaurant-title {
    font-size: 28px;
  }

  .booking-header {
    margin-bottom: 32px;
  }

  .stepper-nav {
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px;
  }

  .step-btn {
    min-width: auto;
    flex: 0 0 calc(50% - 3px);
    padding: 10px 6px;
  }

  .step-label {
    display: none !important;
  }

  .persons-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .step-content h2 {
    font-size: 20px;
  }

  .modal-content {
    width: 95%;
    max-width: 380px;
    padding: 32px 24px;
  }

  .calendar-days {
    gap: 6px;
  }

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

@media (max-width: 480px) {
  body {
    padding: 12px 8px;
  }

  .booking {
    padding: 20px 16px;
  }

  .restaurant-title {
    font-size: 24px;
  }

  .stepper-nav {
    margin-bottom: 32px;
  }

  .step-content h2 {
    font-size: 18px;
  }

  .persons-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .person-btn {
    padding: 16px 10px;
  }

  .person-count {
    font-size: 20px;
  }

  .modal-content {
    padding: 28px 20px;
  }

  .calendar-days {
    gap: 5px;
  }

  .calendar-days div {
    font-size: 12px;
  }

  .weekday {
    font-size: 11px;
  }
}