/* ==========================================================================
   Tushar & Nancy Wedding RSVP — Design Tokens & Core Styles
   ========================================================================== */

:root {
  /* Color Palette - derived from bridal rose, champagne & warm ivory */
  --color-bg: #F8F5F1;
  --color-card-bg: #FFFFFF;
  --color-text-primary: #2D2522;
  --color-text-secondary: #6B615C;
  --color-text-muted: #8F847E;
  
  --color-accent: #9E4D60;
  --color-accent-hover: #883D50;
  --color-accent-light: #FBF4F5;
  --color-accent-border: #DEC2C8;
  
  --color-border: #E5DDD5;
  --color-border-hover: #CFC5BC;
  --color-input-bg: #FFFFFF;
  
  --color-error: #A82835;
  --color-error-bg: #FCF1F2;
  --color-error-border: #F5C6CB;
  
  --color-success-bg: #F3F7F4;
  --color-success-border: #C8DEC9;
  --color-success-text: #2D5A34;

  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Layout & Geometry */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  
  --shadow-subtle: 0 4px 20px rgba(45, 37, 34, 0.06);
  --shadow-hover: 0 6px 24px rgba(45, 37, 34, 0.10);
  
  --transition-fast: 0.18s ease;
}

/* Box sizing reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 16px 12px 32px 12px;
}

/* Page Wrapper - Centers on Desktop */
.page-wrapper {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

/* Main RSVP Container */
.rsvp-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
  width: 100%;
}

/* Hero Wedding Image */
.photo-container {
  width: 100%;
  position: relative;
  background-color: #ECE5DE;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.wedding-hero-image {
  width: 100%;
  height: auto;
  max-height: 540px;
  object-fit: cover;
  object-position: center top;
  display: block;
}

/* Content Container */
.content-container {
  padding: 28px 24px 32px 24px;
}

@media (min-width: 480px) {
  .content-container {
    padding: 36px 32px 40px 32px;
  }
}

/* Header Hierarchy */
.rsvp-header {
  text-align: center;
  margin-bottom: 28px;
}

.couple-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.invite-subtitle {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* Alert / Error Banners */
.alert-banner {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  line-height: 1.4;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.alert-error {
  background-color: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error);
}

.retry-link {
  background: none;
  border: none;
  color: var(--color-error);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 4px;
}

.retry-link:hover {
  opacity: 0.8;
}

/* Form Layout */
.rsvp-form {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.field-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.01em;
}

/* Inputs */
.text-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text-primary);
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

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

.text-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(158, 77, 96, 0.15);
}

.text-input.input-invalid {
  border-color: var(--color-error);
  background-color: #FFF9FA;
}

/* Field Inline Errors - No Overlapping */
.field-error {
  font-size: 0.82rem;
  color: var(--color-error);
  min-height: 18px;
  line-height: 1.3;
}

/* Choice Buttons (Attendance) */
.button-choice-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 400px) {
  .button-choice-group {
    grid-template-columns: 1fr 1fr;
  }
}

.choice-btn {
  height: 48px;
  padding: 0 14px;
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  outline: none;
  user-select: none;
}

.choice-btn:hover {
  border-color: var(--color-accent-border);
  background-color: var(--color-accent-light);
}

.choice-btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(158, 77, 96, 0.25);
}

.choice-btn.selected {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(158, 77, 96, 0.25);
}

/* Counter Component for Guest Count - Centered */
.count-group {
  transition: opacity 0.25s ease, max-height 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 100%;
}

.count-group .field-label {
  text-align: center;
  width: 100%;
}

.count-group .field-error {
  text-align: center;
  width: 100%;
}

.count-group.is-hidden {
  display: none !important;
}

.counter-container {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 220px;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #FFFFFF;
  overflow: hidden;
  margin: 0 auto;
}

.counter-btn {
  width: 52px;
  height: 100%;
  background: none;
  border: none;
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
  user-select: none;
}

.counter-btn:hover:not(:disabled) {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

.counter-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.counter-btn:focus-visible {
  outline: 2px solid var(--color-accent);
}

.count-input {
  flex: 1;
  height: 100%;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  color: var(--color-text-primary);
  outline: none;
  -moz-appearance: textfield;
}

.count-input::-webkit-outer-spin-button,
.count-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Form Actions / Submit Button */
.form-actions {
  margin-top: 10px;
}

.submit-btn {
  width: 100%;
  height: 50px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 12px rgba(158, 77, 96, 0.20);
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.submit-btn:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  box-shadow: 0 6px 16px rgba(158, 77, 96, 0.28);
}

.submit-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.submit-btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(158, 77, 96, 0.35);
}

.submit-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

/* Spinner inside button */
.btn-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #FFFFFF;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

.submit-btn.is-submitting .btn-spinner,
.btn-spinner:not([hidden]) {
  display: inline-block;
}

.btn-spinner[hidden] {
  display: none !important;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Success Card View */
.success-card {
  text-align: center;
  padding: 36px 16px 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.success-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  color: var(--color-success-text);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.success-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.success-message {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  max-width: 380px;
  line-height: 1.45;
}

/* Footer & Creator Attribution */
.rsvp-footer {
  margin-top: 24px;
  text-align: center;
  padding: 8px 16px 12px 16px;
}

.credit-text {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  letter-spacing: 0.025em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  line-height: 1.4;
  font-weight: 400;
}

.credit-heart {
  color: var(--color-accent);
  display: inline-block;
  font-size: 0.875rem;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.rsvp-footer:hover .credit-heart {
  transform: scale(1.18);
}

.credit-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.credit-link:hover,
.credit-link:focus-visible {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}