/* ==========================================================
   Design System — Daurah Masjid Ar Rahman
   Muslim Solo · Surakarta
   ========================================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Noto+Naskh+Arabic:wght@400;500;600;700&display=swap');

/* ----------------------------------------------------------
   CSS Variables
   ---------------------------------------------------------- */
:root {
  /* Colors */
  --color-primary:       #123B2A;
  --color-primary-dark:  #0B281C;
  --color-primary-light: #1a5240;
  --color-bg:            #F7F8F5;
  --color-surface:       #FFFFFF;
  --color-text:          #1F2933;
  --color-muted:         #6B7280;
  --color-border:        #E5E7EB;
  --color-success:       #237A4B;
  --color-success-bg:    #ECFDF5;
  --color-error:         #DC2626;
  --color-error-bg:      #FEF2F2;
  --color-whatsapp:      #25D366;
  --color-whatsapp-dark: #1EB354;

  /* Gold accent */
  --color-gold:          #C9A84C;
  --color-gold-light:    #F5E6C4;

  /* Spacing */
  --space-1:   4px;
  --space-2:   8px;
  --space-3:   12px;
  --space-4:   16px;
  --space-5:   20px;
  --space-6:   24px;
  --space-8:   32px;
  --space-10:  40px;
  --space-12:  48px;

  /* Border radius */
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-xs:  0 1px 3px rgba(0,0,0,0.06);
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.12);

  /* Typography */
  --font-main:    'Plus Jakarta Sans', system-ui, sans-serif;
  --font-arabic:  'Noto Naskh Arabic', serif;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ----------------------------------------------------------
   Page Container & Transitions
   ---------------------------------------------------------- */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page.hidden {
  display: none;
}

.page.slide-in {
  animation: slideIn 0.35s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ----------------------------------------------------------
   Hero Section
   ---------------------------------------------------------- */
.hero {
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: var(--space-8) var(--space-5);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(201,168,76,0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(201,168,76,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.hero-logo {
  height: 52px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.3));
}

.hero-logo-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.3);
}

.hero-label {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--color-primary);
  background: #FFFFFF;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.hero-title {
  font-size: clamp(22px, 5vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-title em {
  font-style: normal;
  color: var(--color-gold);
}

.hero-arabic {
  font-family: var(--font-arabic);
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-5);
  display: block;
}

.hero-ustadz {
  font-size: 16px;
  font-weight: 600;
  color: rgba(255,255,255,0.95);
  margin-bottom: var(--space-3);
}

.hero-ustadz-prefix {
  font-size: 13px;
  font-weight: 400;
  color: rgba(255,255,255,0.6);
  display: block;
  margin-bottom: 2px;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: 14px;
  color: rgba(255,255,255,0.85);
}

.hero-meta-item--location {
  flex-direction: column;
  gap: var(--space-1);
}

.hero-meta-location-text {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.hero-meta-icon {
  font-size: 15px;
  flex-shrink: 0;
  margin-top: 2px;
  align-self: flex-start;
}

/* Google Maps link in hero */
.hero-maps-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 12px;
  color: var(--color-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
  margin-top: 3px;
  transition: opacity var(--transition-fast);
}

.hero-maps-link:hover {
  opacity: 0.8;
}

/* ----------------------------------------------------------
   Main Container
   ---------------------------------------------------------- */
.container {
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5) var(--space-10);
  flex: 1;
}

/* ----------------------------------------------------------
   Progress Indicator
   ---------------------------------------------------------- */
.progress-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: var(--space-6) 0 var(--space-5);
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.progress-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2.5px solid var(--color-border);
  background: var(--color-surface);
  transition: all var(--transition-normal);
  position: relative;
}

.progress-step.active .progress-dot {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(18, 59, 42, 0.15);
}

.progress-step.done .progress-dot {
  background: var(--color-success);
  border-color: var(--color-success);
}

.progress-step.done .progress-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M2.5 6.5L4.5 8.5L9.5 3.5' stroke='white' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/10px no-repeat;
}

.progress-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-muted);
  white-space: nowrap;
}

.progress-step.active .progress-label {
  color: var(--color-primary);
  font-weight: 600;
}

.progress-step.done .progress-label {
  color: var(--color-success);
  font-weight: 600;
}

.progress-line {
  flex: 1;
  height: 2px;
  background: var(--color-border);
  max-width: 80px;
  margin: 0 var(--space-2);
  margin-bottom: 16px;
  transition: background var(--transition-normal);
}

.progress-line.done {
  background: var(--color-success);
}

/* ----------------------------------------------------------
   Info Card
   ---------------------------------------------------------- */
.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-xs);
}

.info-card p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-3);
  text-align: justify;
}

.info-card p:last-child {
  margin-bottom: 0;
}

.info-card strong {
  color: var(--color-primary);
}

/* ----------------------------------------------------------
   Form Section
   ---------------------------------------------------------- */
.form-section-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-section-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 18px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* ----------------------------------------------------------
   Form Fields
   ---------------------------------------------------------- */
form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label:not(.radio-label):not(.checkbox-label) {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.required {
  color: var(--color-error);
  margin-left: 2px;
}

input[type="text"],
input[type="tel"],
input[type="number"] {
  width: 100%;
  height: 50px;
  padding: 0 var(--space-4);
  font-family: var(--font-main);
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

input[type="text"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(18, 59, 42, 0.1);
}

input[type="text"]::placeholder,
input[type="tel"]::placeholder,
input[type="number"]::placeholder {
  color: #B0B8C4;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  appearance: none;
}

/* Error State */
.form-group.has-error input[type="text"],
.form-group.has-error input[type="tel"],
.form-group.has-error input[type="number"] {
  border-color: var(--color-error);
  background: var(--color-error-bg);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.error-text {
  display: block;
  font-size: 13px;
  color: var(--color-error);
  margin-top: var(--space-2);
  font-weight: 500;
  min-height: 0;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.form-group.has-error .error-text {
  opacity: 1;
  transform: translateY(0);
}

/* ----------------------------------------------------------
   Radio Buttons
   ---------------------------------------------------------- */
.radio-group {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  flex: 1;
  min-width: 130px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

.radio-label:hover {
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.radio-label input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.radio-label input[type="radio"]:checked + .radio-custom {
  border-color: var(--color-primary);
  background: var(--color-primary);
  box-shadow: inset 0 0 0 4px var(--color-surface);
}

.radio-label input[type="radio"]:checked ~ span:last-child,
.radio-label:has(input:checked) {
  color: var(--color-primary);
}

.radio-label:has(input:checked) {
  border-color: var(--color-primary);
  background: rgba(18, 59, 42, 0.04);
}

.form-group.has-error .radio-label {
  border-color: var(--color-error);
}

/* ----------------------------------------------------------
   Checkbox
   ---------------------------------------------------------- */
.checkbox-group {
  background: rgba(18, 59, 42, 0.04);
  border: 1.5px solid rgba(18, 59, 42, 0.15);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkbox-custom {
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
  transition: all var(--transition-fast);
}

.checkbox-label input:checked + .checkbox-custom {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-label input:checked + .checkbox-custom::after {
  content: '';
  width: 12px;
  height: 12px;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M2 6.5L4.5 9L10 3' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
}

.checkbox-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
}

.form-group.has-error .checkbox-custom {
  border-color: var(--color-error);
}

/* ----------------------------------------------------------
   Primary CTA Button
   ---------------------------------------------------------- */
.btn-primary {
  width: 100%;
  height: 52px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  box-shadow: 0 4px 14px rgba(18, 59, 42, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(18, 59, 42, 0.4);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 8px rgba(18, 59, 42, 0.3);
}

.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ----------------------------------------------------------
   Loading Spinner
   ---------------------------------------------------------- */
.btn-loading {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.btn-loading.hidden,
.btn-text.hidden {
  display: none;
}

.spinner {
  width: 18px;
  height: 18px;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

.spinner circle {
  stroke-dasharray: 50;
  stroke-dashoffset: 50;
  animation: dash 1.5s ease-in-out infinite;
}

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

@keyframes dash {
  0%   { stroke-dashoffset: 50; }
  50%  { stroke-dashoffset: 12; }
  100% { stroke-dashoffset: 50; }
}

/* ----------------------------------------------------------
   Success Card
   ---------------------------------------------------------- */
.success-card {
  background: var(--color-surface);
  border: 1px solid rgba(35, 122, 75, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-5);
  position: relative;
  overflow: hidden;
}

.success-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
}

.success-icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-success) 0%, var(--color-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  box-shadow: 0 8px 24px rgba(35, 122, 75, 0.35);
  animation: bounceIn 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes bounceIn {
  0%   { transform: scale(0.5); opacity: 0; }
  70%  { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

.success-icon {
  font-size: 36px;
  line-height: 1;
}

/* White checkmark variant */
.success-icon--white {
  color: #FFFFFF;
  font-size: 36px;
  line-height: 1;
  text-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.success-card h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.success-card p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: var(--space-5);
}

.reg-id-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-8);
}

.reg-id-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.reg-id-value {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

/* ----------------------------------------------------------
   Donation Card
   ---------------------------------------------------------- */
.donation-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-5);
}

.donation-icon {
  font-size: 36px;
  margin-bottom: var(--space-4);
}

.donation-card h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.donation-card p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}

.donation-note {
  display: inline-block;
  font-size: 13px !important;
  font-weight: 600 !important;
  color: var(--color-success) !important;
  background: var(--color-success-bg);
  border: 1px solid rgba(35, 122, 75, 0.2);
  border-radius: var(--radius-lg);
  padding: 8px 16px;
  line-height: 1.4;
  margin-bottom: var(--space-6) !important;
}

/* QRIS */
.qris-container {
  margin: 0 auto var(--space-6);
  max-width: 240px;
  padding: var(--space-3);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.qris-image {
  width: 100%;
  border-radius: var(--radius-sm);
}

/* Rekening Card */
.rekening-card {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}

.rekening-bank {
  font-size: 16px;
  font-weight: 700;
  color: #000000;
  margin-bottom: var(--space-2);
}

.rekening-number {
  font-size: 26px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.rekening-name {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.btn-copy {
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
  height: 44px;
  background: transparent;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}

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

.btn-copy:active {
  transform: scale(0.97);
}

.btn-copy.copied {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}

/* Download QRIS Button */
.btn-download-qris {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  max-width: 280px;
  margin: 0 auto var(--space-5);
  height: 44px;
  background: #1a365d;
  border: none;
  color: #ffffff;
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-download-qris:hover {
  background: #11233f;
  color: #ffffff;
}

.btn-download-qris:active {
  transform: scale(0.97);
}

/* ----------------------------------------------------------
   WhatsApp Section
   ---------------------------------------------------------- */
.whatsapp-section {
  text-align: center;
  margin-bottom: var(--space-6);
}

.whatsapp-section p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.btn-whatsapp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  height: 54px;
  background: linear-gradient(135deg, #25D366 0%, #1EB354 100%);
  color: #fff;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  text-decoration: none;
}

.btn-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(37, 211, 102, 0.5);
}

.btn-whatsapp:active {
  transform: translateY(0) scale(0.98);
}

.btn-whatsapp svg {
  flex-shrink: 0;
}

/* ----------------------------------------------------------
   Footer
   ---------------------------------------------------------- */
footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: var(--space-5) var(--space-4);
  font-size: 13px;
  line-height: 1.8;
}

footer p {
  margin: 0;
}

footer strong {
  color: rgba(255,255,255,0.8);
}

/* ----------------------------------------------------------
   Alert (global error)
   ---------------------------------------------------------- */
.alert-error {
  display: none;
  background: var(--color-error-bg);
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-4);
  font-size: 14px;
  color: var(--color-error);
  font-weight: 500;
  line-height: 1.5;
}

.alert-error.visible {
  display: block;
}

/* ----------------------------------------------------------
   Responsive — Mobile First
   ---------------------------------------------------------- */

/* Tablet: 640px+ */
@media (min-width: 640px) {
  .hero {
    padding: var(--space-12) var(--space-8);
  }

  .hero-title {
    font-size: 30px;
  }

  .container {
    padding: var(--space-8) var(--space-6) var(--space-12);
  }

  .radio-group {
    flex-wrap: nowrap;
  }

  .qris-container {
    max-width: 280px;
  }
}

/* Desktop: 1024px+ */
@media (min-width: 1024px) {
  .hero-title {
    font-size: 34px;
  }

  .hero-meta {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-8);
  }
}

/* Very small screens */
@media (max-width: 380px) {
  .hero {
    padding: var(--space-6) var(--space-4);
  }

  form {
    padding: var(--space-4);
  }

  .radio-group {
    flex-direction: column;
  }

  .radio-label {
    min-width: unset;
  }
}

/* ----------------------------------------------------------
   Focus visible (accessibility)
   ---------------------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ----------------------------------------------------------
   Print (hide irrelevant parts)
   ---------------------------------------------------------- */
@media print {
  .btn-primary,
  .btn-whatsapp,
  .btn-copy,
  footer { display: none; }
}