/* Root Variables & Themes */
:root {
  /* Light Theme Colors */
  --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(255, 255, 255, 0.4);
  --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.02);
  --text-main: #1e293b;
  --text-muted: #64748b;
  
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.15);
  
  --input-bg: #ffffff;
  --input-border: #cbd5e1;
  --input-focus-border: #6366f1;
  
  --success-color: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --error-color: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  
  --accordion-bg: #f8fafc;
  
  --transition-speed: 0.3s;
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  
  --primary-color: #818cf8;
  --primary-hover: #6366f1;
  --primary-glow: rgba(129, 140, 248, 0.2);
  
  --input-bg: #1e293b;
  --input-border: #475569;
  --input-focus-border: #818cf8;
  
  --success-color: #34d399;
  --success-bg: rgba(52, 211, 153, 0.1);
  --error-color: #f87171;
  --error-bg: rgba(248, 113, 113, 0.1);
  
  --accordion-bg: #1e293b;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-gradient);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  transition: background var(--transition-speed), color var(--transition-speed);
}

/* App Container & Centering */
.app-container {
  width: 100%;
  max-width: 580px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Card Styling - Glassmorphism */
.card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 40px;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  transition: background var(--transition-speed), border var(--transition-speed), box-shadow var(--transition-speed);
}

/* Card Header */
.card-header {
  text-align: center;
  margin-bottom: 32px;
}

.logo-container {
  width: 56px;
  height: 56px;
  background: var(--primary-glow);
  color: var(--primary-color);
  border-radius: 16px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
  transition: transform 0.5s ease;
}

.logo-container:hover {
  transform: rotate(10deg) scale(1.05);
}

.logo-icon {
  width: 28px;
  height: 28px;
}

h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
}

/* Form Layout */
form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Input Groups */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.section-label {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 600;
}

/* Input Styling with Prefix */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: 12px;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
  overflow: hidden;
}

.input-wrapper:focus-within {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

.phone-prefix {
  padding-left: 16px;
  padding-right: 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-right: 1px solid var(--input-border);
  user-select: none;
  display: flex;
  align-items: center;
  height: 50px;
}

.input-wrapper input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  padding: 14px 16px;
  font-size: 16px;
  font-family: inherit;
  color: var(--text-main);
  letter-spacing: 0.05em;
  font-weight: 500;
  height: 50px;
}

.error-msg {
  color: var(--error-color);
  font-size: 13px;
  font-weight: 500;
  display: none;
  animation: fadeIn 0.2s ease-out;
}

/* Reason Choice Cards */
.reasons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.reason-card {
  position: relative;
  cursor: pointer;
  display: block;
}

.reason-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.reason-content {
  border: 1.5px solid var(--input-border);
  background: var(--input-bg);
  border-radius: 14px;
  padding: 16px;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all var(--transition-speed);
}

.reason-card:hover .reason-content {
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.03);
}

.reason-card input[type="radio"]:checked + .reason-content {
  background: var(--primary-glow);
  border-color: var(--primary-color);
  box-shadow: 0 0 0 1px var(--primary-color);
}

.reason-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.reason-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Custom Reason TextArea */
.custom-reason-group {
  margin-top: 14px;
  animation: slideDown 0.3s ease-out;
}

.custom-reason-group textarea {
  width: 100%;
  border: 1.5px solid var(--input-border);
  background: var(--input-bg);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-main);
  outline: none;
  resize: vertical;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.custom-reason-group textarea:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 4px var(--primary-glow);
}

/* KVKK Accordion */
.info-accordion {
  border: 1px solid var(--input-border);
  border-radius: 12px;
  background: var(--accordion-bg);
  overflow: hidden;
  transition: all var(--transition-speed);
}

.accordion-header {
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.accordion-header:hover {
  color: var(--text-main);
}

.chevron-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

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

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

.accordion-content p {
  padding: 0 16px 16px 16px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-muted);
}

/* Buttons */
.submit-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 12px;
  padding: 16px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  transition: background var(--transition-speed), transform 0.1s, box-shadow var(--transition-speed);
  margin-top: 8px;
  box-shadow: 0 4px 12px var(--primary-glow);
  height: 54px;
}

.submit-btn:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 18px var(--primary-glow);
}

.submit-btn:active {
  transform: scale(0.98);
}

.secondary-btn {
  background: transparent;
  color: var(--text-main);
  border: 1.5px solid var(--input-border);
  border-radius: 12px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.secondary-btn:hover {
  background: var(--accordion-bg);
  border-color: var(--text-main);
}

/* Status Screens */
.status-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 10;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px;
  animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.status-icon-wrapper {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 24px;
  animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s both;
}

.success-bg {
  background: var(--success-bg);
  color: var(--success-color);
}

.error-bg {
  background: var(--error-bg);
  color: var(--error-color);
}

.status-icon {
  width: 38px;
  height: 38px;
}

.status-screen h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
}

.status-message {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
  max-width: 360px;
  margin-bottom: 32px;
}

/* Spinner */
.btn-spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

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

/* Theme Toggle Button */
.theme-btn {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-speed);
  z-index: 100;
}

.theme-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.theme-btn svg {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform 0.5s ease, opacity 0.3s ease;
}

/* Toggle icon display values depending on mode */
body:not([data-theme="dark"]) .sun-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}
body:not([data-theme="dark"]) .moon-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

body[data-theme="dark"] .sun-icon {
  opacity: 1;
  transform: rotate(0) scale(1);
}
body[data-theme="dark"] .moon-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

/* Admin Dashboard link style */
.app-footer {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.admin-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-speed);
}

.admin-link:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

/* Helpers */
.hidden {
  display: none !important;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { transform: scale(0.7); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes slideDown {
  from { transform: translateY(-10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive adjustments */
@media (max-width: 600px) {
  body {
    padding: 12px;
  }
  
  .card {
    padding: 24px 20px;
    border-radius: 20px;
  }

  .reasons-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 24px;
  }

  .theme-btn {
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
  }
}