/* ===================================
   CSS Variables & Theme System
   =================================== */
:root {
  /* Colors - Light Mode */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --border-color: #e2e8f0;
  --border-focus: #6366f1;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --success-bg: #ecfdf5;
  --success-text: #059669;
  --error-bg: #fef2f2;
  --error-text: #dc2626;
  --error-border: #fecaca;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;
    --border-color: #334155;
    --border-focus: #818cf8;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 80px rgba(99, 102, 241, 0.2);
    --success-bg: #064e3b;
    --success-text: #6ee7b7;
    --error-bg: #450a0a;
    --error-text: #fca5a5;
    --error-border: #7f1d1d;
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===================================
   Background Glow Effect
   =================================== */
.background-glow {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ===================================
   Layout
   =================================== */
.container {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 20px;
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--accent-primary);
}

.tagline {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ===================================
   Card
   =================================== */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* ===================================
   Form Elements
   =================================== */
.form-group {
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 500px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

input[type="text"],
input[type="email"],
textarea,
select {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--border-focus);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-tertiary);
}

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

/* Custom Select */
.select-wrapper {
  position: relative;
}

select {
  appearance: none;
  cursor: pointer;
  padding-right: 40px;
}

.select-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-tertiary);
  pointer-events: none;
}

/* ===================================
   Toggle Buttons
   =================================== */
.toggle-group {
  display: flex;
  gap: 12px;
}

.toggle-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.toggle-btn svg {
  width: 18px;
  height: 18px;
}

.toggle-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.toggle-btn.active {
  background: var(--accent-gradient);
  color: white;
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

/* ===================================
   File Upload
   =================================== */
.file-upload {
  position: relative;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
}

.file-upload:hover,
.file-upload.drag-over {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.05);
}

.file-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.upload-content svg {
  width: 40px;
  height: 40px;
  color: var(--text-tertiary);
  margin-bottom: 12px;
}

.upload-content p {
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.browse-link {
  color: var(--accent-primary);
  font-weight: 500;
}

.file-hint {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* Preview List */
.preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.preview-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border-color);
}

.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
}

/* ===================================
   Error Container
   =================================== */
.error-container {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.error-container svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--error-text);
}

.error-container ul {
  list-style: none;
  color: var(--error-text);
  font-size: 0.875rem;
}

.error-container li + li {
  margin-top: 4px;
}

/* ===================================
   Submit Button
   =================================== */
.submit-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 24px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  background: var(--accent-gradient);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-md);
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.submit-btn:active {
  transform: translateY(0);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-loader {
  display: flex;
  align-items: center;
}

.spinner {
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===================================
   Honeypot (Hidden)
   =================================== */
.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

/* ===================================
   Footer
   =================================== */
.footer {
  text-align: center;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.footer p {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.footer a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
}

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

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeIn 0.4s ease-out;
}

/* ===================================
   Success Page Styles
   =================================== */
.success-container {
  text-align: center;
  padding: 60px 20px;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: var(--success-bg);
  color: var(--success-text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  animation: scaleIn 0.5s ease-out;
}

.success-icon svg {
  width: 40px;
  height: 40px;
}

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

.success-container h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.success-container p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-weight: 500;
  color: var(--accent-primary);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.2s ease;
}

.back-link:hover {
  background: var(--bg-secondary);
  box-shadow: var(--shadow-md);
}

.back-link svg {
  width: 18px;
  height: 18px;
}