/* ============================================
   ACELERA EXPO FEST - Registration Form Styles
   ============================================ */

/* Design Tokens */
:root {
  /* Colors - Easy to customize */
  --color-bg: #0a0a0f;
  --color-bg-card: #151520;
  --color-bg-input: #1a1a28;
  --color-bg-hover: #202030;

  --color-accent: #ff4d00;
  --color-accent-hover: #ff6b2b;
  --color-accent-glow: rgba(255, 77, 0, 0.3);

  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #606070;

  --color-border: #404055;
  --color-border-focus: var(--color-accent);
  --color-error: #ff4757;
  --color-success: #2ed573;

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px var(--color-accent-glow);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* 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: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg);
  min-height: 100vh;
  padding: var(--space-4);

  /* Subtle racing stripe pattern */
  background-image:
    linear-gradient(135deg, transparent 45%, rgba(255, 77, 0, 0.03) 45%, rgba(255, 77, 0, 0.03) 55%, transparent 55%);
  background-size: 40px 40px;
}

/* Container */
.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Header */
.header {
  text-align: center;
  padding: var(--space-4) 0;
}

.header__logo {
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto var(--space-3);
  display: block;
  border-radius: var(--radius-md);
}

.header__subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-top: 0;
}

/* Form Card */
.form-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

/* Form Section */
.form-section {
  border: none;
  margin-bottom: var(--space-6);
}

.form-section:last-of-type {
  margin-bottom: var(--space-4);
}

.form-section__title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.form-section__icon {
  font-size: var(--font-size-base);
}

/* Form Group */
.form-group {
  margin-bottom: var(--space-4);
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-row {
  display: flex;
  gap: var(--space-4);
}

.form-group--half {
  flex: 1;
}

/* Form Label */
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

/* Form Input */
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-bg-input);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast);
}

/* Conditional field animation */
.form-group--conditional {
  animation: slideDown 0.3s ease-out;
}

.form-group--conditional[hidden] {
  display: none;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.form-input:hover {
  background: var(--color-bg-hover);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.form-input--uppercase {
  text-transform: uppercase;
}

.form-input--error {
  border-color: var(--color-error);
}

.form-input--error:focus {
  box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.3);
}

/* Number input - remove spinners */
.form-input[type="number"]::-webkit-outer-spin-button,
.form-input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.form-input[type="number"] {
  -moz-appearance: textfield;
}

/* Form Error */
.form-error {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  min-height: 1rem;
}

/* Segmented Control */
.segmented-control {
  display: flex;
  background: var(--color-bg-input);
  border-radius: var(--radius-md);
  padding: 4px;
  gap: 4px;
}

.segmented-control__input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-control__label {
  flex: 1;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
  color: var(--color-text-secondary);
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    color var(--transition-fast),
    background var(--transition-fast);
}

.segmented-control__label:hover {
  color: var(--color-text-primary);
}

.segmented-control__input:checked+.segmented-control__label {
  color: var(--color-text-primary);
  background: var(--color-accent);
}

.segmented-control__input:focus-visible+.segmented-control__label {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Form Status */
.form-status {
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.form-status--error {
  color: var(--color-error);
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid rgba(255, 71, 87, 0.3);
}

/* Button */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-4) var(--space-6);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

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

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

.btn--primary {
  color: var(--color-text-primary);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--color-accent-hover) 0%, var(--color-accent) 100%);
}

.btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn--secondary {
  color: var(--color-text-primary);
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
}

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

.btn__loader {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.spinner circle {
  stroke-dasharray: 60;
  stroke-dashoffset: 45;
}

@keyframes spin {
  100% {
    transform: rotate(360deg);
  }
}

/* Consent Text */
.consent-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--space-4);
}

/* Success Card */
.success-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-10);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.success-card__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  color: var(--color-success);
  background: rgba(46, 213, 115, 0.1);
  border-radius: 50%;
  border: 2px solid var(--color-success);
}

.success-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.success-card__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

/* Utilities */
[hidden] {
  display: none !important;
}

/* Responsive adjustments */
@media (max-width: 480px) {
  body {
    padding: var(--space-3);
  }

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

  .form-row {
    flex-direction: column;
    gap: var(--space-4);
  }

  .header__title {
    font-size: var(--font-size-xl);
  }
}

@media (min-width: 768px) {
  .container {
    padding-top: var(--space-10);
  }
}