/**
 * Custom Design Submission Portal - Styles
 * 
 * Modern, clean, and mobile-responsive CSS for the design submission form
 * Uses CSS custom properties for theming and consistent spacing
 */

/* ============================================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================================ */

:root {
  /* Colors */
  --color-primary: #1a1a2e;
  --color-primary-light: #16213e;
  --color-accent: #e94560;
  --color-accent-hover: #ff6b6b;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Layout */
  --max-width: 1200px;
  --form-max-width: 800px;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -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-gray-800);
  background-color: var(--color-gray-50);
  min-height: 100vh;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================================================
   LAYOUT
   ============================================================================ */

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-8) var(--spacing-4);
}

@media (min-width: 768px) {
  .main-content {
    padding: var(--spacing-12) var(--spacing-8);
  }
}

/* ============================================================================
   HEADER
   ============================================================================ */

.header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-4) var(--spacing-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  color: var(--color-primary);
}

.logo-image {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.logo-icon {
  width: 40px;
  height: 40px;
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.header-nav {
  display: none;
  gap: var(--spacing-6);
}

@media (min-width: 768px) {
  .header-nav {
    display: flex;
  }
}

.nav-link {
  color: var(--color-gray-600);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
}

/* ============================================================================
   HERO SECTION
   ============================================================================ */

.hero {
  text-align: center;
  padding: var(--spacing-12) 0;
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.025em;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: var(--font-size-4xl);
  }
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* ============================================================================
   PORTAL HEADER (SEO-Optimized)
   ============================================================================ */

.portal-header {
  text-align: center;
  padding: var(--spacing-12) 0;
  max-width: 800px;
  margin: 0 auto var(--spacing-12);
}

.portal-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .portal-header h1 {
    font-size: var(--font-size-4xl);
  }
}

.portal-header h2 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-6);
  line-height: 1.3;
}

@media (min-width: 768px) {
  .portal-header h2 {
    font-size: var(--font-size-3xl);
  }
}

.intro-text {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  line-height: 1.8;
  max-width: 700px;
  margin: 0 auto;
}

.intro-text strong {
  color: var(--color-primary);
}

/* ============================================================================
   MODAL (Capacity Gate)
   ============================================================================ */

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  animation: fadeIn var(--transition-base);
}

.modal-content {
  position: relative;
  background-color: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--transition-slow);
}

.modal-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-6);
  color: var(--color-warning);
}

.modal-icon svg {
  width: 100%;
  height: 100%;
}

.modal-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

.modal-message {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
  line-height: 1.7;
}

.modal-close {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-3) var(--spacing-8);
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-primary-light);
}

/* ============================================================================
   LOADING OVERLAY
   ============================================================================ */

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  background-color: rgba(255, 255, 255, 0.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-4);
}

.loading-overlay[hidden] {
  display: none;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-800);
}

.loading-subtext {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* ============================================================================
   FORM STYLES
   ============================================================================ */

.form-section {
  max-width: var(--form-max-width);
  margin: 0 auto;
}

.design-form {
  background-color: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
  .design-form {
    padding: var(--spacing-10);
  }
}

.form-group-section {
  margin-bottom: var(--spacing-10);
  padding-bottom: var(--spacing-8);
  border-bottom: 1px solid var(--color-gray-200);
}

.form-group-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.section-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.section-description {
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-6);
}

/* Form Fields */
.form-row {
  display: grid;
  gap: var(--spacing-6);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-field {
  margin-bottom: var(--spacing-4);
}

.field-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
}

.required {
  color: var(--color-accent);
}

.optional {
  color: var(--color-gray-500);
  font-weight: 400;
  font-size: var(--font-size-xs);
}

.field-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 26, 46, 0.1);
}

.field-input::placeholder {
  color: var(--color-gray-400);
}

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

.field-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 44px;
}

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

.field-file {
  padding: var(--spacing-3);
  cursor: pointer;
}

.field-hint {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--spacing-2);
}

.field-error {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-error);
  margin-top: var(--spacing-2);
  min-height: 1rem;
}

/* File Upload */
.file-upload-wrapper {
  position: relative;
}

/* Single File Preview (legacy) */
.file-preview {
  margin-top: var(--spacing-3);
  padding: var(--spacing-3);
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.file-preview-image {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.file-preview-name {
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-preview-size {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

/* Multi-Image Preview Grid (v3.0) */
.image-preview-container {
  margin-top: var(--spacing-4);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-3);
}

.image-preview-item {
  position: relative;
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.image-preview-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.image-preview-thumb {
  width: 100%;
  height: 120px;
  object-fit: cover;
  display: block;
}

.image-preview-info {
  padding: var(--spacing-2);
  text-align: center;
}

.image-preview-name {
  font-size: var(--font-size-xs);
  color: var(--color-gray-700);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: block;
  margin-bottom: var(--spacing-1);
}

.image-preview-size {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  display: block;
}

.image-preview-remove {
  position: absolute;
  top: var(--spacing-1);
  right: var(--spacing-1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: rgba(239, 68, 68, 0.9);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.image-preview-item:hover .image-preview-remove {
  opacity: 1;
}

.image-preview-remove:hover {
  background-color: var(--color-error);
}

.image-preview-remove svg {
  width: 14px;
  height: 14px;
}

/* File Size Info */
.file-size-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4);
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.file-size-info svg {
  width: 20px;
  height: 20px;
  color: var(--color-warning);
  flex-shrink: 0;
}

/* Consent Checkbox */
.consent-wrapper {
  margin-top: var(--spacing-4);
}

.consent-checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  cursor: pointer;
}

.consent-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  background-color: var(--color-white);
}

.checkbox-custom::after {
  content: '';
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--color-white);
  border-bottom: 2px solid var(--color-white);
  transform: rotate(-45deg) translate(1px, -1px);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.consent-checkbox input[type="checkbox"]:checked + .checkbox-custom {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.consent-checkbox input[type="checkbox"]:checked + .checkbox-custom::after {
  opacity: 1;
}

.consent-checkbox input[type="checkbox"]:focus + .checkbox-custom {
  box-shadow: 0 0 0 3px rgba(26, 26, 46, 0.1);
}

.consent-text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* Add Design Button */
.btn-add-design {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-add-design:hover {
  background-color: var(--color-gray-200);
  color: var(--color-gray-900);
}

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

/* ============================================================================
   DESIGN BLOCKS (Dynamic Sub-Designs)
   ============================================================================ */

.sub-designs-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.design-block {
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  animation: slideIn var(--transition-base);
}

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

.design-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.design-block-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-800);
}

.design-number {
  color: var(--color-primary);
}

.btn-remove-design {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  color: var(--color-gray-400);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-remove-design:hover {
  background-color: var(--color-error);
  color: var(--color-white);
}

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

.design-block-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

/* ============================================================================
   SUBMIT BUTTON
   ============================================================================ */

.form-actions {
  text-align: center;
  padding-top: var(--spacing-4);
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3);
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-4) var(--spacing-8);
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-xl);
  font-size: var(--font-size-lg);
  font-weight: 600;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
  position: relative;
}

.btn-submit .btn-text {
  display: inline;
}

.btn-submit .btn-loading {
  display: none;
}

/* Loading state - hide text, show spinner */
.btn-submit.loading .btn-text {
  display: none;
}

.btn-submit.loading .btn-loading {
  display: inline-flex;
}

.btn-submit:hover:not(:disabled):not(.loading) {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-3);
}

.btn-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--color-white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.submit-note {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--spacing-4);
}

/* ============================================================================
   SUCCESS SECTION
   ============================================================================ */

.success-section {
  max-width: 500px;
  margin: 0 auto;
}

.success-section[hidden] {
  display: none;
}

.success-content {
  text-align: center;
  background-color: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-10);
  box-shadow: var(--shadow-md);
}

.success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-6);
  color: var(--color-success);
}

.success-icon svg {
  width: 100%;
  height: 100%;
}

.success-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

.success-message {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
  line-height: 1.7;
}

.success-details {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  margin-bottom: var(--spacing-8);
  text-align: left;
}

.success-details p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
}

.success-details p:last-child {
  margin-bottom: 0;
}

.btn-primary {
  display: inline-block;
  padding: var(--spacing-3) var(--spacing-8);
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-gray-200);
  padding: var(--spacing-8) var(--spacing-6);
  margin-top: auto;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-content p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-4);
}

.support-info {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-6);
}

.support-info strong {
  color: var(--color-gray-700);
  font-weight: 600;
}

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

.support-info a:hover {
  text-decoration: underline;
}

.legal-links {
  margin-bottom: var(--spacing-4);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-6);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.copyright {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  margin-top: var(--spacing-6);
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================================ */

@media (max-width: 639px) {
  .design-form {
    padding: var(--spacing-6);
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .section-title {
    font-size: var(--font-size-lg);
  }
  
  .modal-content {
    padding: var(--spacing-6);
  }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
  .header,
  .footer,
  .btn-add-design,
  .btn-remove-design,
  .btn-submit {
    display: none !important;
  }
  
  .design-form {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}