/* =============================================================================
   TECHPACK — Web Upload Interface Styles
   Mobile-first, WCAG 2.0 AA compliant
   
   Color contrast ratios (all pass AA):
     - #111111 on #FFFFFF = 18.9:1  (primary text)
     - #4A4A4A on #FFFFFF = 7.7:1   (secondary text)
     - #FFFFFF on #111111 = 18.9:1  (inverse)
     - #FFFFFF on #1A56DB = 7.1:1   (primary button)
     - #111111 on #F3F4F6 = 15.4:1  (card backgrounds)
     - #B91C1C on #FFFFFF = 5.8:1   (error text)
     - #15803D on #FFFFFF = 4.6:1   (success)
   ============================================================================= */

/* ── CSS Custom Properties ─────────────────────────────────────────────────── */
:root {
  /* Colors — all pairs pass WCAG AA 4.5:1 minimum */
  --color-black: #111111;
  --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;

  --color-primary: #1A56DB;
  --color-primary-hover: #1544B5;
  --color-primary-light: #E1EFFE;

  --color-error: #B91C1C;
  --color-error-bg: #FEF2F2;
  --color-success: #15803D;
  --color-success-bg: #F0FDF4;
  --color-warning: #92400E;
  --color-warning-bg: #FFFBEB;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --line-height: 1.5;

  /* 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;
  --space-16: 4rem;

  /* Borders & Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --border: 1px solid var(--color-gray-200);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --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);

  /* Touch targets — WCAG minimum 44x44px */
  --touch-min: 44px;

  /* Focus ring */
  --focus-ring: 0 0 0 3px rgba(26, 86, 219, 0.5);

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

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

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

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--line-height);
  color: var(--color-black);
  background-color: var(--color-gray-50);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* Ensure hidden attribute always wins over display properties */
[hidden] {
  display: none !important;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

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

/* ── Skip link — WCAG §2.4.1 ───────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 10000;
  padding: var(--space-3) var(--space-4);
  background: var(--color-black);
  color: var(--color-white);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

/* ── Focus styles — WCAG §2.4.7 ────────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ── Header ─────────────────────────────────────────────────────────────────── */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-black);
  color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-800);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  max-width: 1200px;
  margin: 0 auto;
  min-height: var(--touch-min);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-white);
  text-decoration: none;
  font-weight: 700;
}

.logo:hover {
  color: var(--color-white);
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 800;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.logo-text {
  font-size: var(--text-lg);
  letter-spacing: 0.1em;
}

/* Mobile menu button */
.nav-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  justify-content: center;
  align-items: center;
  width: var(--touch-min);
  height: var(--touch-min);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.hamburger-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-menu-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav menu */
.nav-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-gray-900);
  list-style: none;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-gray-700);
}

.nav-menu[aria-expanded="true"],
.nav-menu.is-open {
  display: block;
}

.nav-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-gray-300);
  text-decoration: none;
  font-size: var(--text-base);
  min-height: var(--touch-min);
  line-height: var(--touch-min);
  transition: color var(--transition-fast), background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-white);
  background: var(--color-gray-800);
}

.nav-link--action {
  color: var(--color-gray-400);
}

/* ── Desktop nav ────────────────────────────────────────────────────────────── */
@media (min-width: 768px) {
  .nav-menu-btn {
    display: none;
  }

  .nav-menu {
    display: flex;
    position: static;
    background: none;
    border: none;
    padding: 0;
    gap: var(--space-1);
    align-items: center;
  }

  .nav-link {
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    min-height: auto;
    line-height: var(--line-height);
    font-size: var(--text-sm);
  }
}

/* ── Container ──────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: var(--space-8);
  }
}

/* ── Main content ───────────────────────────────────────────────────────────── */
.main-content {
  min-height: calc(100vh - 60px);
}

.main-content:focus {
  outline: none;
}

.view {
  animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Breadcrumb ─────────────────────────────────────────────────────────────── */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  gap: var(--space-1);
  padding: var(--space-2) 0 var(--space-4);
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin-left: var(--space-1);
  color: var(--color-gray-400);
}

.breadcrumb a {
  color: var(--color-gray-600);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-black);
  font-weight: 500;
}

/* ── Typography ─────────────────────────────────────────────────────────────── */
.page-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

@media (min-width: 768px) {
  .page-title {
    font-size: var(--text-3xl);
  }
}

.section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-4);
}

.subsection-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-3);
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.25;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  min-height: var(--touch-min);
  min-width: var(--touch-min);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-100);
  border-color: var(--color-gray-400);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-600);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-gray-100);
  color: var(--color-black);
}

.btn-danger {
  background: var(--color-error);
  color: var(--color-white);
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background: #991B1B;
  border-color: #991B1B;
}

.btn-full {
  width: 100%;
}

/* --- Dev Login (development only — remove before production) --- */
.dev-login-section {
  margin-top: 1.5rem;
}

.dev-login-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  color: #f59e0b;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.dev-login-divider::before,
.dev-login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #f59e0b40;
}

.btn-dev {
  background: #78350f;
  color: #fbbf24;
  border: 1px dashed #f59e0b;
  font-weight: 600;
}

.btn-dev:hover:not(:disabled) {
  background: #92400e;
  color: #fde68a;
  border-color: #fbbf24;
}

.dev-login-hint {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-gray-500);
  text-align: center;
}

.dev-login-hint code {
  background: var(--color-gray-100);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  font-size: 0.7rem;
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  min-height: 36px;
}

.btn-icon {
  flex-shrink: 0;
}

.btn-icon--right {
  margin-left: var(--space-1);
}

/* Button spinner */
.btn-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ── Status badges ──────────────────────────────────────────────────────────── */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.status-badge--draft {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.status-badge--in_progress {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

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

.status-badge--submitted {
  background: #EDE9FE;
  color: #6D28D9;
}

/* ── Auth View ──────────────────────────────────────────────────────────────── */
.view-auth {
  display: flex;
  align-items: center;
  min-height: calc(100vh - 60px);
}

.auth-container {
  width: 100%;
  max-width: 440px;
  margin: 0 auto;
  padding: var(--space-4);
}

.auth-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  border: var(--border);
}

@media (max-width: 480px) {
  .auth-card {
    padding: var(--space-6);
    border-radius: var(--radius-lg);
  }
}

.auth-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-2);
}

.auth-subtitle {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  text-align: center;
  margin-bottom: var(--space-6);
}

.auth-tabs {
  display: flex;
  border-bottom: 2px solid var(--color-gray-200);
  margin-bottom: var(--space-6);
}

.auth-tab {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-500);
  cursor: pointer;
  min-height: var(--touch-min);
  transition: all var(--transition-fast);
}

.auth-tab:hover {
  color: var(--color-black);
}

.auth-tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ── Forms ───────────────────────────────────────────────────────────────────── */
.form-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border: var(--border);
}

@media (min-width: 768px) {
  .form-card {
    padding: var(--space-8);
  }
}

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

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0;
}

@media (min-width: 480px) {
  .form-row {
    flex-direction: row;
    gap: var(--space-4);
  }

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

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

.form-optional {
  font-weight: 400;
  color: var(--color-gray-400);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: inherit;
  font-size: var(--text-base);
  line-height: var(--line-height);
  color: var(--color-black);
  background: var(--color-white);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: var(--touch-min);
  /* 16px font prevents iOS auto-zoom */
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-400);
}

.form-input[aria-invalid="true"],
.form-select[aria-invalid="true"],
.form-textarea[aria-invalid="true"] {
  border-color: var(--color-error);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%234B5563' d='M4.427 6.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 6H4.604a.25.25 0 00-.177.427z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  background-size: 16px;
  padding-right: var(--space-10);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-error {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-error);
  margin-top: var(--space-1);
  min-height: 0;
}

.form-error:empty {
  display: none;
}

.form-error--global {
  text-align: center;
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--color-error-bg);
  border-radius: var(--radius-sm);
}

.form-error--global:empty {
  display: none;
}

.form-help {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-5);
  line-height: var(--line-height);
}

.form-actions {
  margin-top: var(--space-6);
  display: flex;
  justify-content: flex-end;
}

.form-actions--split {
  justify-content: space-between;
}

/* ── Step Indicator ─────────────────────────────────────────────────────────── */
.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: var(--space-8);
  padding: var(--space-4) 0;
}

.step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-gray-400);
}

.step--active {
  color: var(--color-primary);
}

.step--complete {
  color: var(--color-success);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid currentColor;
  font-size: var(--text-sm);
  font-weight: 700;
  flex-shrink: 0;
}

.step--active .step-number {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.step--complete .step-number {
  background: var(--color-success);
  color: var(--color-white);
  border-color: var(--color-success);
}

.step-label {
  font-size: var(--text-xs);
  font-weight: 600;
  display: none;
}

@media (min-width: 480px) {
  .step-label {
    display: inline;
    font-size: var(--text-sm);
  }
}

.step-connector {
  width: 40px;
  height: 2px;
  background: var(--color-gray-300);
  margin: 0 var(--space-2);
  flex-shrink: 0;
}

@media (min-width: 480px) {
  .step-connector {
    width: 60px;
  }
}

/* ── Colorway List ──────────────────────────────────────────────────────────── */
.colorway-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.colorway-item {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: flex-end;
  padding: var(--space-4);
  background: var(--color-gray-50);
  border: var(--border);
  border-radius: var(--radius-md);
}

.colorway-item .form-group {
  margin-bottom: 0;
  flex: 1;
  min-width: 140px;
}

.colorway-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-min);
  height: var(--touch-min);
  background: none;
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  color: var(--color-gray-500);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.colorway-remove:hover {
  border-color: var(--color-error);
  color: var(--color-error);
  background: var(--color-error-bg);
}

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

/* Colorway chips (detail view) */
.colorway-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.colorway-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
}

.colorway-swatch {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid var(--color-gray-300);
  flex-shrink: 0;
}

/* ── Dashboard ──────────────────────────────────────────────────────────────── */
.dashboard-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

@media (min-width: 480px) {
  .dashboard-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.style-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 600px) {
  .style-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .style-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.style-card {
  background: var(--color-white);
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.style-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-gray-300);
}

.style-card:focus-visible {
  box-shadow: var(--focus-ring);
}

.style-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.style-card__number {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-black);
}

.style-card__name {
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  margin-bottom: var(--space-2);
}

.style-card__type {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.style-card__date {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-top: var(--space-2);
}

/* ── Empty State ────────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--color-gray-500);
}

.empty-icon {
  margin: 0 auto var(--space-4);
  color: var(--color-gray-300);
}

.empty-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.empty-desc {
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.empty-inline {
  padding: var(--space-6);
  text-align: center;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  border: 2px dashed var(--color-gray-200);
}

/* ── Loading ────────────────────────────────────────────────────────────────── */
.loading-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--color-gray-500);
}

.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: var(--space-3);
}

/* ── Upload Dropzone ────────────────────────────────────────────────────────── */
.upload-dropzone {
  position: relative;
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-6);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: var(--color-white);
}

.upload-dropzone:hover,
.upload-dropzone:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.upload-dropzone.is-dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  border-style: solid;
}

.upload-dropzone--compact {
  padding: var(--space-6) var(--space-4);
}

.dropzone-content {
  pointer-events: none;
}

.dropzone-icon {
  margin: 0 auto var(--space-3);
  color: var(--color-gray-400);
}

.upload-dropzone:hover .dropzone-icon,
.upload-dropzone.is-dragover .dropzone-icon {
  color: var(--color-primary);
}

.dropzone-text {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  margin-bottom: var(--space-2);
}

.dropzone-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}

.dropzone-hint {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
}

/* Mobile/desktop text switching */
.dropzone-text--mobile {
  display: inline;
}

.dropzone-text--desktop {
  display: none;
}

@media (min-width: 768px) {
  .dropzone-text--mobile {
    display: none;
  }

  .dropzone-text--desktop {
    display: inline;
  }
}

/* ── Upload Queue ───────────────────────────────────────────────────────────── */
.upload-queue {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.upload-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-white);
  border: var(--border);
  border-radius: var(--radius-md);
}

.upload-item__preview {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: var(--color-gray-100);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.upload-item__preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.upload-item__preview--icon {
  color: var(--color-gray-400);
}

.upload-item__info {
  flex: 1;
  min-width: 0;
}

.upload-item__name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-black);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-item__size {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.upload-item__progress {
  width: 100%;
  height: 4px;
  background: var(--color-gray-200);
  border-radius: 2px;
  margin-top: var(--space-1);
  overflow: hidden;
}

.upload-item__progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width var(--transition-fast);
}

.upload-item__status {
  font-size: var(--text-xs);
  font-weight: 600;
  flex-shrink: 0;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.upload-item__status--uploading {
  color: var(--color-primary);
}

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

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

.upload-item__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-400);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  padding: 0;
}

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

/* ── Artwork Assignments ────────────────────────────────────────────────────── */
.artwork-assignments {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: var(--border);
}

.assignment-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.assignment-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-gray-50);
  border: var(--border);
  border-radius: var(--radius-md);
}

@media (min-width: 600px) {
  .assignment-item {
    flex-direction: row;
    align-items: flex-end;
  }
}

.assignment-item__preview {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: var(--color-gray-200);
  flex-shrink: 0;
  overflow: hidden;
}

.assignment-item__preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.assignment-item__fields {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.assignment-item__fields .form-group {
  margin-bottom: 0;
  flex: 1;
  min-width: 140px;
}

/* ── Artwork Grid (Detail View) ─────────────────────────────────────────────── */
.artwork-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

@media (min-width: 600px) {
  .artwork-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .artwork-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.artwork-thumb {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border);
  background: var(--color-gray-100);
}

.artwork-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.artwork-thumb__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2);
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: var(--color-white);
}

.artwork-thumb__name {
  font-size: var(--text-xs);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.artwork-thumb__zone {
  font-size: 0.625rem;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.artwork-thumb__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--color-gray-400);
}

/* ── Detail View ────────────────────────────────────────────────────────────── */
.detail-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

@media (min-width: 480px) {
  .detail-header {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}

.detail-meta {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.detail-section {
  margin-bottom: var(--space-8);
}

.detail-upload-area {
  margin-top: var(--space-4);
}

.detail-actions {
  padding-top: var(--space-6);
  border-top: var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ── Toast Notifications ────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

@media (min-width: 600px) {
  .toast-container {
    left: auto;
    right: var(--space-6);
    max-width: 400px;
  }
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-gray-900);
  color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn 300ms ease, toastOut 300ms ease 4700ms forwards;
  font-size: var(--text-sm);
}

.toast--success {
  background: #065F46;
}

.toast--error {
  background: #7F1D1D;
}

.toast--warning {
  background: #78350F;
}

.toast__dismiss {
  background: none;
  border: none;
  color: inherit;
  opacity: 0.7;
  cursor: pointer;
  padding: var(--space-1);
  margin-left: auto;
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toast__dismiss:hover {
  opacity: 1;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(16px); }
}

/* ── Reduced motion ─────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ── High contrast mode ─────────────────────────────────────────────────────── */
@media (forced-colors: active) {
  .btn {
    border: 2px solid ButtonText;
  }

  .upload-dropzone {
    border: 2px solid ButtonText;
  }

  .colorway-swatch {
    forced-color-adjust: none;
  }
}

/* ── Print ──────────────────────────────────────────────────────────────────── */
@media print {
  .app-header,
  .toast-container,
  .skip-link,
  .btn,
  .upload-dropzone {
    display: none !important;
  }
}