/* ========================================
   Art Walk Weekends – Image Preparation Tool
   Design tokens & styles
   ======================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Primary blues */
  --clr-primary: #0774B0;
  --clr-primary-light: #6FB0C7;
  --clr-primary-lighter: #7DBEF4;

  /* Secondary greens */
  --clr-secondary: #6C8811;
  --clr-secondary-mid: #92B233;
  --clr-secondary-light: #C6E56C;

  /* Accent / errors */
  --clr-accent: #FF4539;
  --clr-error: #C0392B;        /* Darker red for WCAG AA */
  --clr-error-bg: #FEF0EF;

  /* Success */
  --clr-success: #27AE60;
  --clr-success-bg: #EAFAF1;

  /* Neutrals */
  --clr-text: #263D45;
  --clr-text-light: #5A7A85;
  --clr-bg: #FFFFFF;
  --clr-bg-muted: #E8EEF1;
  --clr-bg-thumbnail: #D0DCE1;
  --clr-border: #D0DCE1;
  --clr-border-light: #D5DEE3;

  /* Typography */
  --font-family: 'IBM Plex Mono', monospace;
  --fs-xs: 0.75rem;
  --fs-sm: 0.8125rem;
  --fs-base: 0.9375rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.5rem;
  --fs-xl: 1.875rem;

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

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(38, 61, 69, 0.08);
  --shadow-md: 0 4px 12px rgba(38, 61, 69, 0.1);
}

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

/* ---------- x-cloak: hide until Alpine initializes ---------- */
[x-cloak] {
  display: none !important;
}

/* ---------- 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: 0;
}

/* ---------- Body ---------- */
body {
  font-family: var(--font-family);
  font-weight: 400;
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--clr-text);
  background: var(--clr-bg-muted);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- App Container ---------- */
.app-container {
  max-width: 750px;
  margin: 0 auto;
  padding: var(--sp-8) var(--sp-6);
  min-height: 100vh;
}

/* ---------- Header ---------- */
.app-header {
  text-align: center;
  margin-bottom: var(--sp-4);
}

.app-logo {
  max-width: 220px;
  width: 100%;
  height: auto;
}

/* ---------- Footer ---------- */
.app-footer {
  margin-top: var(--sp-12);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--clr-border-light);
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--clr-text-light);
}

/* ---------- Step Panels ---------- */
.step-panel {
  background: var(--clr-bg);
  border-radius: var(--radius-lg);
  padding: var(--sp-8);
  box-shadow: var(--shadow-md);
}

.step-heading {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin-bottom: var(--sp-3);
  color: var(--clr-text);
}

.step-description {
  font-size: var(--fs-base);
  color: var(--clr-text-light);
  margin-bottom: var(--sp-6);
  font-weight: 300;
}

.step-note {
  font-size: var(--fs-base);
  color: #000;
  margin-bottom: var(--sp-6);
}

/* Browser warning */
.browser-warning {
  border: 2px solid var(--clr-error);
  background: var(--clr-error-bg);
}

.browser-warning .step-heading {
  color: var(--clr-error);
}

/* Transitions */
.step-enter {
  animation: fadeSlideIn 0.3s ease-out;
}

.step-leave {
  animation: fadeSlideOut 0.2s ease-in;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ---------- Rules Card ---------- */
.rules-card {
  background: var(--clr-bg-muted);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-md);
  padding: var(--sp-5);
  margin-bottom: var(--sp-8);
}

.rules-heading {
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--clr-primary);
  margin-bottom: var(--sp-3);
}

.rules-list {
  list-style: none;
  padding: 0;
}

.rules-list li {
  position: relative;
  padding-left: var(--sp-6);
  margin-bottom: var(--sp-2);
  font-size: var(--fs-sm);
}

.rules-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--clr-secondary-mid);
  font-weight: 700;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-family);
  font-size: var(--fs-sm);
  font-weight: 700;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-6);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  line-height: 1.4;
}

.btn:focus-visible {
  outline: 3px solid var(--clr-primary-lighter);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
}

.btn-primary:hover:not(:disabled) {
  background: #065e91;
  border-color: #065e91;
}

.btn-secondary {
  background: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--clr-bg-muted);
  border-color: var(--clr-primary-light);
}

.btn-sm {
  font-size: var(--fs-xs);
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-sm);
}

.btn-lg {
  font-size: var(--fs-base);
  padding: var(--sp-4) var(--sp-8);
}

.btn-row {
  display: flex;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

.btn-row--center {
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Name Form ---------- */
.name-form {
  margin-bottom: var(--sp-4);
}

.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 700;
  margin-bottom: var(--sp-2);
}

.form-input {
  display: block;
  width: 100%;
  font-family: var(--font-family);
  font-size: var(--fs-base);
  padding: var(--sp-3) var(--sp-4);
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  background: var(--clr-bg);
  color: var(--clr-text);
  transition: border-color 0.15s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(7, 116, 176, 0.15);
}

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

.form-input--error:focus {
  border-color: var(--clr-error);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.15);
}

.form-error {
  color: var(--clr-error);
  font-size: var(--fs-sm);
  margin-top: var(--sp-2);
}

.name-preview {
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  margin-top: var(--sp-3);
  padding: var(--sp-3);
  background: var(--clr-bg-muted);
  border-radius: var(--radius-sm);
}

.name-preview strong {
  color: var(--clr-primary);
}

/* ---------- Drop Zone ---------- */
.dropzone {
  border: 2px dashed var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-10) var(--sp-6);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom: var(--sp-6);
  background: var(--clr-bg);
}

.dropzone:hover {
  border-color: var(--clr-primary-light);
  background: rgba(7, 116, 176, 0.03);
}

.dropzone:focus-visible {
  outline: 3px solid var(--clr-primary-lighter);
  outline-offset: 2px;
}

.dropzone--active {
  border-color: var(--clr-primary);
  background: rgba(7, 116, 176, 0.06);
  border-style: solid;
}

.dropzone-icon {
  width: 40px;
  height: 40px;
  color: var(--clr-primary-light);
  margin-bottom: var(--sp-3);
}

.dropzone-text {
  font-size: var(--fs-base);
  font-weight: 400;
  color: var(--clr-text);
  margin-bottom: var(--sp-2);
}

.dropzone-hint {
  font-size: var(--fs-xs);
  color: var(--clr-text-light);
}

/* ---------- Info Message ---------- */
.info-message {
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  background: var(--clr-bg-muted);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-sm);
  padding: var(--sp-3) var(--sp-4);
  margin-bottom: var(--sp-4);
  text-align: center;
}

/* ---------- Slot Grid ---------- */
.slot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-4);
  margin-bottom: var(--sp-6);
}

.slot {
  position: relative;
  aspect-ratio: 1;
  border: 2px solid var(--clr-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--clr-bg);
  transition: border-color 0.2s ease;
}

/* Slot states */
.slot--empty {
  border-style: dashed;
  cursor: pointer;
}

.slot--empty:hover {
  border-color: var(--clr-primary-light);
  background: rgba(7, 116, 176, 0.03);
}

.slot--validating {
  border-color: var(--clr-primary-light);
}

.slot--valid {
  border-color: var(--clr-success);
}

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

.slot--processing {
  border-color: var(--clr-primary);
  animation: pulseBorder 1.5s ease-in-out infinite;
}

.slot--done {
  border-color: var(--clr-success);
}

@keyframes pulseBorder {
  0%, 100% { border-color: var(--clr-primary); }
  50% { border-color: var(--clr-primary-lighter); }
}

/* Slot inner elements */
.slot-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: var(--sp-1);
}

.slot-plus {
  width: 32px;
  height: 32px;
  color: var(--clr-border);
}

.slot--empty:hover .slot-plus {
  color: var(--clr-primary-light);
}

.slot-label {
  position: absolute;
  bottom: 5px;
  left: 5px;
  width: 28px;
  height: 28px;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--clr-text-light);
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 1px 4px;
}

.slot-label::before {
  content: '';
  position: absolute;
  bottom: -5px;
  left: -5px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 46px 0 0 46px;
  border-color: transparent transparent transparent var(--clr-border);
  z-index: -1;
}

/* Thumbnail */
.slot-thumbnail-wrap {
  position: relative;
  width: 100%;
  height: 100%;
}

.slot-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--clr-bg-thumbnail);
  padding: 5px;
}

/* Overlay */
.slot-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.7);
}

/* Spinner */
.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--clr-border);
  border-top-color: var(--clr-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Badge */
.slot-badge {
  position: absolute;
  top: var(--sp-2);
  right: var(--sp-2);
  width: 24px;
  height: 24px;
  background: var(--clr-success);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slot-badge svg {
  width: 14px;
  height: 14px;
}

/* Delete overlay */
.slot-delete-overlay {
  position: absolute;
  inset: 0;
  background: rgba(38, 61, 69, 0.75);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
}

.btn-delete {
  background: var(--clr-error);
  color: #fff;
  border-color: var(--clr-error);
}

.btn-delete:hover {
  background: #a93226;
  border-color: #a93226;
}

.slot-delete-overlay .btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}

.slot-delete-overlay .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.6);
}

.slot--valid .slot-thumbnail-wrap {
  cursor: pointer;
}

.slot-number {
  position: absolute;
  bottom: 5px;
  left: 5px;
  width: 28px;
  height: 28px;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: #fff;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 1px 4px;
}

.slot-number::before {
  content: '';
  position: absolute;
  bottom: -5px;
  left: -5px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 46px 0 0 46px;
  border-color: transparent transparent transparent var(--clr-success);
  z-index: -1;
}

/* Error slot */
.slot-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--sp-3);
  text-align: center;
  gap: var(--sp-2);
}

.slot-error-icon {
  width: 24px;
  height: 24px;
  color: var(--clr-error);
  flex-shrink: 0;
}

.slot-error-text {
  font-size: 0.65rem;
  color: var(--clr-error);
  line-height: 1.3;
}

/* ---------- Process Section ---------- */
.process-section {
  margin-bottom: var(--sp-4);
}

/* ---------- Progress Bar ---------- */
.progress-wrap {
  max-width: 400px;
  margin: var(--sp-6) auto 0;
}

.progress-bar {
  height: 8px;
  background: var(--clr-border-light);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--sp-3);
}

.progress-fill {
  height: 100%;
  background: var(--clr-primary);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  text-align: center;
}

/* ---------- Results List ---------- */
.results-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-bottom: var(--sp-8);
}

.result-row {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  background: var(--clr-bg-muted);
  border: 1px solid var(--clr-border-light);
  border-radius: var(--radius-md);
  padding: var(--sp-2);
}

.result-thumbnail {
  width: 56px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--clr-bg-thumbnail);
  padding: 3px;
}

.result-filename {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--clr-text);
  word-break: break-all;
  flex: 1;
  min-width: 0;
}

.result-size {
  font-size: var(--fs-sm);
  color: var(--clr-text-light);
  flex-shrink: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .app-container {
    padding: var(--sp-4) var(--sp-5);
  }

  .step-panel {
    padding: var(--sp-5);
  }

  .step-heading {
    font-size: var(--fs-md);
  }

  .slot-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-3);
  }

  .dropzone {
    padding: var(--sp-6) var(--sp-4);
  }

  .btn-row {
    flex-direction: column-reverse;
  }

  .btn-row .btn {
    width: 100%;
  }
}

@media (max-width: 400px) {
  .slot-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .result-row {
    display: grid;
    grid-template-columns: 64px 1fr;
    grid-template-areas:
      "thumb filename"
      "thumb size"
      "btn btn";
    gap: var(--sp-1) var(--sp-3);
    align-items: center;
    padding: var(--sp-3);
  }

  .result-thumbnail {
    grid-area: thumb;
    width: 64px;
    height: 64px;
    align-self: center;
  }

  .result-filename {
    grid-area: filename;
    align-self: end;
  }

  .result-size {
    grid-area: size;
    align-self: start;
  }

  .result-row .btn {
    grid-area: btn;
    width: 100%;
    margin-top: var(--sp-2);
  }
}