/* ============================================
   Dislink Tools - Unified Stylesheet
   Clean, modern design for Minecraft converter tools
   ============================================ */

/* --- Variables --- */
:root {
  --color-bg: #f0f2f5;
  --color-surface: #ffffff;
  --color-surface-alt: #f8fafc;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-light: #eff6ff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

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

html {
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
}

/* --- Container --- */
.tool-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

/* --- Page Header --- */
.page-header {
  text-align: center;
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}

.page-header .back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 0.5rem;
  transition: color 0.15s;
}

.page-header .back-home:hover {
  color: var(--color-primary);
}

.page-header .subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* --- Cards / Sections --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.card-header {
  padding: 0.875rem 1.25rem;
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-body {
  padding: 1.25rem;
}

/* --- Form Controls --- */
.form-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

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

.form-group label {
  font-size: 0.875rem;
  color: var(--color-text);
  font-weight: 500;
  min-width: 8rem;
  flex-shrink: 0;
}

.form-group .label-auto {
  min-width: auto;
}

.form-group .label-short {
  min-width: 4rem;
}

/* --- File Upload --- */
.file-upload-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem;
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.file-upload-wrapper:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.file-upload-wrapper input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  cursor: pointer;
}

.file-upload-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.file-upload-icon {
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-text-muted);
  transition: all 0.2s;
}

.file-upload-wrapper:hover .file-upload-icon {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* --- Text Inputs --- */
input[type="text"],
input[type="number"],
textarea,
select {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}

input[type="text"]:hover,
input[type="number"]:hover,
select:hover {
  border-color: var(--color-primary);
}

input[type="number"] {
  width: 5rem;
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* --- Select --- */
select {
  cursor: pointer;
  min-width: 8rem;
  padding-right: 1.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  appearance: none;
  -webkit-appearance: none;
}

select[multiple] {
  background-image: none;
  padding-right: 0.65rem;
  min-height: 5rem;
}

/* --- Checkbox & Radio --- */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--color-border-strong);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

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

input[type="checkbox"]:checked::after {
  content: "";
  display: block;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  position: absolute;
  top: 1px;
  left: 3.5px;
}

input[type="checkbox"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}

/* --- Range Slider --- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  width: 10rem;
  flex-shrink: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid white;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid white;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

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

.btn-success {
  background: var(--color-success);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-success:hover {
  background: #16a34a;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* --- Status --- */
.status-bar {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  min-height: 2.75rem;
  display: flex;
  align-items: center;
}

.status-bar.error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #dc2626;
}

.status-bar.info {
  background: var(--color-primary-light);
  border-color: #bfdbfe;
  color: #1d4ed8;
}

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

table td, table th {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: middle;
}

table td:first-child {
  white-space: nowrap;
}

table input[type="text"],
table input[type="number"] {
  width: 100%;
  min-width: 0;
  font-size: 0.8rem;
  padding: 0.3rem 0.5rem;
}

/* --- Sound Mapping Table (MIDI converters) --- */
.sound-mapping {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.sound-mapping td, .sound-mapping th {
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: middle;
  line-height: 1.4;
}

.sound-mapping th {
  background: var(--color-surface-alt);
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.sound-mapping td:first-child {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sound-mapping .sound-value-input {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-primary);
  width: 100%;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  background: var(--color-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  min-width: 7rem;
}

.sound-mapping .sound-value-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.sound-mapping .sound-value-input:hover {
  border-color: var(--color-primary);
}

.sound-mapping .num-input {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  width: 100%;
  max-width: 4.5rem;
  padding: 0.2rem 0.3rem;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  background: var(--color-surface);
  text-align: center;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  -moz-appearance: textfield;
}

.sound-mapping .num-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}

.sound-mapping .num-input:hover {
  border-color: var(--color-primary);
}

.sound-mapping .num-input::-webkit-outer-spin-button,
.sound-mapping .num-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* --- Info Display (h3 inside fieldset) --- */
.info-display {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.info-display:last-child {
  margin-bottom: 0;
}

/* --- Notices / Tips --- */
.notice {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-top: 0.5rem;
  line-height: 1.5;
}

.notice a {
  color: var(--color-primary);
  text-decoration: none;
}

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

/* --- Inline Unit Labels --- */
.unit-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

/* --- Separator --- */
.separator {
  height: 1px;
  background: var(--color-border);
  margin: 0.75rem 0;
}

/* --- Footer --- */
.page-footer {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

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

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

.page-footer .footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.page-footer .footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.page-footer .footer-icon {
  width: 1.25rem;
  height: 1.25rem;
  vertical-align: middle;
  border-radius: 2px;
}

/* --- Canvas Preview --- */
canvas {
  max-width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

/* --- Hidden utility --- */
.hidden {
  display: none !important;
}

/* --- Inline group (for checkbox+label side by side) --- */
.inline-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.inline-group label {
  min-width: auto;
  font-weight: 400;
  font-size: 0.875rem;
}

/* --- Form row (for compact layouts) --- */
.form-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.65rem;
}

/* --- Responsive --- */
@media (max-width: 600px) {
  body {
    padding: 1rem 0.75rem;
  }

  .page-header h1 {
    font-size: 1.35rem;
  }

  .card-body {
    padding: 1rem;
  }

  .form-group {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .form-group label {
    min-width: auto;
  }

  input[type="range"] {
    width: 100%;
  }

  .file-upload-wrapper {
    padding: 1rem;
  }

  .page-header {
    margin-bottom: 1.25rem;
  }
}

/* --- MIDI Waterfall Player --- */

.waterfall-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.waterfall-header .wf-title {
  flex-shrink: 0;
}

.waterfall-controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.waterfall-controls .wf-btn {
  padding: 0.25rem 0.7rem;
  font-size: 0.78rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 500;
  transition: all 0.12s;
  line-height: 1.4;
}

.waterfall-controls .wf-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.waterfall-controls .wf-btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: #fff;
}

.waterfall-controls .wf-speed {
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  min-width: 4rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  outline: none;
  cursor: pointer;
  background: var(--color-surface);
  color: var(--color-text);
}

.waterfall-controls .wf-speed:focus {
  border-color: var(--color-primary);
}

.waterfall-controls label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 0.2rem;
  white-space: nowrap;
}

#waterfall-container {
  position: relative;
  width: 100%;
}

#waterfall-container canvas {
  display: block;
  width: 100%;
  border-radius: var(--radius-sm);
}

.waterfall-timeline {
  width: 100%;
  padding: 0.2rem 0;
}

.waterfall-timeline input[type="range"] {
  width: 100%;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  outline: none;
  background: linear-gradient(to right, var(--color-primary) 0%, var(--color-primary) var(--progress, 0%), var(--color-border) var(--progress, 0%), var(--color-border) 100%);
}

.waterfall-timeline input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid #fff;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform 0.1s;
}

.waterfall-timeline input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.waterfall-timeline input[type="range"]::-moz-range-track {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-border);
  border: none;
}

.waterfall-timeline input[type="range"]::-moz-range-progress {
  height: 6px;
  border-radius: 3px;
  background: var(--color-primary);
}

.waterfall-timeline input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid #fff;
  cursor: pointer;
}

.waterfall-time-display {
  display: flex;
  justify-content: space-between;
  padding: 0 0.25rem;
}

.waterfall-time-display span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-secondary);
}

@media (max-width: 600px) {
  .waterfall-header {
    flex-wrap: wrap;
  }
  .waterfall-controls {
    margin-left: 0;
    width: 100%;
  }
}