/* ============================================================
   HTML Minifier — Dark Theme Styles
   Freecvt.com
   ============================================================ */

:root {
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: rgba(99, 102, 241, 0.12);
  --color-primary-glow: rgba(99, 102, 241, 0.25);
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-error: #ef4444;
  --color-error-bg: rgba(239, 68, 68, 0.1);
  --color-bg: #0f0f14;
  --color-surface: #1a1a24;
  --color-surface-raised: #22222e;
  --color-text: #e0e0e0;
  --color-text-muted: #9ca3af;
  --color-border: #2a2a3a;
  --color-border-hover: #3a3a4a;
  --font-stack: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
}

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

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

.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; }

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

.skip-link {
  position: absolute; top: -100%; left: 0;
  background: var(--color-primary); color: #fff;
  padding: 0.5rem 1rem; z-index: 100;
  border-radius: 0 0 4px 0; text-decoration: none;
}
.skip-link:focus { top: 0; }

/* Header */
.header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); position: sticky; top: 0; z-index: 50; }
.header-inner { max-width: 1100px; margin: 0 auto; padding: 0.75rem 1rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: nowrap; gap: 0.75rem; }
.logo { display: flex; align-items: center; gap: 0.5rem; text-decoration: none; color: var(--color-primary); font-weight: 700; font-size: 1.1rem; }
.logo:hover { opacity: 0.85; }
.logo svg { flex-shrink: 0; }
nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }
.nav-link { display: inline-block; padding: 0.35rem 0.7rem; text-decoration: none; color: var(--color-text-muted); font-size: 0.8rem; font-weight: 500; border-radius: var(--radius-sm); transition: background var(--transition), color var(--transition); }
.nav-link:hover { background: var(--color-primary-light); color: var(--color-primary); }
.nav-link.active { background: var(--color-primary); color: #fff; }

/* Main */
main { flex: 1; display: flex; flex-direction: column; align-items: center; }
.converter-section { width: 100%; max-width: 720px; padding: 2rem 1.25rem 3rem; }
.page-title { font-size: clamp(1.5rem, 5vw, 2rem); font-weight: 700; text-align: center; margin-bottom: 0.5rem; line-height: 1.2; }
.page-subtitle { text-align: center; color: var(--color-text-muted); font-size: 0.95rem; margin-bottom: 2rem; line-height: 1.5; }

/* Input */
.input-group { margin-bottom: 1rem; }
.input-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--color-text-muted); margin-bottom: 0.4rem; text-transform: uppercase; letter-spacing: 0.04em; }
.text-area {
  width: 100%; padding: 0.85rem 1rem; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  color: var(--color-text); font-family: var(--font-mono); font-size: 0.85rem;
  resize: vertical; transition: border-color var(--transition);
  line-height: 1.5; tab-size: 2;
}
.text-area:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-glow); }
.text-area::placeholder { color: var(--color-text-muted); opacity: 0.6; }
.code-area { font-size: 0.82rem; }
.result-area { background: var(--color-surface-raised); }
.input-hint { font-size: 0.78rem; color: var(--color-text-muted); margin-top: 0.35rem; opacity: 0.7; }

/* File Upload */
.file-upload-section { margin-bottom: 1rem; }
.file-upload-label {
  display: flex; align-items: center; gap: 0.6rem; justify-content: center;
  padding: 0.75rem 1rem; border: 2px dashed var(--color-border);
  border-radius: var(--radius-md); color: var(--color-text-muted); font-size: 0.88rem;
  cursor: pointer; transition: all var(--transition);
}
.file-upload-label:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }

/* File Info */
.file-info { margin-bottom: 1rem; }
.file-info-inner { display: flex; align-items: center; gap: 0.6rem; padding: 0.65rem 0.85rem; background: var(--color-primary-light); border: 1px solid var(--color-primary); border-radius: var(--radius-md); font-size: 0.85rem; }
.file-icon { color: var(--color-primary); flex-shrink: 0; }
.file-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
.file-size { color: var(--color-text-muted); font-size: 0.8rem; flex-shrink: 0; }
.remove-btn { background: none; border: none; font-size: 1.3rem; color: var(--color-text-muted); cursor: pointer; padding: 0 0.25rem; line-height: 1; border-radius: var(--radius-sm); transition: color var(--transition); flex-shrink: 0; }
.remove-btn:hover { color: var(--color-error); }

/* Options */
.options-section { margin-bottom: 1.25rem; }
.options-title { font-size: 0.85rem; font-weight: 600; color: var(--color-text-muted); margin-bottom: 0.6rem; text-transform: uppercase; letter-spacing: 0.04em; }
.options-grid { display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; }
.checkbox-label {
  display: flex; align-items: center; gap: 0.5rem; cursor: pointer;
  font-size: 0.9rem; color: var(--color-text); user-select: none;
}
.checkbox-label input[type="checkbox"] { display: none; }
.checkbox-custom {
  width: 18px; height: 18px; border: 2px solid var(--color-border);
  border-radius: 4px; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition); flex-shrink: 0;
}
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--color-primary); border-color: var(--color-primary);
}
.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
  content: ''; width: 5px; height: 9px; border: solid #fff; border-width: 0 2px 2px 0;
  transform: rotate(45deg); margin-top: -2px;
}
.checkbox-label:hover .checkbox-custom { border-color: var(--color-primary); }

/* Action Buttons */
.action-buttons { display: flex; gap: 0.75rem; margin-top: 1.25rem; }
.convert-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  flex: 1; padding: 0.85rem 1.5rem; background: var(--color-primary);
  color: #fff; border: none; border-radius: var(--radius-md); font-size: 1rem;
  font-weight: 600; font-family: var(--font-stack); cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition), transform 0.1s;
}
.convert-btn:hover:not(:disabled) { background: var(--color-primary-hover); box-shadow: var(--shadow-md); }
.convert-btn:active:not(:disabled) { transform: scale(0.98); }
.convert-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.clear-btn {
  padding: 0.85rem 1.25rem; background: var(--color-surface);
  color: var(--color-text-muted); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500;
  font-family: var(--font-stack); cursor: pointer; transition: all var(--transition);
}
.clear-btn:hover { border-color: var(--color-border-hover); color: var(--color-text); }

/* Error */
.error-msg { display: flex; align-items: center; gap: 0.6rem; margin-top: 1rem; padding: 0.85rem 1rem; background: var(--color-error-bg); border: 1px solid var(--color-error); border-radius: var(--radius-md); color: var(--color-error); font-size: 0.9rem; font-weight: 500; }
.error-icon { flex-shrink: 0; }

/* Size Comparison */
.size-comparison {
  display: flex; align-items: center; justify-content: center; gap: 1rem;
  margin-top: 1.5rem; padding: 1rem 1.25rem; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
}
.size-card { text-align: center; }
.size-label { font-size: 0.75rem; font-weight: 600; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.2rem; }
.size-value { font-size: 1.1rem; font-weight: 700; color: var(--color-text); font-family: var(--font-mono); }
.size-card-after .size-value { color: var(--color-success); }
.size-arrow { font-size: 1.3rem; color: var(--color-text-muted); }
.size-reduction {
  padding: 0.3rem 0.7rem; background: var(--color-success-bg);
  color: var(--color-success); border-radius: var(--radius-sm);
  font-weight: 700; font-size: 0.9rem; font-family: var(--font-mono);
}

/* Result */
.result-section { margin-top: 1.5rem; }
.result-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.5rem; flex-wrap: wrap; gap: 0.5rem; }
.result-label { font-size: 0.9rem; font-weight: 600; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.result-actions { display: flex; gap: 0.5rem; }
.copy-btn, .download-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.45rem 0.85rem; background: var(--color-surface);
  color: var(--color-text-muted); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); font-size: 0.8rem; font-weight: 500;
  font-family: var(--font-stack); cursor: pointer; transition: all var(--transition);
}
.copy-btn:hover, .download-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.copy-btn.copied { border-color: var(--color-success); color: var(--color-success); }

/* Features */
.features { width: 100%; max-width: 900px; padding: 2rem 1.25rem 3rem; }
.features-title { text-align: center; font-size: 1.25rem; font-weight: 700; margin-bottom: 1.5rem; }
.features-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.feature-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.25rem; text-align: center; }
.feature-icon { color: var(--color-primary); margin-bottom: 0.5rem; }
.feature-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.35rem; }
.feature-card p { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.5; }

/* Footer */
.footer { text-align: center; padding: 1.5rem 1rem; color: var(--color-text-muted); font-size: 0.8rem; border-top: 1px solid var(--color-border); }

/* Responsive */
@media (min-width: 640px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .header-inner { flex-wrap: wrap; }
  nav { width: 100%; justify-content: center; }
  .action-buttons { flex-direction: column; }
  .result-header { flex-direction: column; align-items: flex-start; }
  .size-comparison { flex-wrap: wrap; gap: 0.75rem; }
}