/* ===================================================================
   Algo Tools — Image Resizer
   Theme tokens — change these to re-skin the whole tool
=================================================================== */
:root {
  /* Color — Ink Navy base with Violet / Signal Teal accents */
  --c-bg: #0A0E1A;
  --c-bg-alt: #0F1526;
  --c-surface: #151C30;
  --c-surface-2: #1B233C;
  --c-border: #262F4A;
  --c-text: #F4F6FB;
  --c-text-muted: #9AA3BD;
  --c-text-faint: #6B7590;
  --c-accent: #33e496;
  --c-accent-soft: rgba(51, 228, 150, 0.14);
  --c-accent-2: #24b8fd;
  --c-accent-2-soft: rgba(36, 184, 253, 0.14);
  --c-warn: #F5A623;
  --c-danger: #EF4560;
  --c-success: #2ED573;

  --shadow-sm: 0 2px 8px rgba(4, 6, 16, 0.35);
  --shadow-md: 0 12px 32px rgba(4, 6, 16, 0.45);
  --shadow-glow: 0 0 0 1px rgba(51, 228, 150, 0.25), 0 8px 30px rgba(51, 228, 150, 0.16);

  /* Typography */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-bn: 'Noto Sans Bengali', 'Inter', sans-serif;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: 3rem;
  --fs-4xl: 4rem;

  /* Spacing scale */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-8: 3rem;
  --sp-10: 4rem;
  --sp-12: 6rem;
  --sp-16: 8rem;

  /* Radius */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-full: 999px;

  /* Layout */
  --container-max: 1240px;
  --header-h: 76px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 160ms;
  --dur-base: 320ms;
  --dur-slow: 640ms;
}

/* Light theme override */
[data-theme="light"] {
  --c-bg: #F6F7FB;
  --c-bg-alt: #FFFFFF;
  --c-surface: #FFFFFF;
  --c-surface-2: #F0F2F8;
  --c-border: #DDE1EE;
  --c-text: #10131F;
  --c-text-muted: #565F7E;
  --c-text-faint: #8790AC;
  --c-accent-soft: rgba(21, 174, 111, 0.10);
  --c-accent-2-soft: rgba(24, 150, 209, 0.10);
  --shadow-sm: 0 2px 8px rgba(20, 24, 45, 0.06);
  --shadow-md: 0 12px 28px rgba(20, 24, 45, 0.10);
  --shadow-glow: 0 0 0 1px rgba(21, 174, 111, 0.20), 0 8px 24px rgba(21, 174, 111, 0.12);
}

/* ===================================================================
   Reset
=================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
:lang(bn) body, [data-lang="bn"] body { font-family: var(--font-bn); }
html[data-current-lang="bn"] body { font-family: var(--font-bn); }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0; letter-spacing: -0.01em; }
html[data-current-lang="bn"] h1, html[data-current-lang="bn"] h2, html[data-current-lang="bn"] h3 { font-family: var(--font-bn); }
p { margin: 0; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; }
img { max-width: 100%; display: block; }
input, select, button { font-family: inherit; font-size: inherit; color: inherit; }

.container { max-width: var(--container-max); margin-inline: auto; padding-inline: var(--sp-5); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--c-accent); color: var(--c-bg);
  padding: var(--sp-2) var(--sp-4); border-radius: var(--r-sm); z-index: 100;
}
.skip-link:focus { left: var(--sp-4); top: var(--sp-4); }

:focus-visible {
  outline: 2px solid var(--c-accent-2);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ===================================================================
   Header
=================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 40;
  height: var(--header-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--c-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner {
  width: 100%; max-width: var(--container-max); margin-inline: auto; padding-inline: var(--sp-5);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
}
.brand { display: flex; align-items: center; gap: var(--sp-3); text-decoration: none; color: var(--c-text); }
.brand-mark { display: flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: var(--fs-md); }
.brand-sub { font-size: var(--fs-xs); color: var(--c-text-faint); }

.header-actions { display: flex; align-items: center; gap: var(--sp-3); }

.lang-switch {
  display: flex; background: var(--c-surface-2); border: 1px solid var(--c-border);
  border-radius: var(--r-full); padding: 3px; gap: 2px;
}
.lang-btn {
  border: 0; background: transparent; color: var(--c-text-muted);
  padding: 6px 12px; border-radius: var(--r-full); cursor: pointer;
  font-size: var(--fs-xs); font-weight: 600; transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.lang-btn.is-active { background: var(--c-accent); color: #04150D; }

.theme-toggle {
  width: 38px; height: 38px; border-radius: var(--r-full);
  border: 1px solid var(--c-border); background: var(--c-surface-2); color: var(--c-text-muted);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.theme-toggle:hover { color: var(--c-accent-2); border-color: var(--c-accent-2); }
.icon-sun { display: none; }
[data-theme="light"] .icon-sun { display: block; }
[data-theme="light"] .icon-moon { display: none; }

/* ===================================================================
   Hero / intro
=================================================================== */
.tool-intro { padding: var(--sp-10) 0 var(--sp-6); text-align: center; }
.eyebrow {
  font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--c-accent); margin-bottom: var(--sp-3);
}
.tool-intro h1 { font-size: clamp(1.75rem, 4vw, var(--fs-3xl)); margin-bottom: var(--sp-3); }
.intro-sub { color: var(--c-text-muted); font-size: var(--fs-md); max-width: 640px; margin-inline: auto; }

/* ===================================================================
   Shared card / button / field primitives
=================================================================== */
.card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); box-shadow: var(--shadow-sm);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  border: 1px solid transparent; border-radius: var(--r-md);
  padding: 12px 22px; font-weight: 600; font-size: var(--fs-sm);
  cursor: pointer; transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--c-accent); color: #04150D; }
.btn-primary:hover:not(:disabled) { box-shadow: var(--shadow-glow); }

.btn-secondary { background: var(--c-accent-2-soft); color: var(--c-accent-2); border-color: color-mix(in srgb, var(--c-accent-2) 40%, transparent); }
.btn-secondary:hover:not(:disabled) { background: var(--c-accent-2); color: #041826; }

.btn-ghost { background: transparent; color: var(--c-text-muted); border-color: var(--c-border); }
.btn-ghost:hover:not(:disabled) { color: var(--c-danger); border-color: var(--c-danger); }

.btn-sm { padding: 8px 14px; font-size: var(--fs-xs); }
.btn-lg { padding: 15px 32px; font-size: var(--fs-base); }

.field { display: flex; flex-direction: column; gap: var(--sp-2); }
.field label, .field-label { font-size: var(--fs-sm); font-weight: 600; color: var(--c-text-muted); }

input[type="number"], input[type="text"], select {
  background: var(--c-surface-2); border: 1px solid var(--c-border); color: var(--c-text);
  border-radius: var(--r-sm); padding: 11px 14px; width: 100%;
  transition: border-color var(--dur-fast) var(--ease-out);
}
input[type="number"]:focus, select:focus { border-color: var(--c-accent-2); }

.input-suffix { position: relative; display: flex; align-items: center; }
.input-suffix input { padding-right: 40px; }
.input-suffix span { position: absolute; right: 14px; font-size: var(--fs-xs); color: var(--c-text-faint); pointer-events: none; }

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%239AA3BD'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 32px;
}

.checkbox-row { display: flex; align-items: center; gap: var(--sp-2); font-size: var(--fs-sm); color: var(--c-text-muted); cursor: pointer; margin: var(--sp-4) 0; }
.checkbox-row input { width: 17px; height: 17px; accent-color: var(--c-accent); cursor: pointer; }

/* ===================================================================
   Dropzone
=================================================================== */
.tool-panel { display: flex; flex-direction: column; gap: var(--sp-6); padding-bottom: var(--sp-12); }

.dropzone {
  padding: var(--sp-10) var(--sp-5);
  border: 2px dashed var(--c-border);
  cursor: pointer; text-align: center;
  transition: border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--c-accent-2); }
.dropzone.is-dragover { border-color: var(--c-accent); background: var(--c-accent-soft); }

.dropzone-inner { display: flex; flex-direction: column; align-items: center; gap: var(--sp-3); max-width: 420px; margin-inline: auto; }
.drop-icon { color: var(--c-accent-2); }
.dropzone h2 { font-size: var(--fs-lg); }
#dropHint { color: var(--c-text-faint); font-size: var(--fs-sm); }
.drop-note { color: var(--c-text-faint); font-size: var(--fs-xs); margin-top: var(--sp-2); }

/* ===================================================================
   File / results grids
=================================================================== */
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--sp-4); gap: var(--sp-3); flex-wrap: wrap; }
.section-head h2 { font-size: var(--fs-lg); }

.file-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--sp-4);
}

.file-card {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--r-md);
  overflow: hidden; position: relative; display: flex; flex-direction: column;
  animation: card-in var(--dur-base) var(--ease-out);
}
@keyframes card-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.file-thumb {
  aspect-ratio: 4 / 3; background: var(--c-surface-2); position: relative; overflow: hidden;
}
.file-thumb img { width: 100%; height: 100%; object-fit: cover; }

.dim-badge {
  position: absolute; left: var(--sp-2); bottom: var(--sp-2);
  background: rgba(10, 14, 26, 0.72); color: #fff; font-family: var(--font-mono);
  font-size: 10px; padding: 3px 7px; border-radius: var(--r-sm);
  display: flex; align-items: center; gap: 5px; backdrop-filter: blur(3px);
}
.dim-badge .arrow { color: var(--c-accent); }

.file-remove {
  position: absolute; top: var(--sp-2); right: var(--sp-2);
  width: 26px; height: 26px; border-radius: var(--r-full); border: none;
  background: rgba(10, 14, 26, 0.72); color: #fff; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--dur-fast) var(--ease-out);
}
.file-remove:hover { background: var(--c-danger); }

.file-meta { padding: var(--sp-3) var(--sp-3) var(--sp-4); display: flex; flex-direction: column; gap: 4px; }
.file-name { font-size: var(--fs-sm); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-sub { font-size: var(--fs-xs); color: var(--c-text-faint); font-family: var(--font-mono); }

.file-actions { padding: 0 var(--sp-3) var(--sp-3); display: flex; gap: var(--sp-2); }
.file-actions .btn { flex: 1; }

/* ===================================================================
   Options card
=================================================================== */
.options-card { padding: var(--sp-6); display: flex; flex-direction: column; }
.options-card h2 { font-size: var(--fs-lg); margin-bottom: var(--sp-5); }

.options-grid { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: var(--sp-3); }

.lock-btn {
  width: 42px; height: 42px; border-radius: var(--r-sm); border: 1px solid var(--c-border);
  background: var(--c-surface-2); color: var(--c-text-muted); cursor: pointer;
  display: flex; align-items: center; justify-content: center; margin-bottom: 1px;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.lock-btn[aria-pressed="true"] { color: var(--c-accent); border-color: color-mix(in srgb, var(--c-accent) 45%, transparent); }

.field-label { display: block; margin-bottom: var(--sp-2); }
.chip-row { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.chip {
  border: 1px solid var(--c-border); background: var(--c-surface-2); color: var(--c-text-muted);
  padding: 8px 16px; border-radius: var(--r-full); font-size: var(--fs-sm); font-weight: 600; cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.chip.is-active { background: var(--c-accent); color: #04150D; border-color: var(--c-accent); }

.options-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); margin-top: var(--sp-5); }
.quality-row { display: flex; align-items: center; gap: var(--sp-3); }
.quality-row input[type="range"] { flex: 1; accent-color: var(--c-accent); }
.quality-row output { font-family: var(--font-mono); font-size: var(--fs-sm); color: var(--c-text-muted); min-width: 40px; text-align: right; }
#qualityField[hidden] { display: none; }

.process-row { margin-top: var(--sp-6); display: flex; align-items: center; gap: var(--sp-5); flex-wrap: wrap; }

.progress-wrap { display: flex; align-items: center; gap: var(--sp-3); flex: 1; min-width: 160px; }
.progress-track { flex: 1; height: 8px; border-radius: var(--r-full); background: var(--c-surface-2); overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--c-accent), var(--c-accent-2)); transition: width var(--dur-fast) var(--ease-out); border-radius: var(--r-full); }
.progress-label { font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--c-text-faint); min-width: 34px; }

/* ===================================================================
   History
=================================================================== */
.history-list { display: flex; flex-direction: column; gap: var(--sp-3); }
.history-item {
  display: flex; align-items: center; gap: var(--sp-4);
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--r-md);
  padding: var(--sp-3); flex-wrap: wrap;
}
.history-thumb { width: 56px; height: 56px; border-radius: var(--r-sm); overflow: hidden; background: var(--c-surface-2); flex-shrink: 0; }
.history-thumb img { width: 100%; height: 100%; object-fit: cover; }
.history-info { flex: 1; min-width: 160px; display: flex; flex-direction: column; gap: 2px; }
.history-name { font-size: var(--fs-sm); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 320px; }
.history-sub { font-size: var(--fs-xs); color: var(--c-text-faint); font-family: var(--font-mono); }
.history-date { font-size: var(--fs-xs); color: var(--c-text-faint); }
.history-actions { display: flex; gap: var(--sp-2); }
.icon-btn {
  width: 34px; height: 34px; border-radius: var(--r-sm); border: 1px solid var(--c-border);
  background: var(--c-surface-2); color: var(--c-text-muted); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { color: var(--c-accent-2); border-color: var(--c-accent-2); }
.icon-btn.danger:hover { color: var(--c-danger); border-color: var(--c-danger); }

/* ===================================================================
   Trust strip / footer
=================================================================== */
.trust-strip {
  display: flex; justify-content: center; gap: var(--sp-8); flex-wrap: wrap;
  padding: var(--sp-6) 0 var(--sp-10); border-top: 1px solid var(--c-border);
}
.trust-item { display: flex; align-items: center; gap: var(--sp-2); color: var(--c-text-muted); font-size: var(--fs-sm); }
.trust-item svg { color: var(--c-accent); flex-shrink: 0; }

.site-footer { border-top: 1px solid var(--c-border); padding: var(--sp-6) 0; }
.footer-inner { color: var(--c-text-faint); font-size: var(--fs-xs); text-align: center; }

/* ===================================================================
   Empty state
=================================================================== */
.empty-note { color: var(--c-text-faint); font-size: var(--fs-sm); padding: var(--sp-5); text-align: center; }

/* ===================================================================
   Toast
=================================================================== */
.toast {
  position: fixed; left: 50%; bottom: var(--sp-6); transform: translate(-50%, 12px);
  background: var(--c-surface-2); border: 1px solid var(--c-border); color: var(--c-text);
  padding: 12px 20px; border-radius: var(--r-md); box-shadow: var(--shadow-md);
  font-size: var(--fs-sm); opacity: 0; pointer-events: none; z-index: 60;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ===================================================================
   Responsive
=================================================================== */
@media (max-width: 720px) {
  .header-inner { padding-inline: var(--sp-4); }
  .brand-sub { display: none; }
  .tool-panel { padding-inline: 0; }
  .options-grid { grid-template-columns: 1fr; }
  .lock-btn { justify-self: center; margin-top: 20px;}
  .options-grid-2 { grid-template-columns: 1fr; }
  .process-row { flex-direction: column; align-items: stretch; }
  .trust-strip { gap: var(--sp-5); }
  .history-item { padding: var(--sp-3); }
  .history-name { max-width: 180px; }
}

@media (max-width: 420px) {
  .file-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}