/* ============================================================
   imgsin.xyz — design system
   No frameworks, no webfonts. Loads in one small request.
   ============================================================ */

/* Dark is the default theme. Light is opt-in via <html data-theme="light">,
   set by the header toggle and persisted in localStorage. */

:root {
  --bg: #0e0f15;
  --surface: #171822;
  --surface-2: #1e1f2b;
  --text: #ededf4;
  --muted: #a0a0b5;
  --border: #272838;
  --accent: #8a8bfa;
  --accent-strong: #a5a6ff;
  --accent-soft: #232342;
  --good: #4ade80;
  --warn: #fbbf24;
  --gradient: linear-gradient(135deg, #5b5ce2 0%, #8b5cf6 100%);
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -8px rgba(0, 0, 0, .5);
  --shadow-lift: 0 2px 4px rgba(0, 0, 0, .4), 0 16px 36px -10px rgba(0, 0, 0, .6);
  --maxw: 1060px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f7fb;
  --surface: #ffffff;
  --surface-2: #f1f1f7;
  --text: #191922;
  --muted: #5d5d70;
  --border: #e5e5ee;
  --accent: #5b5ce2;
  --accent-strong: #4243c9;
  --accent-soft: #eeedfd;
  --good: #178a50;
  --warn: #b35c00;
  --shadow: 0 1px 2px rgba(20, 20, 43, .05), 0 6px 20px -6px rgba(20, 20, 43, .1);
  --shadow-lift: 0 2px 4px rgba(20, 20, 43, .06), 0 14px 32px -10px rgba(20, 20, 43, .18);
  color-scheme: light;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, canvas, svg, video { max-width: 100%; height: auto; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -.01em; }

h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); margin: .4em 0 .3em; }
h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); margin: 1.8em 0 .5em; }
h3 { font-size: 1.12rem; margin: 1.4em 0 .4em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 60px;
  flex-wrap: wrap;
  padding-top: 6px;
  padding-bottom: 6px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -.02em;
}
.brand:hover { text-decoration: none; }
.brand .logo-mark { width: 28px; height: 28px; flex: none; }
.brand em { font-style: normal; color: var(--accent); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  font-weight: 600;
  font-size: .93rem;
  padding: 7px 11px;
  border-radius: 8px;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.site-nav a.active { color: var(--accent); background: var(--accent-soft); }

/* ---------- hero ---------- */

.hero { padding: 56px 0 34px; text-align: center; }

.hero .eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 99px;
  padding: 5px 14px;
  margin-bottom: 14px;
}

.hero h1 { margin: 0 auto .45rem; max-width: 720px; }
.hero .sub {
  max-width: 620px;
  margin: 0 auto 26px;
  color: var(--muted);
  font-size: 1.12rem;
}
.hero .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  font-size: .98rem;
  padding: 11px 22px;
  border-radius: 11px;
  color: #fff;
  background: var(--gradient);
  box-shadow: var(--shadow);
  transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-lift); filter: brightness(1.05); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

.btn.secondary {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
}
.btn.secondary:hover { background: var(--surface-2); }

.btn.small { padding: 7px 14px; font-size: .88rem; border-radius: 9px; }

/* ---------- tool cards grid ---------- */

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(235px, 1fr));
  gap: 16px;
  margin: 26px 0 10px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease;
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  text-decoration: none;
}

.tool-card .icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 4px;
}
.tool-card .icon svg { width: 22px; height: 22px; }

.tool-card h3 { margin: 0; font-size: 1.04rem; }
.tool-card p { margin: 0; color: var(--muted); font-size: .92rem; }

/* ---------- sections / prose ---------- */

.section { padding: 34px 0; }

.section > h2 { margin-top: 0; }

.prose { max-width: 760px; }
.prose p { color: var(--muted); }
.prose li { margin: .3em 0; }

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.pillar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.pillar .icon { color: var(--accent); margin-bottom: 8px; }
.pillar .icon svg { width: 24px; height: 24px; }
.pillar h3 { margin: 0 0 4px; font-size: 1.02rem; }
.pillar p { margin: 0; color: var(--muted); font-size: .93rem; }

/* ---------- breadcrumbs ---------- */

.crumbs {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: .86rem;
  color: var(--muted);
  padding-top: 22px;
  flex-wrap: wrap;
}
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.crumbs .sep { opacity: .5; }

/* ---------- tool app ---------- */

.tool-shell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  margin: 22px 0;
}

.dropzone {
  border: 2px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: var(--radius);
  background: var(--accent-soft);
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.dropzone:hover, .dropzone.dragover {
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--accent) 12%);
  border-color: var(--accent);
}
.dropzone .dz-icon { color: var(--accent); margin-bottom: 10px; }
.dropzone .dz-icon svg { width: 44px; height: 44px; }
.dropzone .dz-title { font-weight: 700; font-size: 1.06rem; }
.dropzone .dz-hint { color: var(--muted); font-size: .9rem; margin-top: 4px; }
.dropzone input[type="file"] { display: none; }

/* "files ready" state — unmistakable feedback that a file was accepted */
.dropzone.ready {
  border-style: solid;
  border-color: color-mix(in srgb, var(--good) 55%, var(--border));
  background: color-mix(in srgb, var(--good) 7%, var(--surface));
  animation: dzPulse .9s ease .05s 1;
}
.dropzone.ready:hover {
  background: color-mix(in srgb, var(--good) 12%, var(--surface));
  border-color: var(--good);
}
@keyframes dzPulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--good) 45%, transparent); }
  100% { box-shadow: 0 0 0 16px transparent; }
}

.dz-ready { display: flex; align-items: center; gap: 14px; text-align: left; }
.dz-check { color: var(--good); flex: none; }
.dz-check svg {
  width: 34px; height: 34px;
  animation: dzCheck .45s cubic-bezier(.34, 1.56, .64, 1) backwards;
}
@keyframes dzCheck {
  from { transform: scale(0) rotate(-30deg); }
  to { transform: scale(1) rotate(0); }
}

.dz-thumbs { display: flex; align-items: center; gap: 6px; flex: none; }
.dz-thumb {
  width: 58px; height: 58px;
  object-fit: cover;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  animation: dzThumb .3s ease backwards;
}
.dz-thumb:nth-child(2) { animation-delay: .06s; }
.dz-thumb:nth-child(3) { animation-delay: .12s; }
.dz-thumb:nth-child(4) { animation-delay: .18s; }
@keyframes dzThumb {
  from { opacity: 0; transform: scale(.5); }
  to { opacity: 1; transform: scale(1); }
}
.dz-more { font-weight: 700; color: var(--muted); font-size: .85rem; }

.dz-fileinfo { min-width: 0; }
.dz-name {
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.dz-sub { color: var(--muted); font-size: .88rem; margin-top: 2px; }

@media (prefers-reduced-motion: reduce) {
  .dz-check svg, .dz-thumb { animation: none; }
  .dropzone.ready { animation: none; }
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  align-items: flex-end;
  margin: 18px 0;
}

.control { display: flex; flex-direction: column; gap: 6px; }
.control label { font-size: .86rem; font-weight: 700; color: var(--muted); }

select, input[type="number"], input[type="text"] {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 9px 12px;
  min-width: 120px;
}
select:focus, input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }

input[type="range"] { accent-color: var(--accent); width: 200px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; align-items: center; }

.status { color: var(--muted); font-size: .92rem; min-height: 1.4em; }
.status.error { color: var(--warn); font-weight: 600; }
.status.ok { color: var(--good); font-weight: 600; }

/* results */

.result-list { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }

.result-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}
.result-row .r-name {
  font-weight: 600;
  font-size: .93rem;
  word-break: break-all;
  max-width: 100%;
  flex: 1 1 220px;
}
.result-row .r-meta { color: var(--muted); font-size: .86rem; }
.result-row .r-meta .saved { color: var(--good); font-weight: 700; }
.result-row .r-actions { margin-left: auto; display: flex; gap: 8px; }

.preview-frame {
  margin-top: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background:
    repeating-conic-gradient(var(--surface-2) 0% 25%, var(--surface) 0% 50%)
    0 0 / 22px 22px;
  padding: 10px;
  text-align: center;
}
.preview-frame img, .preview-frame canvas { max-width: 100%; border-radius: 4px; }

/* crop workspace */

.crop-stage {
  position: relative;
  margin-top: 14px;
  user-select: none;
  touch-action: none;
  display: flex;
  justify-content: center;
}
.crop-stage canvas { max-width: 100%; height: auto; border-radius: 6px; cursor: crosshair; display: block; }

/* base64 */

textarea.code-out {
  width: 100%;
  min-height: 130px;
  font: 12.5px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  resize: vertical;
  margin-top: 8px;
}

/* steps */

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 18px 0;
  display: grid;
  gap: 14px;
  max-width: 720px;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 16px 18px 16px 62px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
  font-weight: 800;
  display: grid;
  place-items: center;
  font-size: .95rem;
}
.steps li strong { display: block; margin-bottom: 2px; }
.steps li span { color: var(--muted); font-size: .95rem; }

/* FAQ */

.faq { max-width: 760px; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 18px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
.faq details[open] { padding-bottom: 8px; }
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 14px 0;
  list-style: none;
  position: relative;
  padding-right: 30px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--accent);
  font-weight: 400;
}
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 12px; color: var(--muted); }

/* related tools */

.related {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 16px;
}
.related a {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text);
  font-weight: 600;
  font-size: .95rem;
  box-shadow: var(--shadow);
  transition: transform .12s ease, border-color .12s ease;
}
.related a:hover { transform: translateY(-2px); border-color: var(--accent); text-decoration: none; }
.related a span { display: block; color: var(--muted); font-weight: 400; font-size: .85rem; margin-top: 2px; }

/* ---------- footer ---------- */

.site-footer {
  margin-top: 60px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 40px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
}
.footer-grid h4 {
  margin: 0 0 10px;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--muted);
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin: 6px 0; }
.footer-grid a { color: var(--muted); font-size: .93rem; }
.footer-grid a:hover { color: var(--accent); }
.footer-brand p { color: var(--muted); font-size: .92rem; max-width: 300px; margin: 8px 0 0; }
.footer-bottom {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .85rem;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- misc ---------- */

.tag {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  color: var(--good);
  background: color-mix(in srgb, var(--good) 12%, transparent);
  border-radius: 99px;
  padding: 3px 10px;
  vertical-align: middle;
}

.hidden { display: none !important; }

.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;
}

/* comparison tables (guides) */
.table-wrap { overflow-x: auto; margin: 20px 0; }
table.compare {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
  min-width: 480px;
}
.compare th, .compare td {
  text-align: left;
  padding: 11px 14px;
  border: 1px solid var(--border);
  vertical-align: top;
}
.compare th { background: var(--surface-2); white-space: nowrap; }
.compare tbody tr:nth-child(even) td { background: color-mix(in srgb, var(--surface-2) 40%, transparent); }
.compare td:first-child { font-weight: 700; }

/* language switcher (footer) */
.langs { margin-top: 12px; font-size: .9rem; color: var(--muted); }
.langs strong { color: var(--text); }

/* RTL adjustments (Arabic) */
[dir="rtl"] .steps li { padding: 16px 62px 16px 18px; }
[dir="rtl"] .steps li::before { left: auto; right: 16px; }
[dir="rtl"] .faq summary { padding-right: 0; padding-left: 30px; }
[dir="rtl"] .faq summary::after { right: auto; left: 2px; }
[dir="rtl"] .compare th, [dir="rtl"] .compare td { text-align: right; }
[dir="rtl"] .result-row .r-actions { margin-left: 0; margin-right: auto; }

/* ---------- app-feel polish ---------- */

html { -webkit-tap-highlight-color: transparent; }

body {
  overscroll-behavior-y: contain;
  min-height: 100dvh;
}

a, button, [role="button"], input, select, textarea, summary { touch-action: manipulation; }

.btn:active, .tool-card:active, .bn-item:active { transform: scale(.97); }

@media (pointer: coarse) {
  .btn { min-height: 44px; }
  input[type="range"] { height: 30px; }
}

/* theme toggle (header) */
.theme-toggle {
  flex: none;
  margin-left: 2px;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* mobile dropdown menu (hamburger) */
.menu-toggle { display: none; }

@media (max-width: 700px) {
  .menu-toggle {
    display: grid;
    place-items: center;
    margin-left: auto;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    cursor: pointer;
    transition: color .15s ease, border-color .15s ease;
  }
  .menu-toggle:hover, .site-header.open .menu-toggle { color: var(--text); border-color: var(--accent); }
  .menu-toggle svg { width: 20px; height: 20px; }
  .site-nav { display: none; }
  .site-header.open .site-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    position: absolute;
    top: 100%;
    left: 12px;
    right: 12px;
    margin: 0;
    padding: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow-lift);
    z-index: 70;
  }
  .site-header.open .site-nav a { padding: 12px 14px; font-size: 1rem; border-radius: 9px; }
}

/* bottom app bar (mobile only) */
.bottom-nav { display: none; }

@media (max-width: 700px) {
  .bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 60;
    background: color-mix(in srgb, var(--surface) 90%, transparent);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-top: 1px solid var(--border);
    padding: 5px 6px calc(5px + env(safe-area-inset-bottom));
  }
  .bn-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px 2px 4px;
    border-radius: 10px;
    color: var(--muted);
    font-size: 10.5px;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
  }
  .bn-item svg { width: 21px; height: 21px; }
  .bn-item.active { color: var(--accent); background: var(--accent-soft); }
  body { padding-bottom: 74px; }
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .site-header .container { gap: 8px; }
  .hero { padding: 36px 0 22px; }
  .tool-shell { padding: 18px; }
  input[type="range"] { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
}