/* ==========================================================================
   site.css — Vanilla CSS design system (Light theme, tuned for 1280px base)
   ========================================================================== */

/* ----------------------------- Modern Reset ------------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }
* { min-width: 0; }
html:focus-within { scroll-behavior: smooth; }
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd { margin: 0; }
ul[role='list'],ol[role='list'] { list-style: none; margin: 0; padding: 0; }
img,picture,video,canvas,svg { display: block; max-width: 100%; }
input,button,textarea,select { font: inherit; color: inherit; }
button { border: 0; background: none; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }         /* default: no underline */
a:hover { text-decoration: underline; }             /* content links may underline */
code,kbd,pre,samp { font-family: ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace; }

/* ------------------------------- Tokens ---------------------------------- */
:root{
  /* Typography */
  --font-sans: ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji";
  --fs-1: clamp(.83rem,.78rem + .2vw,.9rem);
  --fs-2: clamp(.95rem,.9rem + .3vw,1rem);
  --fs-3: clamp(1.1rem,1rem + .5vw,1.25rem);
  --fs-4: clamp(1.35rem,1.1rem + 1vw,1.6rem);
  --fs-5: clamp(1.7rem,1.3rem + 1.6vw,2.2rem);
  --fs-6: clamp(2.1rem,1.6rem + 2.4vw,3rem);

  /* Spacing */
  --space-1:.25rem; --space-2:.5rem; --space-3:.75rem; --space-4:1rem;
  --space-5:1.5rem; --space-6:2rem; --space-7:3rem; --space-8:4rem;

  /* Radius + shadow */
  --radius-sm: 8px; --radius: 12px; --radius-lg: 20px;
  --shadow-1: 0 1px 2px hsl(0 0% 0% /.08), 0 1px 1px hsl(0 0% 0% /.04);
  --shadow-2: 0 6px 18px hsl(0 0% 0% /.12);

  /* Brand */
  --primary-h: 262; --primary-s: 85%; --primary-l: 56%;
  --primary: hsl(var(--primary-h) var(--primary-s) var(--primary-l));
  --on-primary: #fff;

  --secondary-h: 200; --secondary-s: 85%; --secondary-l: 46%;
  --secondary: hsl(var(--secondary-h) var(--secondary-s) var(--secondary-l));
  --on-secondary: #fff;

  /* Links (pink) */
  --link-h: 330; --link-s: 75%; --link-l: 55%;
  --link: hsl(var(--link-h) var(--link-s) var(--link-l));
  --link-hover: hsl(var(--link-h) var(--link-s) calc(var(--link-l) - 12%));

  /* Neutrals */
  --bg: #fff;
  --surface: hsl(0 0% 98%);
  --surface-2: hsl(0 0% 96%);
  --text: hsl(222 47% 11%);
  --muted: hsl(215 16% 47%);
  --border: hsl(214 32% 91%);

  /* Layout (tuned for 1280px) */
  --container-max: 1200px;
}

/* ------------------------------- Base ------------------------------------ */
html,body{ height:100% }
body{
  font-family: var(--font-sans);
  font-size: var(--fs-2);
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, hsl(0 0% 100% /.6), transparent), var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  accent-color: var(--primary);
}
a{ color: var(--link); }
a:hover{ color: var(--link-hover); }

h1{ font-size: var(--fs-6); line-height:1.1; letter-spacing:-.02em; }
h2{ font-size: var(--fs-5); line-height:1.15; }
h3{ font-size: var(--fs-4); }
h4{ font-size: var(--fs-3); }
h5{ font-size: var(--fs-2); }
h6{ font-size: var(--fs-1); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
hr{ border:0; border-top:1px solid var(--border); margin-block: var(--space-6); }

/* ----------------------------- Utilities --------------------------------- */
.container{ width:min(96vw,var(--container-max)); margin-inline:auto; padding-inline:var(--space-4); }
.section{ padding-block: var(--space-7); }
.surface{ background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); }
.stack > * + *{ margin-top: var(--space-4); }
.flex{ display:flex; gap:var(--space-3); }
.center{ display:grid; place-items:center; }

/* Focus ring (accessibility) */
:where(a,button,input,select,textarea,[tabindex]):focus-visible{
  outline: 2px solid hsl(var(--link-h) var(--link-s) 50% / .55);
  outline-offset: 2px;
  border-radius: calc(var(--radius) / 2);
}

/* Tiny utilities */
.muted { color: var(--muted); }
.hidden { display: none !important; }
.visually-hidden{
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ----------------------------- Components -------------------------------- */
.btn{
  --btn-bg: var(--surface);
  --btn-fg: var(--text);
  --btn-bd: var(--border);
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  height:2.5rem; padding-inline:1rem;
  border-radius: var(--radius);
  background: var(--btn-bg); color: var(--btn-fg); border:1px solid var(--btn-bd);
  box-shadow: var(--shadow-1);
  font-weight:600;
  transition: transform .05s ease, background-color .2s ease, border-color .2s ease;
}
.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0); }
.btn-primary{ --btn-bg: var(--primary); --btn-fg: var(--on-primary); --btn-bd: color-mix(in hsl, var(--primary), black 10%); }
.btn-primary:hover{ background: color-mix(in hsl, var(--primary), black 8%); border-color: color-mix(in hsl, var(--primary), black 18%); }
.btn-secondary{ --btn-bg: var(--secondary); --btn-fg: var(--on-secondary); --btn-bd: color-mix(in hsl, var(--secondary), black 10%); }
.btn-secondary:hover{ background: color-mix(in hsl, var(--secondary), black 8%); border-color: color-mix(in hsl, var(--secondary), black 18%); }
.btn-outline{ background:transparent; border:1px solid var(--border); }
.btn-ghost{ background:transparent; border:none; }
.btn-sm { height: 2rem; padding-inline: .75rem; font-size: .9rem; }
.btn-lg { height: 2.75rem; padding-inline: 1.1rem; font-size: 1rem; }

.btn-danger{
  --btn-bg: hsl(0 75% 50%);
  --btn-fg: #fff;
  --btn-bd: color-mix(in hsl, hsl(0 75% 50%), black 12%);
}
.btn-danger:hover{
  background: color-mix(in hsl, hsl(0 75% 50%), black 10%);
  border-color: color-mix(in hsl, hsl(0 75% 50%), black 20%);
}

/* Special style for nav sign-out */
.btn-signout {
  --btn-bg: hsl(0 72% 55%);
  --btn-fg: #fff;
  --btn-bd: color-mix(in hsl, hsl(0 72% 55%), black 15%);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  height: 2.2rem;
  padding: 0 .9rem;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  box-shadow: var(--shadow-1);
  transition: transform .08s ease, background-color .15s ease, border-color .15s ease;
}
.btn-signout:hover {
  background: color-mix(in hsl, hsl(0 72% 55%), black 10%);
  border-color: color-mix(in hsl, hsl(0 72% 55%), black 20%);
  transform: translateY(-1px);
}
.btn-signout:active { transform: translateY(0); }

/* Card */
.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-2);
}

/* Inputs */
.label { font-weight: 600; font-size: .95rem; }
.input, textarea, select{
  width: 100%;
  padding: .6rem .8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  box-shadow: var(--shadow-1);
}
.input::placeholder, textarea::placeholder{ color: color-mix(in hsl, var(--muted), white 25%); }
.input:disabled, textarea:disabled, select:disabled{
  background: var(--surface-2);
  color: color-mix(in hsl, var(--muted), white 20%);
  cursor: not-allowed;
}
textarea{ resize: vertical; }

/* Alerts */
.alert{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .8rem 1rem;
  background: var(--surface);
  box-shadow: var(--shadow-1);
}
.alert-success{ border-color: hsl(142 40% 80%); background: hsl(142 45% 96%); }
.alert-warning{ border-color: hsl(45 85% 80%);  background: hsl(45 100% 96%); }
.alert-danger{  border-color: hsl(0 75% 80%);   background: hsl(0 85% 96%); }
.alert-info{     border-color: hsl(210 70% 80%); background: hsl(210 85% 96%); }

/* ------------------------------- Navbar ---------------------------------- */
.navbar{
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(6px);
  background: color-mix(in hsl, var(--bg), var(--surface) 40%);
  border-bottom: 1px solid var(--border);
}
.navbar .inner{
  display:flex; align-items:center; justify-content:space-between;
  height:64px; width:min(96vw,var(--container-max)); margin-inline:auto; padding:0 var(--space-4);
}
.nav-brand{ font-weight:800; letter-spacing:-.02em; font-size:1.1rem; }
.nav-links{ display:flex; gap:var(--space-4); align-items:center; }
.nav-links a{
  padding:.45rem .7rem; border-radius:10px; color:var(--text); text-decoration:none;
}
.nav-links a:hover{ background: var(--surface-2); }
.nav-links a.active{
  background: color-mix(in hsl, var(--primary), var(--bg) 85%);
  border: 1px solid color-mix(in hsl, var(--primary), black 25%);
  box-shadow: var(--shadow-1);
  color: var(--primary); font-weight:600;
}

/* Dropdown */
.nav-dropdown{ position:relative; }
.nav-dropdown > summary{
  list-style:none; cursor:pointer; padding:.45rem .7rem; border-radius:10px;
  display:inline-flex; align-items:center; gap:.35rem;
}
.nav-dropdown > summary::-webkit-details-marker{ display:none; }
.nav-dropdown > summary:hover{ background: var(--surface-2); }
.nav-dropdown > summary.active{
  background: color-mix(in hsl, var(--primary), var(--bg) 85%);
  border: 1px solid color-mix(in hsl, var(--primary), black 25%);
  box-shadow: var(--shadow-1);
  color: var(--primary); font-weight:600;
}
.nav-dropdown .chev{ width:14px; height:14px; fill:currentColor; opacity:.7; transition: transform .15s ease; }
.nav-dropdown[open] .chev{ transform: rotate(180deg); }
.nav-dropdown .nav-menu{
  position:absolute; right:0; top:calc(100% + 8px);
  min-width:260px; background:var(--surface);
  border:1px solid var(--border); border-radius:var(--radius);
  box-shadow: var(--shadow-2); padding:.5rem; display:grid; gap:.25rem; z-index:70;
}
.nav-dropdown .nav-menu a{ padding:.5rem .6rem; border-radius:8px; color:var(--text); }
.nav-dropdown .nav-menu a:hover{ background: var(--surface-2); }
.nav-dropdown .nav-menu hr{ border:0; border-top:1px solid var(--border); margin:.35rem 0; }

/* ---------------------------- App Shell Layout --------------------------- */
.app-shell{
  min-height:100svh;
  display:grid;
  grid-template-rows:auto 1fr auto;
  grid-template-columns:1fr;
  grid-template-areas:"header" "content" "footer";
  background:var(--bg);
}
.content{ grid-area:content; }
.footer{
  grid-area:footer;
  margin-top: var(--space-7);
  padding: var(--space-5) 0;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

/* =============================== Apps ==================================== */
.apps{ display:grid; gap: var(--space-6); }
.apps-head{ display:grid; gap: var(--space-3); }
.apps-title{ font-size: var(--fs-5); letter-spacing: -.01em; }
.apps-sub{ color: var(--muted); }

/* Toolbar */
.apps-tools{
  display:flex; align-items:center; gap:var(--space-3);
  margin-top: var(--space-4); margin-bottom: var(--space-6);
  flex-wrap: nowrap;
}
.apps-tools .apps-search{ flex:1 1 480px; min-width:220px; }
.apps-tools .apps-filter{ flex:0 0 220px; min-width:160px; }
@media (max-width:640px){
  .apps-tools{ flex-wrap:wrap; }
  .apps-tools .apps-search,
  .apps-tools .apps-filter,
  .apps-tools .btn{ width:100%; flex:1 0 100%; }
}

/* Grid tuned for 1280px */
.apps-grid{
  display:grid; gap:2rem;
  grid-template-columns: repeat(4, 1fr); /* 1280px base → 4 columns */
}
@media (max-width:1100px){ .apps-grid{ grid-template-columns:repeat(3,1fr);} }
@media (max-width:900px){  .apps-grid{ grid-template-columns:repeat(2,1fr);} }
@media (max-width:600px){  .apps-grid{ grid-template-columns:1fr;} }

/* Cards (bigger + no underline on hover) */
.apps-card{
  display:grid;
  grid-template-rows:auto 1fr;
  gap: var(--space-3);
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  transition: border-color .15s ease, transform .06s ease, box-shadow .15s ease;
  text-decoration: none;
}
.apps-card:hover{
  transform: translateY(-2px);
  border-color: color-mix(in hsl, var(--secondary), black 15%);
  box-shadow: var(--shadow-1);
  text-decoration: none;  /* no underline on card hover */
}

/* headline row */
.apps-headline{
  display:inline-flex; align-items:center; gap: var(--space-3);
  min-height:48px;
}
.apps-icon{
  width:48px; height:48px;
  display:grid; place-items:center;
  background: color-mix(in hsl, var(--primary), white 85%);
  color: color-mix(in hsl, var(--primary), black 10%);
  font-weight:700; font-size:.95rem;
}
.apps-name{
  margin:0; font-size:1.15rem; line-height:1.3; font-weight:700;
  color: var(--primary); transition: color .15s ease;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; /* prevent wrap */
}
.apps-card:hover .apps-name{ color: var(--secondary); }

/* body (tagline + tags) */
.apps-body{ display:grid; gap:.6rem; }
.apps-desc{ margin:0; font-size:.95rem; }
.apps-tags{ display:flex; flex-wrap:wrap; gap:.4rem; }
.apps-tag{
  display:inline-flex; align-items:center; gap:.35rem;
  height:1.6rem; padding:0 .6rem;
  border-radius:999px; border:1px solid var(--border);
  background: var(--surface-2);
  color: color-mix(in hsl, var(--text), white 35%);
  font-size:.75rem; font-weight:700;
}
.apps-tag::before{ content:"•"; font-size:.9em; color: color-mix(in hsl, var(--primary), black 10%); }

/* Smallest screens */
@media (max-width:520px){
  .apps-card{ grid-template-columns:1fr; }
  .apps-icon{ width:48px; height:48px; }
}

/* ======================= Shared helpers for tools ======================== */
.form-row{ display:grid; gap:.5rem; align-items:start; }
.form-row.between{ display:flex; align-items:center; justify-content:space-between; gap:var(--space-3); }
.input,textarea,select{ width:100%; }

/* Base64 helpers */
.mime-wrap{ display:inline-flex; align-items:center; gap:.5rem; }
.mime-badge{
  display:inline-flex; align-items:center; padding:.25rem .6rem;
  border:1px solid color-mix(in hsl, var(--primary), black 18%);
  background: color-mix(in hsl, var(--primary), white 88%);
  color: color-mix(in hsl, var(--primary), black 22%);
  font-weight:700; font-size:.85rem; border-radius:999px;
}
.outputs-grid{ display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap: var(--space-5); }
@media (max-width:900px){ .outputs-grid{ grid-template-columns:1fr; } }

/* URL tools spacing */
.encode-gap{ margin-bottom: var(--space-6); }
.decode-gap{ margin-bottom: var(--space-6); }

/* JWT tool */
.jwt-gap{ margin-bottom: var(--space-6); }
.kv{ display:grid; grid-template-columns:max-content 1fr; gap:.35rem var(--space-4); }
.kv dt{ font-weight:700; color:var(--muted); }
.kv dd{ margin:0; }

/* Markdown editor */
.markdown-editor{
  display:grid; grid-template-columns:1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
}
@media (max-width:900px){ .markdown-editor{ grid-template-columns:1fr; } }
.markdown-editor textarea,
.markdown-editor .preview{
  width:100%; padding:var(--space-4);
  border:1px solid var(--border); border-radius:var(--radius); background:var(--surface);
}
.markdown-editor .preview{ overflow-y:auto; }

/* Markdown preview typography */
.prose{
  line-height: 1.75;
}
.prose h1{ font-size: clamp(1.6rem, 1.1rem + 1.8vw, 2.2rem); margin: 0 0 .6rem; }
.prose h2{ font-size: clamp(1.3rem, 1rem + 1.2vw, 1.7rem);  margin: 1.2rem 0 .4rem; }
.prose h3{ font-size: 1.2rem; margin: 1rem 0 .35rem; }
.prose p{ margin: .5rem 0; }
.prose code{
  padding: .15rem .35rem; border-radius: .35rem;
  background: var(--surface-2); border: 1px solid var(--border);
}
.prose pre{
  padding: .8rem; border-radius: var(--radius);
  background: var(--surface-2); border: 1px solid var(--border);
  overflow: auto;
}
.prose ul, .prose ol{ padding-left: 1.25rem; margin: .4rem 0 .6rem; }
.prose hr{ margin: 1rem 0; }
.prose a{ color: var(--link); }
.prose a:hover{ color: var(--link-hover); text-decoration: underline; }

/* Color converter rows */
.color-kv{
  display:grid; grid-template-columns:110px 1fr auto;
  gap: var(--space-3); align-items:center;
}
.color-kv + .color-kv{ margin-top: var(--space-4); }
.color-kv input{ width:100%; }

/* Inline form (used for Sign out in navbar) */
.inline-form{ display: inline; }

/* ====================== Missing/Helpful Additions ======================= */

/* Focus ring (accessibility) */
:where(a, button, input, select, textarea, [tabindex]):focus-visible{
  outline: 2px solid hsl(var(--link-h) var(--link-s) 50% / .55);
  outline-offset: 2px;
  border-radius: calc(var(--radius) / 2);
}

/* Muted helper */
.muted { color: var(--muted); }

/* Labels + Inputs */
.label { font-weight: 600; font-size: .95rem; }
.input, textarea, select{
  width: 100%;
  padding: .6rem .8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  box-shadow: var(--shadow-1);
}
.input::placeholder, textarea::placeholder{ color: color-mix(in hsl, var(--muted), white 25%); }
.input:disabled, textarea:disabled, select:disabled{
  background: var(--surface-2);
  color: color-mix(in hsl, var(--muted), white 20%);
  cursor: not-allowed;
}
textarea{ resize: vertical; }

/* Buttons: sizes + danger */
.btn-sm { height: 2rem; padding-inline: .75rem; font-size: .9rem; }
.btn-lg { height: 2.75rem; padding-inline: 1.1rem; font-size: 1rem; }
.btn-danger{
  --btn-bg: hsl(0 75% 50%);
  --btn-fg: #fff;
  --btn-bd: color-mix(in hsl, hsl(0 75% 50%), black 12%);
}
.btn-danger:hover{
  background: color-mix(in hsl, hsl(0 75% 50%), black 10%);
  border-color: color-mix(in hsl, hsl(0 75% 50%), black 20%);
}

/* Alerts */
.alert{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .8rem 1rem;
  background: var(--surface);
  box-shadow: var(--shadow-1);
}
.alert-success{ border-color: hsl(142 40% 80%); background: hsl(142 45% 96%); }
.alert-warning{ border-color: hsl(45 85% 80%);  background: hsl(45 100% 96%); }
.alert-danger{  border-color: hsl(0 75% 80%);   background: hsl(0 85% 96%); }
.alert-info{     border-color: hsl(210 70% 80%); background: hsl(210 85% 96%); }

/* Markdown preview typography */
.prose{
  line-height: 1.75;
}
.prose h1{ font-size: clamp(1.6rem, 1.1rem + 1.8vw, 2.2rem); margin: 0 0 .6rem; }
.prose h2{ font-size: clamp(1.3rem, 1rem + 1.2vw, 1.7rem);  margin: 1.2rem 0 .4rem; }
.prose h3{ font-size: 1.2rem; margin: 1rem 0 .35rem; }
.prose p{ margin: .5rem 0; }
.prose code{
  padding: .15rem .35rem; border-radius: .35rem;
  background: var(--surface-2); border: 1px solid var(--border);
}
.prose pre{
  padding: .8rem; border-radius: var(--radius);
  background: var(--surface-2); border: 1px solid var(--border);
  overflow: auto;
}
.prose ul, .prose ol{ padding-left: 1.25rem; margin: .4rem 0 .6rem; }
.prose hr{ margin: 1rem 0; }
.prose a{ color: var(--link); }
.prose a:hover{ color: var(--link-hover); text-decoration: underline; }

/* Inline form (used for Sign out in navbar) */
.inline-form{ display: inline; }

/* Tiny utilities */
.hidden { display: none !important; }
.visually-hidden{
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}


/* Special style for nav sign-out */
.btn-signout {
  --btn-bg: hsl(0 72% 55%); /* red tone */
  --btn-fg: #fff;
  --btn-bd: color-mix(in hsl, hsl(0 72% 55%), black 15%);
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  height: 2.2rem;
  padding: 0 .9rem;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
  box-shadow: var(--shadow-1);
  transition: transform .08s ease, background-color .15s ease, border-color .15s ease;
}

.btn-signout:hover {
  background: color-mix(in hsl, hsl(0 72% 55%), black 10%);
  border-color: color-mix(in hsl, hsl(0 72% 55%), black 20%);
  transform: translateY(-1px);
}

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