/* ==========================================================================
   EveryTool Design System
   Shared tokens, layout primitives, and components used across every tool.
   ========================================================================== */

/* Smooth cross-fade between full page navigations, in browsers that support it. */
@view-transition {
  navigation: auto;
}

::view-transition-old(root) {
  animation: view-out 180ms var(--ease) both;
}
::view-transition-new(root) {
  animation: view-in 220ms var(--ease) both;
}
@keyframes view-out {
  to { opacity: 0; transform: translateY(-4px) scale(0.996); }
}
@keyframes view-in {
  from { opacity: 0; transform: translateY(6px) scale(1.002); }
}

:root {
  color-scheme: light;

  /* Brand: fully monochrome, no hue */
  --accent: #262626;
  --accent-hover: #000000;
  --accent-soft: #f0f0f0;

  --glow-opacity: 0.05;

  /* Monochrome light-beam, for the hero: brightens on dark, softly shadows on light */
  --beam: color-mix(in srgb, var(--text) 45%, transparent);

  /* Inverse pair: the "always-contrast" pill button (white-on-black in dark, black-on-white in light) */
  --inverse-bg: var(--text);
  --inverse-text: var(--bg);

  /* Surfaces */
  --bg: #ffffff;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f4f4f8;
  --border: #e6e6ee;
  --border-strong: #d4d4e0;

  /* Glass: translucent surface + backdrop blur, used for cards/panels/header */
  --glass-bg: color-mix(in srgb, var(--surface) 72%, transparent);
  --glass-bg-strong: color-mix(in srgb, var(--surface) 86%, transparent);
  --glass-border: var(--border);
  --glass-blur: blur(18px) saturate(1.4);

  /* Text */
  --text: #16161f;
  --text-muted: #5c5c6e;
  --text-faint: #8b8b9a;

  /* Status */
  --success: #16a34a;
  --success-soft: #ecfdf3;
  --warning: #d97706;
  --warning-soft: #fffbeb;
  --danger: #dc2626;
  --danger-soft: #fef2f2;

  /* Shape: squared-off, minimal rounding */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-full: 999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(16, 16, 32, 0.06);
  --shadow-md: 0 4px 16px rgba(16, 16, 32, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 16, 32, 0.12);

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --speed-fast: 120ms;
  --speed-med: 200ms;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #09090b;
    --bg-elevated: #111113;
    --surface: #131316;
    --surface-hover: #1a1a1e;
    --border: #232327;
    --border-strong: #333338;

    --text: #f5f5f5;
    --text-muted: #9c9ca3;
    --text-faint: #656569;

    --accent: #e5e5e5;
    --accent-hover: #ffffff;
    --accent-soft: #1e1e22;
    --glow-opacity: 0.08;

    --success-soft: #0d2318;
    --warning-soft: #26190a;
    --danger-soft: #2a1112;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #09090b;
  --bg-elevated: #111113;
  --surface: #131316;
  --surface-hover: #1a1a1e;
  --border: #232327;
  --border-strong: #333338;

  --text: #f5f5f5;
  --text-muted: #9c9ca3;
  --text-faint: #656569;

  --accent: #e5e5e5;
  --accent-hover: #ffffff;
  --accent-soft: #1e1e22;
  --glow-opacity: 0.08;

  --success-soft: #0d2318;
  --warning-soft: #26190a;
  --danger-soft: #2a1112;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
}

/* ---------- Reset ---------- */

*, *::before, *::after { box-sizing: border-box; }
html {
  height: 100%;
  scroll-behavior: smooth;
}
body {
  position: relative;
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  animation: page-in 420ms var(--ease) both;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body { animation: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
img, svg, video, canvas { max-width: 100%; display: block; }
a { color: var(--text-muted); text-decoration: none; transition: color var(--speed-fast) var(--ease); }
a:hover { color: var(--text); text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0 0 0.5em; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0 0 1em; color: var(--text-muted); }
code, pre { font-family: var(--font-mono); }
::selection { background: var(--accent-soft); color: var(--text); }

@keyframes page-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes glow-drift {
  0%, 100% { transform: translateX(-50%) translateY(0) rotate(0deg); }
  50% { transform: translateX(-50%) translateY(-16px) rotate(6deg); }
}
@keyframes spin-slow {
  to { transform: rotate(360deg); }
}

/* Elements fade up into place as they enter the viewport (see app.js observeReveal) */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 560ms var(--ease), transform 560ms var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Layout ---------- */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow { max-width: 840px; }
.container--wide { max-width: 1440px; }

.grid {
  display: grid;
  gap: 20px;
}
.grid--cards {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; align-items: center; gap: 12px; }
.row--wrap { flex-wrap: wrap; }
.row--between { justify-content: space-between; }
.spacer { flex: 1; }

/* ---------- Top nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg-elevated) 68%, transparent);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 56px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 650;
  font-size: 15px;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--inverse-bg);
  display: grid;
  place-items: center;
  color: var(--inverse-text);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12) inset, var(--shadow-sm);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}
.main-nav a {
  color: var(--text-muted);
  font-size: 13.5px;
  font-weight: 550;
  padding: 6px 11px;
  border-radius: var(--radius-sm);
  transition: background var(--speed-fast) var(--ease), color var(--speed-fast) var(--ease);
}
.main-nav a:hover {
  background: var(--surface-hover);
  color: var(--text);
  text-decoration: none;
}
.main-nav a.active { color: var(--text); background: var(--surface-hover); }

.theme-toggle {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease), box-shadow var(--speed-med) var(--ease), transform var(--speed-fast) var(--ease);
}
.theme-toggle:hover {
  background: var(--surface-hover);
  border-color: var(--border-strong);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--text) 8%, transparent);
}
.theme-toggle:active { transform: scale(0.92); }
.theme-toggle svg { transition: transform 420ms var(--ease); }
.theme-toggle:hover svg { transform: rotate(35deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 110px 0 96px;
  text-align: left;
  overflow: hidden;
}
/* Soft top vignette, monochrome, echoing the reference's moody hero glow */
.hero::before {
  content: "";
  position: absolute;
  top: -260px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 460px;
  background: radial-gradient(circle, var(--beam) 0%, transparent 62%);
  opacity: var(--glow-opacity);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}
/* Diagonal light beam sweeping the lower hero, the signature "Resend" touch */
.hero::after {
  content: "";
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: -6%;
  height: 220px;
  background: linear-gradient(100deg, transparent 20%, var(--beam) 48%, transparent 76%);
  opacity: 0.22;
  filter: blur(28px);
  transform: rotate(-3deg);
  pointer-events: none;
  z-index: 0;
}
.hero > * { position: relative; z-index: 1; }

.eyebrow-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-strong);
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 28px;
  transition: border-color var(--speed-fast) var(--ease), transform var(--speed-fast) var(--ease);
}
.eyebrow-badge:hover { border-color: var(--border-strong); transform: translateY(-1px); text-decoration: none; }

.hero h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.04;
  margin-bottom: 20px;
  letter-spacing: -0.015em;
}
.hero h1 .fade-line {
  display: block;
  background: linear-gradient(90deg, var(--text) 55%, transparent 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  font-size: 17px;
  max-width: 520px;
  margin: 0 auto 32px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-bottom: 56px;
}
.search-box {
  max-width: 560px;
  margin: 0 auto;
  position: relative;
}
.search-box::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-md) + 2px);
  background: var(--beam);
  opacity: 0;
  filter: blur(10px);
  transition: opacity var(--speed-med) var(--ease);
  z-index: -1;
}
.search-box:focus-within::before { opacity: 0.3; }
.search-box input[type="search"] {
  width: 100%;
  padding: 14px 18px 14px 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  font-size: 15px;
  outline: none;
  transition: border-color var(--speed-fast) var(--ease), box-shadow var(--speed-fast) var(--ease);
}
.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.search-box__icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
}

/* ---------- Cards ---------- */

.card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--speed-med) var(--ease), border-color var(--speed-med) var(--ease), transform var(--speed-med) var(--ease), background var(--speed-med) var(--ease);
}
.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
a.card {
  color: var(--text);
  display: block;
}
a.card:hover { text-decoration: none; transform: translateY(-2px); }

.tool-card__icon {
  width: 38px;
  height: 34px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  font-size: 15px;
  margin-bottom: 16px;
  transition: background var(--speed-med) var(--ease), color var(--speed-med) var(--ease), border-color var(--speed-med) var(--ease);
}
a.card:hover .tool-card__icon {
  background: var(--inverse-bg);
  border-color: var(--inverse-bg);
  color: var(--inverse-text);
}
.tool-card h3 { font-size: 16px; margin-bottom: 4px; }
.tool-card p { font-size: 13.5px; margin: 0; }

.section-label {
  font-size: 12.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 16px;
}

/* ---------- Tool page shell ---------- */

.tool-page {
  padding: 40px 0 80px;
  animation: fade-up 480ms var(--ease) both;
}
.tool-header { margin-bottom: 28px; }
.tool-header__eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
  margin-bottom: 8px;
  display: block;
}
.tool-panel {
  position: relative;
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--speed-med) var(--ease), border-color var(--speed-med) var(--ease);
}
.tool-panel:focus-within {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

/* ---------- Forms ---------- */

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}
input[type="text"], input[type="url"], input[type="email"], input[type="number"],
input[type="password"], input[type="search"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  outline: none;
  transition: border-color var(--speed-fast) var(--ease), box-shadow var(--speed-fast) var(--ease);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { resize: vertical; min-height: 120px; }
.field { margin-bottom: 18px; }
.field__hint { font-size: 12.5px; color: var(--text-faint); margin-top: 6px; }

.code-area {
  font-family: var(--font-mono);
  font-size: 13.5px;
  tab-size: 2;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.005em;
  cursor: pointer;
  transition: background var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease), color var(--speed-fast) var(--ease), transform var(--speed-fast) var(--ease), box-shadow var(--speed-med) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: scale(0.96); }
.btn-primary {
  background: var(--inverse-bg);
  color: var(--inverse-text);
  box-shadow: 0 1px 2px rgba(16, 16, 32, 0.1);
}
.btn-primary:hover {
  box-shadow: 0 0 0 1px var(--inverse-bg), 0 8px 24px -6px color-mix(in srgb, var(--text) 35%, transparent);
  text-decoration: none;
}
.btn-secondary {
  position: relative;
  background: var(--glass-bg-strong);
  border-color: var(--border-strong);
  color: var(--text);
  overflow: hidden;
}
.btn-secondary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(120deg, transparent, color-mix(in srgb, var(--text) 22%, transparent), transparent);
  transform: skewX(-20deg);
  transition: left 550ms var(--ease);
  pointer-events: none;
}
.btn-secondary:hover { background: var(--surface-hover); border-color: var(--text-faint); text-decoration: none; }
.btn-secondary:hover::after { left: 130%; }
.btn-ghost { background: transparent; color: var(--text-muted); border-radius: 14px; }
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); text-decoration: none; }
.btn-danger { background: var(--danger-soft); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: white; text-decoration: none; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Badges / chips ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 650;
  background: var(--surface-hover);
  color: var(--text-muted);
}
.badge--success { background: var(--success-soft); color: var(--success); }
.badge--warning { background: var(--warning-soft); color: var(--warning); }
.badge--danger { background: var(--danger-soft); color: var(--danger); }
.badge--accent { background: var(--accent-soft); color: var(--accent); }

/* ---------- Alerts / toast ---------- */

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-hover);
  font-size: 13.5px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.alert--success { background: var(--success-soft); border-color: color-mix(in srgb, var(--success) 30%, transparent); color: var(--success); }
.alert--warning { background: var(--warning-soft); border-color: color-mix(in srgb, var(--warning) 30%, transparent); color: var(--warning); }
.alert--danger { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 30%, transparent); color: var(--danger); }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 550;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--speed-med) var(--ease), transform var(--speed-med) var(--ease);
  z-index: 100;
}
.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- Output blocks ---------- */

.output-block {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow: auto;
  max-height: 480px;
}
.output-block pre { margin: 0; white-space: pre-wrap; word-break: break-word; }
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 64px;
}
.site-footer p { font-size: 13px; margin: 0; color: var(--text-faint); }

/* ---------- Utilities ---------- */

.text-muted { color: var(--text-muted); }
.text-faint { color: var(--text-faint); }
.text-sm { font-size: 13px; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.hidden { display: none !important; }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid color-mix(in srgb, currentColor 25%, transparent);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.skeleton {
  background: linear-gradient(90deg, var(--surface-hover) 25%, var(--border) 37%, var(--surface-hover) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

/* ---------- Mobile tab bar (iOS-style) ---------- */

.mobile-tabbar {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--bg-elevated) 78%, transparent);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--border);
}
.mobile-tabbar__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 2px;
  border-radius: 12px;
  color: var(--text-faint);
  font-size: 10.5px;
  font-weight: 600;
  transition: color var(--speed-fast) var(--ease), transform var(--speed-fast) var(--ease);
}
.mobile-tabbar__item:hover { text-decoration: none; }
.mobile-tabbar__item:active { transform: scale(0.9); }
.mobile-tabbar__item.active { color: var(--text); }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .main-nav { display: none; }
  .hero { padding: 48px 0 32px; }
}

@media (max-width: 640px) {
  .mobile-tabbar { display: flex; }
  .site-header__inner .btn-ghost[href="/saved/"] { display: none; }
  body { padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px)); }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
}

@media (max-width: 560px) {
  .container { padding: 0 16px; }
  .tool-panel { padding: 18px; }
  .grid--cards { grid-template-columns: 1fr; }
}