/* =========================================================
   s993.com — Shared site styles
   Design: indigo #3B5BDB + coral #FF6B6B
   Fonts: Space Grotesk (headings) + Inter (body)
   ========================================================= */

:root {
  --c-primary: #3B5BDB;
  --c-primary-dark: #2B47B8;
  --c-primary-soft: #EBF0FE;
  --c-accent: #FF6B6B;
  --c-accent-dark: #F05252;
  --c-bg: #F8F9FC;
  --c-surface: #FFFFFF;
  --c-text: #2D3748;
  --c-text-soft: #6B7280;
  --c-border: #E5E8F0;
  --c-success: #10B981;
  --c-danger: #EF4444;
  --c-footer: #1E2740;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(45, 55, 72, .08);
  --shadow: 0 6px 24px rgba(45, 55, 72, .10);
  --shadow-lg: 0 18px 48px rgba(45, 55, 72, .14);
  --maxw: 1100px;
  --nav-h: 66px;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.2; color: #1A2238; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Navbar ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-head); font-weight: 700; font-size: 20px; color: #1A2238; }
.nav-brand .logo-mark { width: 32px; height: 32px; flex-shrink: 0; }
.nav-brand .dot-com, .footer-brand .dot-com { color: var(--c-accent); }
.nav-right { display: flex; align-items: center; gap: 22px; }

.nav-tools { position: relative; }
.nav-tools-btn {
  display: flex; align-items: center; gap: 6px;
  font-weight: 600; font-size: 15px; color: var(--c-text);
  padding: 8px 12px; border-radius: var(--radius-sm);
  transition: background .2s, color .2s;
}
.nav-tools-btn:hover { background: var(--c-primary-soft); color: var(--c-primary); }
.nav-tools-btn .caret { transition: transform .2s; }
.nav-tools.open .caret { transform: rotate(180deg); }
.nav-menu {
  position: absolute; top: calc(100% + 8px); right: 0;
  width: 300px; background: #fff;
  border: 1px solid var(--c-border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
  transition: all .2s;
}
.nav-tools.open .nav-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-menu a {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--c-text); transition: background .15s;
}
.nav-menu a:hover { background: var(--c-bg); }
.nav-menu a.active { background: var(--c-primary-soft); color: var(--c-primary); font-weight: 600; }
.nav-menu .ic { width: 28px; height: 28px; border-radius: 7px; display: grid; place-items: center; background: var(--c-primary-soft); color: var(--c-primary); flex-shrink: 0; }
.nav-menu .ic svg { width: 16px; height: 16px; }

.lang-switch { display: flex; align-items: center; gap: 2px; background: var(--c-bg); border-radius: 999px; padding: 3px; }
.lang-switch a { padding: 5px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--c-text-soft); transition: all .2s; }
.lang-switch a.active { background: var(--c-primary); color: #fff; }

.nav-toggle { display: none; width: 40px; height: 40px; border-radius: var(--radius-sm); align-items: center; justify-content: center; }
.nav-toggle svg { width: 24px; height: 24px; }

/* ---------- Main ---------- */
main { flex: 1; }

.hero { padding: 56px 0 28px; text-align: center; }
.hero h1 { font-size: clamp(30px, 4.6vw, 46px); letter-spacing: -.5px; }
.hero p { margin: 16px auto 0; max-width: 640px; font-size: 18px; color: var(--c-text-soft); }
.badge-local {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 18px; padding: 7px 16px; border-radius: 999px;
  background: rgba(16, 185, 129, .12); color: var(--c-success);
  font-size: 13px; font-weight: 600;
}
.badge-local .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c-success); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }

/* ---------- Tool card ---------- */
.tool-card {
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: 20px; box-shadow: var(--shadow);
  padding: 28px; margin: 0 auto; max-width: 880px;
}

/* ---------- Dropzone ---------- */
.dropzone {
  border: 2px dashed #C9D2EE; border-radius: var(--radius);
  background: linear-gradient(180deg, #FAFBFF 0%, var(--c-primary-soft) 100%);
  padding: 48px 24px; text-align: center; cursor: pointer;
  transition: border-color .25s, background .25s, transform .15s;
}
.dropzone:hover { border-color: var(--c-primary); transform: translateY(-1px); }
.dropzone.drag { border-color: var(--c-accent); background: #FFF3F3; border-style: solid; }
.dz-icon {
  width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 18px; display: grid; place-items: center;
  background: var(--c-primary); color: #fff; box-shadow: 0 10px 24px rgba(59, 91, 219, .35);
}
.dz-icon svg { width: 30px; height: 30px; }
.dz-title { font-family: var(--font-head); font-weight: 700; font-size: 20px; color: #1A2238; }
.dz-hint { margin-top: 6px; font-size: 14px; color: var(--c-text-soft); }
.dz-btn {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 22px; padding: 13px 28px; border-radius: var(--radius-sm);
  background: var(--c-accent); color: #fff; font-weight: 700; font-size: 15px;
  box-shadow: 0 8px 20px rgba(255, 107, 107, .35);
  transition: transform .15s, background .2s;
}
.dz-btn:hover { background: var(--c-accent-dark); transform: translateY(-2px); }
.dz-btn svg { width: 18px; height: 18px; }

/* ---------- Options bar ---------- */
.options {
  display: flex; align-items: center; flex-wrap: wrap; gap: 18px;
  margin-top: 22px; padding: 16px 20px; background: var(--c-bg);
  border-radius: var(--radius); border: 1px solid var(--c-border);
}
.opt-group { display: flex; align-items: center; gap: 10px; }
.opt-group label { font-size: 14px; font-weight: 600; color: var(--c-text); white-space: nowrap; }
.opt-group select {
  padding: 8px 32px 8px 12px; border-radius: var(--radius-sm);
  border: 1px solid var(--c-border); background: #fff; font-size: 14px; color: var(--c-text);
  cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}

/* ---------- File list ---------- */
.file-list { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.file-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius); animation: fadeIn .3s ease;
  transition: box-shadow .2s, border-color .2s;
}
.file-item:hover { box-shadow: var(--shadow-sm); border-color: #D4DBF0; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.file-ic { width: 40px; height: 40px; border-radius: 9px; display: grid; place-items: center; background: var(--c-primary-soft); color: var(--c-primary); flex-shrink: 0; }
.file-ic svg { width: 20px; height: 20px; }
.file-main { flex: 1; min-width: 0; }
.file-name { font-weight: 600; font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { font-size: 12px; color: var(--c-text-soft); margin-top: 2px; }
.file-progress { height: 5px; border-radius: 999px; background: var(--c-primary-soft); margin-top: 8px; overflow: hidden; }
.file-progress > span { display: block; height: 100%; width: 0; background: var(--c-primary); border-radius: 999px; transition: width .2s; }
.file-item.done .file-progress > span { width: 100%; background: var(--c-success); }
.file-item.error .file-progress > span { width: 100%; background: var(--c-danger); }
.file-status { font-size: 12px; font-weight: 600; color: var(--c-text-soft); white-space: nowrap; }
.file-item.processing .file-status { color: var(--c-primary); }
.file-item.done .file-status { color: var(--c-success); }
.file-item.error .file-status { color: var(--c-danger); }
.file-actions { display: flex; gap: 6px; flex-shrink: 0; }
.file-actions button {
  width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center;
  background: var(--c-bg); color: var(--c-text-soft); transition: all .2s;
}
.file-actions button:hover { background: var(--c-primary-soft); color: var(--c-primary); }
.file-actions .btn-dl:hover { background: rgba(16,185,129,.12); color: var(--c-success); }
.file-actions .btn-rm:hover { background: rgba(239,68,68,.12); color: var(--c-danger); }
.file-actions svg { width: 17px; height: 17px; }

/* ---------- Action bar ---------- */
.action-bar { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: var(--radius); font-weight: 700; font-size: 15px;
  transition: transform .15s, box-shadow .2s, background .2s;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--c-accent); color: #fff; box-shadow: 0 10px 24px rgba(255, 107, 107, .35); }
.btn-primary:hover { background: var(--c-accent-dark); transform: translateY(-2px); }
.btn-primary:disabled { background: #C9CFDB; color: #fff; box-shadow: none; cursor: not-allowed; transform: none; }
.btn-ghost { background: #fff; color: var(--c-primary); border: 1.5px solid var(--c-primary); }
.btn-ghost:hover { background: var(--c-primary-soft); }
.btn-ghost:disabled { color: #B7BCCA; border-color: #D4DBF0; background: #fff; cursor: not-allowed; }

/* ---------- Info section ---------- */
.info { margin: 72px auto 0; max-width: var(--maxw); padding: 0 24px; }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.info h2 { font-size: 26px; margin-bottom: 14px; }
.info p { color: var(--c-text-soft); margin-bottom: 14px; }
.info ul { padding-left: 20px; color: var(--c-text-soft); }
.info li { margin-bottom: 8px; }

.compare-card { background: var(--c-footer); color: #fff; border-radius: 18px; padding: 28px; box-shadow: var(--shadow); }
.compare-card h3 { color: #fff; font-size: 18px; margin-bottom: 16px; }
.compare-card table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-card th, .compare-card td { text-align: left; padding: 11px 8px; border-bottom: 1px solid rgba(255,255,255,.12); }
.compare-card th { color: #9DB0E0; font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .5px; }
.compare-card td { color: #D7DEF0; }
.compare-card td:first-child { font-weight: 600; color: #fff; }
.compare-card tr:last-child td { border-bottom: none; }

.info-block { margin-top: 56px; }
.info-block h2 { font-size: 26px; margin-bottom: 16px; }
.info-block .cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 22px; }
.info-block .card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px; }
.info-block .card .num { width: 38px; height: 38px; border-radius: 10px; background: var(--c-primary-soft); color: var(--c-primary); display: grid; place-items: center; font-family: var(--font-head); font-weight: 700; font-size: 18px; margin-bottom: 12px; }
.info-block .card h3 { font-size: 17px; margin-bottom: 8px; }
.info-block .card p { font-size: 14px; }

/* ---------- Footer ---------- */
.footer { background: var(--c-footer); color: #9DB0E0; margin-top: 80px; padding: 52px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand span { font-family: var(--font-head); font-weight: 700; font-size: 20px; color: #fff; }
.footer-brand .logo-mark { width: 30px; height: 30px; }
.footer p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; font-family: var(--font-body); font-weight: 700; }
.footer-links { display: flex; flex-direction: column; gap: 9px; }
.footer-links a { font-size: 14px; transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 36px; padding-top: 22px; text-align: center; font-size: 13px; }

/* ---------- Toast ---------- */
.toast-wrap { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); z-index: 999; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: #1A2238; color: #fff; padding: 12px 22px; border-radius: 999px; font-size: 14px; box-shadow: var(--shadow-lg); animation: toastIn .3s ease; }
.toast.error { background: var(--c-danger); }
.toast.success { background: var(--c-success); }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* ---------- Empty state hidden ---------- */
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
  .info-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 768px) {
  .nav-tools, .nav-right .lang-switch { display: none; }
  .nav-toggle { display: flex; }
  .nav-right { gap: 8px; }
  .nav.mobile-open .nav-tools, .nav.mobile-open .lang-switch {
    display: block; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; padding: 14px 24px; border-bottom: 1px solid var(--c-border); box-shadow: var(--shadow);
  }
  .nav.mobile-open .nav-tools { width: auto; }
  .nav.mobile-open .nav-menu { position: static; width: auto; box-shadow: none; border: none; opacity: 1; visibility: visible; transform: none; padding: 0; }
  .nav.mobile-open .lang-switch { display: flex; width: fit-content; margin-top: 12px; }
  .hero { padding: 36px 0 18px; }
  .tool-card { padding: 18px; }
  .dropzone { padding: 32px 16px; }
  .file-item { flex-wrap: wrap; }
  .file-actions { width: 100%; justify-content: flex-end; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .options { gap: 12px; }
}

/* ---------- Homepage ---------- */
.home-hero { text-align: center; padding: 72px 0 40px; }
.home-hero h1 { font-size: clamp(34px, 5.4vw, 56px); letter-spacing: -.8px; }
.home-hero p { margin: 20px auto 0; max-width: 680px; font-size: 19px; color: var(--c-text-soft); }
/* Demoted hero title on homepage (converter is now the h1) */
.home-hero-title { font-size: clamp(20px, 2.6vw, 26px); font-weight: 600; color: var(--c-text-soft); letter-spacing: -.2px; }

/* Homepage converter widget */
.home-converter { max-width: var(--maxw); padding: 48px 24px 0; margin-bottom: 32px; text-align: center; }
.home-converter .badge-local { display: flex; width: fit-content; margin: 0 auto 18px; }
.home-converter h1 { font-size: clamp(30px, 4.6vw, 46px); letter-spacing: -.6px; margin: 14px auto 10px; text-align: center; }
.home-converter-sub { color: var(--c-text-soft); font-size: 16px; max-width: 620px; margin: 0 auto 24px; }
.home-converter #converter { text-align: left; }

.tools-section { margin: 8px auto 0; max-width: var(--maxw); padding: 0 24px; }
.tools-section-title { text-align: center; font-size: 28px; margin-bottom: 28px; }
.tools-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  margin-top: 8px;
}
.tool-tile {
  display: flex; flex-direction: column; gap: 10px;
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: 16px; padding: 26px 24px; position: relative;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  overflow: hidden;
}
.tool-tile::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(59,91,219,.04), rgba(255,107,107,.04));
  opacity: 0; transition: opacity .25s;
}
.tool-tile:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: #C9D2EE; }
.tool-tile:hover::before { opacity: 1; }
.tool-tile > * { position: relative; }
.tool-tile .tile-ic {
  width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff; box-shadow: 0 8px 18px rgba(59, 91, 219, .28);
}
.tool-tile .tile-ic svg { width: 24px; height: 24px; }
.tool-tile h3 { font-size: 19px; }
.tool-tile p { font-size: 14px; color: var(--c-text-soft); flex: 1; }
.tool-tile .tile-go {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 700; color: var(--c-accent);
  margin-top: 4px;
}
.tool-tile .tile-go svg { width: 15px; height: 15px; transition: transform .2s; }
.tool-tile:hover .tile-go svg { transform: translateX(4px); }

.features { margin: 72px auto 0; max-width: var(--maxw); padding: 0 24px; }
.features h2 { text-align: center; font-size: 30px; margin-bottom: 36px; }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card {
  text-align: center; background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: 16px; padding: 28px 20px;
}
.feature-card .f-ic {
  width: 52px; height: 52px; margin: 0 auto 14px; border-radius: 14px;
  display: grid; place-items: center; background: var(--c-primary-soft); color: var(--c-primary);
}
.feature-card .f-ic svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 16px; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--c-text-soft); }

.cta-band {
  margin: 72px auto 0; max-width: var(--maxw); padding: 0 24px;
}
.cta-inner {
  background: linear-gradient(135deg, var(--c-primary) 0%, #4A6AE8 50%, var(--c-accent) 130%);
  border-radius: 22px; padding: 48px 40px; text-align: center; color: #fff;
  box-shadow: 0 20px 50px rgba(59, 91, 219, .28);
}
.cta-inner h2 { color: #fff; font-size: 28px; margin-bottom: 12px; }
.cta-inner p { color: rgba(255,255,255,.9); font-size: 16px; max-width: 560px; margin: 0 auto 24px; }
.cta-inner .btn-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--c-primary); padding: 14px 32px;
  border-radius: var(--radius); font-weight: 700; font-size: 15px;
  transition: transform .15s, box-shadow .2s;
}
.cta-inner .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.18); }
.cta-inner .btn-cta svg { width: 18px; height: 18px; }

@media (max-width: 1023px) {
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .tools-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .home-hero { padding: 48px 0 28px; }
  .cta-inner { padding: 32px 22px; }
}