/* FileKitt — shared stylesheet */
:root {
  --accent: #0891b2;
  --accent-dark: #0e7490;
  --accent-2: #2563eb;
  --accent-light: #ecfeff;
  --gradient: linear-gradient(120deg, #0891b2, #2563eb 55%, #7c3aed);
  --text: #111827;
  --text-soft: #6b7280;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e5e7eb;
  --green: #16a34a;
  --red: #dc2626;
  --amber: #d97706;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(17,24,39,.06), 0 6px 18px rgba(17,24,39,.05);
  --shadow-lg: 0 8px 30px rgba(8,145,178,.14);
}
html[data-theme="dark"] {
  --accent: #22d3ee;
  --accent-dark: #06b6d4;
  --accent-2: #60a5fa;
  --accent-light: #164e63;
  --text: #f1f5f9;
  --text-soft: #94a3b8;
  --bg: #0f172a;
  --card: #1e293b;
  --border: #334155;
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 6px 18px rgba(0,0,0,.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.5);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
header.site {
  background: color-mix(in srgb, var(--card) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
header.site .container { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.logo { font-size: 1.3rem; font-weight: 800; color: var(--text); text-decoration: none; letter-spacing: -0.5px; display: flex; align-items: center; gap: 8px; }
.logo::before { content: "🗜️"; font-size: 1.1rem; }
.logo span { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
nav.main { display: flex; align-items: center; }
nav.main > a, nav.main .drop > button {
  color: var(--text-soft); text-decoration: none; font-size: .92rem; font-weight: 600;
  margin-left: 20px; padding: 6px 2px; border-bottom: 2px solid transparent;
  background: none; border-top: none; border-left: none; border-right: none; cursor: pointer; font-family: inherit;
}
nav.main > a:hover, nav.main > a.active, nav.main .drop > button:hover { color: var(--accent); border-bottom-color: var(--accent); }
nav.main .drop { position: relative; display: inline-block; }
nav.main .drop-menu {
  display: none; position: absolute; top: 100%; right: 0; min-width: 230px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow-lg); padding: 8px; z-index: 60;
}
nav.main .drop:hover .drop-menu, nav.main .drop.open .drop-menu { display: block; }
nav.main .drop-menu a {
  display: block; padding: 8px 12px; border-radius: 8px; text-decoration: none;
  color: var(--text); font-size: .9rem; font-weight: 600;
}
nav.main .drop-menu a:hover { background: var(--accent-light); color: var(--accent); }
nav.main .drop-menu .menu-label { font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .6px; color: var(--text-soft); padding: 8px 12px 2px; }
#themeToggle { margin-left: 18px; background: none; border: none; font-size: 1.15rem; cursor: pointer; line-height: 1; }

/* Mobile nav: hamburger + slide-down menu */
#navBurger {
  display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer;
  color: var(--text); margin-left: 14px; line-height: 1; padding: 4px;
}
.mobile-menu {
  display: none; position: absolute; top: 62px; left: 0; right: 0;
  background: var(--card); border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-lg); padding: 10px 20px 18px; z-index: 49;
  max-height: calc(100vh - 62px); overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu .menu-label { font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .6px; color: var(--text-soft); padding: 12px 0 4px; }
.mobile-menu a {
  display: block; padding: 9px 10px; border-radius: 8px; text-decoration: none;
  color: var(--text); font-size: .96rem; font-weight: 600;
}
.mobile-menu a:active, .mobile-menu a:hover { background: var(--accent-light); color: var(--accent); }
@media (max-width: 860px) {
  nav.main > a:not(.keep), nav.main .drop { display: none; }
  #navBurger { display: inline-block; }
  #themeToggle { margin-left: 10px; }
}

/* ---------- Hero ---------- */
.hero-band {
  background:
    radial-gradient(900px 380px at 15% -10%, rgba(8,145,178,.14), transparent 60%),
    radial-gradient(800px 340px at 85% -10%, rgba(124,58,237,.10), transparent 60%),
    linear-gradient(180deg, var(--card), var(--bg));
  border-bottom: 1px solid var(--border);
}
.hero { text-align: center; padding: 54px 0 40px; }
.hero .eyebrow {
  display: inline-block; background: var(--accent-light); color: var(--accent);
  font-size: .8rem; font-weight: 800; letter-spacing: .6px; text-transform: uppercase;
  padding: 5px 16px; border-radius: 99px; margin-bottom: 18px;
}
.hero h1 { font-size: 2.7rem; line-height: 1.12; letter-spacing: -1.5px; max-width: 860px; margin: 0 auto 16px; }
.hero h1 .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { color: var(--text-soft); font-size: 1.14rem; max-width: 680px; margin: 0 auto 8px; }
@media (max-width: 640px) { .hero h1 { font-size: 2rem; } }

/* ---------- Split hero (homepage) ---------- */
.hero-split {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 44px; align-items: center;
  padding: 44px 0 44px; text-align: left;
}
.hero-split .eyebrow {
  display: inline-block; background: var(--accent-light); color: var(--accent);
  font-size: .8rem; font-weight: 800; letter-spacing: .6px; text-transform: uppercase;
  padding: 5px 16px; border-radius: 99px; margin-bottom: 18px;
}
.hero-split h1 { font-size: 2.5rem; line-height: 1.12; letter-spacing: -1.3px; margin-bottom: 14px; }
.hero-split h1 .grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-split p.sub { color: var(--text-soft); font-size: 1.08rem; margin-bottom: 0; }
.trust { list-style: none; margin-top: 18px; padding: 0; }
.trust li { font-size: .94rem; color: var(--text); font-weight: 600; padding: 4px 0; }
.trust li .tl { color: var(--text-soft); font-weight: 500; }
.mini-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.mini-card {
  display: flex; align-items: center; gap: 12px; background: var(--card);
  border: 1px solid var(--border); border-radius: 12px; padding: 13px 16px;
  text-decoration: none; color: var(--text); box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.mini-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.mini-card .mi { font-size: 1.45rem; flex-shrink: 0; }
.mini-card b { display: block; font-size: .93rem; letter-spacing: -0.2px; line-height: 1.3; }
.mini-card .d { display: block; font-size: .77rem; color: var(--text-soft); line-height: 1.35; }
@media (max-width: 900px) {
  .hero-split { grid-template-columns: 1fr; gap: 28px; padding: 36px 0; text-align: center; }
  .hero-split h1 { font-size: 2rem; }
}
@media (max-width: 480px) { .mini-grid { grid-template-columns: 1fr; } }

/* ---------- Tool workspace ---------- */
.tool-wrap { max-width: 860px; margin: 30px auto 10px; }
.dropzone {
  border: 2.5px dashed var(--border); border-radius: var(--radius); background: var(--card);
  padding: 48px 24px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: var(--accent-light); }
.dropzone .dz-icon { font-size: 2.4rem; margin-bottom: 10px; }
.dropzone h3 { font-size: 1.15rem; margin-bottom: 4px; }
.dropzone p { color: var(--text-soft); font-size: .92rem; }
.dropzone input[type=file] { display: none; }
.dz-note { text-align: center; color: var(--text-soft); font-size: .85rem; margin-top: 10px; }

.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 24px; margin-top: 18px;
}
.panel h3 { font-size: 1.05rem; margin-bottom: 12px; }
.opt-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 14px; }
.opt-row label { font-weight: 600; font-size: .92rem; }
.opt-row select, .opt-row input[type=number], .opt-row input[type=text] {
  padding: 9px 12px; border: 2px solid var(--border); border-radius: 9px; font-size: .95rem;
  background: var(--bg); color: var(--text); outline: none; font-family: inherit;
}
.opt-row select:focus, .opt-row input:focus { border-color: var(--accent); }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 7px 14px; border-radius: 99px; border: 1.5px solid var(--border); background: var(--bg);
  font-size: .88rem; font-weight: 700; cursor: pointer; color: var(--text); font-family: inherit;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.sel { background: var(--accent); border-color: var(--accent); color: #fff; }

.btn {
  display: inline-block; padding: 12px 26px; border-radius: 10px; font-weight: 800;
  font-size: 1rem; cursor: pointer; text-decoration: none; border: none; font-family: inherit;
  background: var(--gradient); color: #fff; box-shadow: var(--shadow);
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: var(--card); color: var(--accent); border: 2px solid var(--accent); box-shadow: none; }
.btn.small { padding: 8px 16px; font-size: .88rem; }

.progress-bar { height: 10px; background: var(--border); border-radius: 99px; overflow: hidden; margin: 14px 0 6px; display: none; }
.progress-bar .fill { height: 100%; width: 0%; background: var(--gradient); transition: width .2s; }
.progress-note { color: var(--text-soft); font-size: .88rem; text-align: center; min-height: 1.4em; }

/* File list & results */
.file-list { margin-top: 14px; }
.file-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px;
}
.file-item .fi-icon { font-size: 1.4rem; }
.file-item .fi-name { font-weight: 700; font-size: .92rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.file-item .fi-size { color: var(--text-soft); font-size: .85rem; white-space: nowrap; }
.file-item .fi-actions { display: flex; gap: 6px; }
.file-item .fi-actions button { background: none; border: 1px solid var(--border); border-radius: 7px; cursor: pointer; padding: 4px 9px; color: var(--text); font-size: .85rem; }
.file-item .fi-actions button:hover { border-color: var(--accent); color: var(--accent); }

.result-card {
  background: var(--card); border: 2px solid var(--green); border-radius: var(--radius);
  padding: 24px; margin-top: 18px; text-align: center; display: none;
}
.result-card .rc-stat { font-size: 1.05rem; margin-bottom: 6px; }
.result-card .rc-stat b.down { color: var(--green); }
.result-card .rc-stat b.warn { color: var(--amber); }
.result-card .rc-note { color: var(--text-soft); font-size: .88rem; margin-bottom: 14px; }
.size-compare { display: flex; justify-content: center; gap: 26px; margin: 10px 0 16px; flex-wrap: wrap; }
.size-compare .sc { text-align: center; }
.size-compare .sc .v { font-size: 1.4rem; font-weight: 800; }
.size-compare .sc .l { font-size: .8rem; color: var(--text-soft); text-transform: uppercase; letter-spacing: .5px; }
.size-compare .arrow { font-size: 1.6rem; color: var(--text-soft); align-self: center; }

/* Preview table (CSV / Excel) */
.tbl-scroll { overflow: auto; max-height: 420px; border: 1px solid var(--border); border-radius: 10px; margin-top: 14px; }
table.preview { border-collapse: collapse; width: 100%; font-size: .86rem; }
table.preview th, table.preview td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; white-space: nowrap; max-width: 300px; overflow: hidden; text-overflow: ellipsis; }
table.preview th { background: var(--accent-light); color: var(--accent-dark); position: sticky; top: 0; }
html[data-theme="dark"] table.preview th { color: var(--accent); }
table.preview tr:nth-child(even) td { background: color-mix(in srgb, var(--bg) 60%, transparent); }

textarea.big {
  width: 100%; min-height: 220px; padding: 14px 16px; font-size: .95rem;
  border: 2px solid var(--border); border-radius: 10px; outline: none; resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--card); color: var(--text); line-height: 1.5;
}
textarea.big:focus { border-color: var(--accent); }

/* Image compare */
.img-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
@media (max-width: 640px) { .img-compare { grid-template-columns: 1fr; } }
.img-compare .ic { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px; text-align: center; }
.img-compare .ic img { max-width: 100%; max-height: 260px; border-radius: 6px; }
.img-compare .ic .cap { font-size: .84rem; color: var(--text-soft); margin-top: 6px; font-weight: 700; }

/* ---------- Cards & grid (homepage) ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; padding: 30px 0 10px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); text-decoration: none; color: var(--text);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease; display: block; position: relative;
}
a.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.card .icon { font-size: 1.9rem; margin-bottom: 10px; }
.card h3 { font-size: 1.12rem; margin-bottom: 6px; letter-spacing: -0.3px; }
.card p { color: var(--text-soft); font-size: .92rem; }
.card .tag {
  position: absolute; top: 18px; right: 18px; font-size: .7rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: .5px; padding: 3px 10px; border-radius: 99px;
  background: var(--accent-light); color: var(--accent);
}
.section-title { text-align: center; margin: 52px 0 8px; font-size: 1.9rem; letter-spacing: -0.7px; }
.section-sub { text-align: center; color: var(--text-soft); max-width: 640px; margin: 0 auto 10px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; margin: 30px 0 10px; }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.step .num {
  width: 34px; height: 34px; border-radius: 10px; background: var(--gradient); color: #fff;
  font-weight: 800; display: flex; align-items: center; justify-content: center; margin-bottom: 12px;
}
.step h3 { font-size: 1.02rem; margin-bottom: 6px; }
.step p { color: var(--text-soft); font-size: .92rem; }

/* FAQ / content */
.content { max-width: 760px; margin: 30px auto; }
.content h2 { font-size: 1.5rem; letter-spacing: -0.5px; margin: 34px 0 12px; }
.content h3 { font-size: 1.1rem; margin: 22px 0 8px; }
.content p, .content li { color: var(--text-soft); font-size: .98rem; margin-bottom: 12px; }
.content ul, .content ol { padding-left: 22px; }
.content a { color: var(--accent); font-weight: 600; }
.faq-item { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; margin-bottom: 12px; }
.faq-item h3 { margin: 0 0 6px; font-size: 1rem; }
.faq-item p { margin: 0; }

/* Cross-links */
.xlinks { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 26px 0; }
.xlinks a {
  padding: 9px 18px; border-radius: 99px; border: 1.5px solid var(--border); background: var(--card);
  font-size: .88rem; font-weight: 700; text-decoration: none; color: var(--text);
}
.xlinks a:hover { border-color: var(--accent); color: var(--accent); }

/* Ad slots */
.ad-slot {
  background: repeating-linear-gradient(45deg, var(--bg), var(--bg) 12px, var(--card) 12px, var(--card) 24px);
  border: 1px dashed var(--border); border-radius: 10px; color: var(--text-soft);
  display: flex; align-items: center; justify-content: center; font-size: .78rem;
  text-transform: uppercase; letter-spacing: 1px; margin: 26px auto;
}
.ad-slot.leader { max-width: 728px; height: 90px; }
.ad-slot.rect { max-width: 336px; height: 280px; }

/* Toast */
#toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--text); color: var(--bg); padding: 11px 22px; border-radius: 99px;
  font-weight: 700; font-size: .9rem; opacity: 0; transition: all .25s; z-index: 99; pointer-events: none;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Footer */
footer.site { border-top: 1px solid var(--border); margin-top: 60px; padding: 40px 0 30px; background: var(--card); }
footer.site .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; }
footer.site h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .8px; color: var(--text-soft); margin-bottom: 10px; }
footer.site a { display: block; color: var(--text); text-decoration: none; font-size: .9rem; padding: 3px 0; }
footer.site a:hover { color: var(--accent); }
footer.site .fine { color: var(--text-soft); font-size: .82rem; margin-top: 26px; text-align: center; border-top: 1px solid var(--border); padding-top: 18px; }

/* ---------- Mobile polish ---------- */
@media (max-width: 640px) {
  .hero { padding: 38px 0 30px; }
  .hero p.sub { font-size: 1rem; }
  .panel { padding: 18px 16px; }
  .dropzone { padding: 34px 16px; }
  .opt-row { gap: 10px; }
  .opt-row select, .opt-row input[type=number] { max-width: 100%; }
  .result-card { padding: 18px 14px; }
  .result-card .btn { width: 100%; margin: 6px 0 0; }
  .tool-wrap { margin-top: 20px; }
  .section-title { font-size: 1.5rem; margin: 40px 0 8px; }
  textarea.big { min-height: 160px; }
  .ad-slot.leader { height: 60px; }
}