/* =========================================================
   TimeTak 디자인 시스템
   콘셉트: 네온 — 깊은 네이비 바탕, 보라→파랑 그라데이션, 은은한 빛
   기본은 다크, 오른쪽 위 버튼으로 라이트 전환
   ========================================================= */
:root {
  --bg: #05060f;
  --bg-glow-1: rgba(124, 58, 237, .22);
  --bg-glow-2: rgba(37, 99, 235, .18);
  --bg-grid: rgba(255, 255, 255, .025);
  --surface: rgba(255, 255, 255, .035);
  --surface-solid: #0d0f1f;
  --surface-2: rgba(255, 255, 255, .06);
  --surface-3: rgba(255, 255, 255, .1);
  --text: #eef0ff;
  --text-2: #a3a8c7;
  --text-3: #6b7094;
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .16);
  --accent: #8b5cf6;
  --accent-2: #3b82f6;
  --accent-ink: #ffffff;
  --accent-soft: rgba(139, 92, 246, .16);
  --accent-text: #b9a3ff;
  --grad: linear-gradient(95deg, #c084fc 0%, #8b5cf6 45%, #3b82f6 100%);
  --grad-soft: linear-gradient(135deg, rgba(168, 85, 247, .22), rgba(59, 130, 246, .18));
  --glow: 0 0 0 1px rgba(139, 92, 246, .35), 0 10px 32px -8px rgba(99, 102, 241, .6);
  --panel: #080a18;
  --panel-2: rgba(255, 255, 255, .07);
  --panel-text: #eef0ff;
  --panel-text-2: #8d92b5;
  --danger: #f43f5e;
  --work: rgba(59, 130, 246, .24);
  --work-strong: #60a5fa;
  --night: rgba(255, 255, 255, .025);
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 1px 0 rgba(255, 255, 255, .04) inset, 0 20px 50px -24px rgba(0, 0, 0, .8);
  --font-ko: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --font-num: "Space Grotesk", "Pretendard Variable", Pretendard, -apple-system, sans-serif;
  --font-brand: "Plus Jakarta Sans", "Pretendard Variable", Pretendard, sans-serif;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f6f6fd;
  --bg-glow-1: rgba(139, 92, 246, .14);
  --bg-glow-2: rgba(59, 130, 246, .12);
  --bg-grid: rgba(15, 17, 40, .035);
  --surface: rgba(255, 255, 255, .78);
  --surface-solid: #ffffff;
  --surface-2: rgba(15, 17, 40, .05);
  --surface-3: rgba(15, 17, 40, .09);
  --text: #0c0e22;
  --text-2: #565b7a;
  --text-3: #9196b3;
  --border: rgba(15, 17, 40, .09);
  --border-strong: rgba(15, 17, 40, .18);
  --accent-soft: rgba(139, 92, 246, .12);
  --accent-text: #6d3ff0;
  --work: rgba(59, 130, 246, .18);
  --work-strong: #2563eb;
  --night: rgba(15, 17, 40, .04);
  --shadow: 0 1px 2px rgba(15, 17, 40, .05), 0 18px 40px -22px rgba(40, 30, 120, .3);
  color-scheme: light;
}

/* ---------- 기본 ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--bg); }
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 520px at 0% 0%, var(--bg-glow-1), transparent 62%),
    radial-gradient(900px 620px at 100% 100%, var(--bg-glow-2), transparent 62%),
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-ko);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button, input, select { font: inherit; color: inherit; letter-spacing: inherit; }
::selection { background: var(--accent); color: #fff; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--text-2); }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-num); font-size: 12px; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent-text); margin: 0 0 12px;
}
.eyebrow::before { content: ""; width: 18px; height: 2px; border-radius: 2px; background: var(--grad); }

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: saturate(1.5) blur(14px);
  -webkit-backdrop-filter: saturate(1.5) blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; gap: 22px; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; flex: none; filter: drop-shadow(0 0 7px rgba(139, 92, 246, .75)); transition: transform .7s cubic-bezier(.6, 0, .2, 1); }
.brand:hover .brand-mark { transform: rotate(180deg); }
.brand-text { font-family: var(--font-brand); font-style: italic; font-weight: 800; font-size: 21px; letter-spacing: -0.03em; padding-right: 2px; }
.brand-text .t1 { background: linear-gradient(180deg, #ffffff 30%, #b9bdd6 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-text .t2 { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; padding-right: 3px; }
:root[data-theme="light"] .brand-text .t1 { background: linear-gradient(180deg, #1a1d3a 30%, #4a4f72 100%); -webkit-background-clip: text; background-clip: text; }
.nav { display: flex; gap: 2px; overflow-x: auto; flex: 1; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  padding: 8px 14px; color: var(--text-2); white-space: nowrap;
  font-size: 15px; font-weight: 600; border-radius: 999px; transition: color .15s, background .15s;
}
.nav a:hover { color: var(--text); text-decoration: none; background: var(--surface-2); }
.nav a.active { color: var(--text); background: var(--accent-soft); box-shadow: inset 0 0 0 1px rgba(139, 92, 246, .4); }
.icon-btn {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  width: 40px; height: 40px; border-radius: 999px; cursor: pointer; flex: none;
  display: grid; place-items: center; transition: background .15s, box-shadow .15s;
}
.icon-btn:hover { background: var(--surface-2); box-shadow: var(--glow); }
.icon-btn svg { width: 18px; height: 18px; }

/* ---------- 페이지 머리말 ---------- */
main { padding: 44px 0 72px; }
.page-head { margin-bottom: 30px; }
h1 {
  font-size: clamp(28px, 4.4vw, 44px); line-height: 1.15; margin: 0 0 12px;
  font-weight: 800; letter-spacing: -0.04em;
}
.lead { color: var(--text-2); margin: 0; font-size: 17px; max-width: 640px; }

/* ---------- 카드, 버튼, 입력 ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  padding: 10px 20px; border-radius: 999px; cursor: pointer; font-weight: 700; font-size: 15px;
  min-height: 46px; transition: transform .08s, background .15s, box-shadow .2s, filter .15s;
  text-decoration: none;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad); border-color: transparent; color: #fff; box-shadow: var(--glow); }
.btn-primary:hover { background: var(--grad); filter: brightness(1.12); }
.btn-lg { font-size: 17px; padding: 14px 32px; min-width: 132px; min-height: 56px; }
.chip {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 7px 16px; border-radius: 999px; cursor: pointer; font-size: 14px; font-weight: 600;
  min-height: 38px; display: inline-flex; align-items: center; transition: border-color .15s, background .15s, box-shadow .15s;
}
.chip:hover { border-color: rgba(139, 92, 246, .6); background: var(--accent-soft); text-decoration: none; color: var(--text); }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field label { font-size: 12px; color: var(--text-2); font-weight: 700; letter-spacing: .02em; }
.input, select.input {
  border: 1px solid var(--border-strong); background: var(--surface); border-radius: var(--radius-sm);
  padding: 11px 14px; min-height: 48px; width: 100%; font-weight: 600; color: var(--text);
}
select.input {
  appearance: none; -webkit-appearance: none; padding-right: 38px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%238d92b5' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center;
}
select.input option { background: var(--surface-solid); color: var(--text); }
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.badge {
  display: inline-flex; align-items: center; font-size: 12px; padding: 2px 9px; border-radius: 999px;
  font-weight: 700; background: rgba(255, 255, 255, .14);
}

/* ---------- 본문 설명 글 ---------- */
.article { margin-top: 64px; padding-top: 44px; border-top: 1px solid var(--border); max-width: 740px; }
.article h2 { font-size: 22px; margin: 36px 0 10px; letter-spacing: -0.03em; }
.article h2:first-child { margin-top: 0; }
.article h3 { font-size: 16px; margin: 22px 0 4px; }
.article p, .article li { color: var(--text-2); }
.article strong { color: var(--text); }
.article ul, .article ol { padding-left: 20px; }
.article li { margin: 4px 0; }
.article li::marker { color: var(--accent); }

/* ---------- 광고 자리 (비어 있으면 숨김) ---------- */
.ad-slot { margin: 32px auto; text-align: center; min-height: 100px; }
.ad-slot:empty { display: none; }

/* ---------- 푸터 ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0 44px; color: var(--text-3); font-size: 14px; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; align-items: center; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--text-2); }

/* =========================================================
   홈
   ========================================================= */
.hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; padding: 12px 0 20px; }
.hero h1 { font-size: clamp(36px, 6vw, 64px); line-height: 1.06; margin-bottom: 20px; }
.hero h1 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: 18px; }
.hero-now {
  display: inline-flex; align-items: baseline; gap: 14px; flex-wrap: wrap; margin-top: 30px;
  padding: 14px 20px; border-radius: 16px; background: var(--surface); border: 1px solid var(--border);
}
.hero-now .digital { font-size: 38px; font-weight: 700; line-height: 1; }
.hero-now .where { color: var(--text-2); font-size: 14px; }
.analog { width: 100%; max-width: 360px; aspect-ratio: 1; justify-self: center; display: block; overflow: visible; }
.analog .face { fill: var(--surface-solid); }
.analog .rim { fill: none; stroke: var(--border-strong); stroke-width: 1.5; }
.analog .arc { fill: none; stroke: url(#arc-grad); stroke-width: 3.5; stroke-linecap: round; filter: drop-shadow(0 0 4px rgba(139, 92, 246, .9)); }
.analog .arc-dot { fill: #c4b5fd; filter: drop-shadow(0 0 6px #a78bfa); }
.analog .tick { stroke: var(--text-3); stroke-width: 1.2; stroke-linecap: round; }
.analog .tick.major { stroke: var(--text-2); stroke-width: 2.6; }
.analog .numeral { fill: var(--text); font-family: var(--font-num); font-size: 14px; font-weight: 700; text-anchor: middle; dominant-baseline: central; }
.analog .hand-h { stroke: var(--text); stroke-width: 6.5; stroke-linecap: round; }
.analog .hand-m { stroke: var(--text); stroke-width: 4; stroke-linecap: round; }
.analog .hand-s { stroke: #a78bfa; stroke-width: 1.8; stroke-linecap: round; }
.analog .pin { fill: url(#arc-grad); }
.analog .pin-in { fill: var(--surface-solid); }

.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 52px; }
.tool-card {
  position: relative; display: flex; flex-direction: column; gap: 14px; color: var(--text);
  padding: 26px; min-height: 250px; overflow: hidden;
  transition: transform .25s cubic-bezier(.2, .8, .2, 1), border-color .25s, box-shadow .25s;
}
.tool-card::after {
  content: ""; position: absolute; inset: auto -40% -60% auto; width: 240px; height: 240px; border-radius: 50%;
  background: var(--tile-glow, rgba(139, 92, 246, .25)); filter: blur(60px); opacity: .5; transition: opacity .3s; pointer-events: none;
}
.tool-card:hover { text-decoration: none; transform: translateY(-4px); border-color: rgba(139, 92, 246, .45); box-shadow: var(--glow); }
.tool-card:hover::after { opacity: 1; }
.tool-card .idx { font-family: var(--font-num); font-size: 13px; font-weight: 700; color: var(--text-3); letter-spacing: .1em; }
.tool-card .ico {
  width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; color: #fff;
  background: var(--tile, var(--grad)); box-shadow: 0 8px 24px -6px var(--tile-glow, rgba(139, 92, 246, .6));
}
.tool-card .ico svg { width: 26px; height: 26px; }
.tool-card h2 { font-size: 21px; margin: 0; letter-spacing: -0.03em; }
.tool-card p { margin: 0; color: var(--text-2); font-size: 15px; flex: 1; }
.tool-card .go { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; font-size: 14px; color: var(--accent-text); }
.tool-card .go svg { width: 16px; height: 16px; transition: transform .2s; }
.tool-card:hover .go svg { transform: translateX(4px); }
.tile-timer { --tile: linear-gradient(135deg, #c084fc, #8b5cf6); --tile-glow: rgba(168, 85, 247, .55); }
.tile-world { --tile: linear-gradient(135deg, #818cf8, #3b82f6); --tile-glow: rgba(59, 130, 246, .55); }
.tile-diff  { --tile: linear-gradient(135deg, #60a5fa, #22d3ee); --tile-glow: rgba(34, 211, 238, .45); }

/* =========================================================
   타이머 — 네온 계기판
   ========================================================= */
.tabs {
  display: inline-flex; background: var(--surface); border-radius: 999px; padding: 4px;
  margin-bottom: 16px; border: 1px solid var(--border);
}
.tabs button {
  border: 0; background: transparent; padding: 8px 22px; border-radius: 999px;
  cursor: pointer; font-weight: 700; color: var(--text-2); min-height: 40px;
}
.tabs button.active { background: var(--grad); color: #fff; box-shadow: var(--glow); }

.instrument {
  background: radial-gradient(ellipse at 50% -10%, rgba(139, 92, 246, .22), transparent 55%), var(--panel);
  color: var(--panel-text); border-radius: 28px;
  padding: 40px 24px 32px; text-align: center; position: relative; overflow: hidden;
  border: 1px solid rgba(139, 92, 246, .22);
  box-shadow: 0 40px 80px -40px rgba(76, 29, 149, .7), inset 0 1px 0 rgba(255, 255, 255, .05);
}
.ring-wrap { position: relative; width: min(420px, 78vw); aspect-ratio: 1; margin: 0 auto; }
.ring { width: 100%; height: 100%; transform: rotate(-90deg); display: block; overflow: visible; }
.ring .track { fill: none; stroke: rgba(255, 255, 255, .06); stroke-width: 5; }
.ring .ticks { fill: none; stroke: rgba(196, 181, 253, .22); stroke-width: 6; }
.ring .bar {
  fill: none; stroke: url(#ring-grad); stroke-width: 5.5; stroke-linecap: round;
  transition: stroke-dashoffset .25s linear;
  filter: drop-shadow(0 0 6px rgba(139, 92, 246, .85));
}
.ring-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; }
.ring-label { font-family: var(--font-num); font-size: 12px; letter-spacing: .22em; color: var(--panel-text-2); font-weight: 700; text-transform: uppercase; }
.timer-display {
  font-family: var(--font-num); font-variant-numeric: tabular-nums;
  font-size: clamp(52px, 13vw, 96px); font-weight: 700; letter-spacing: -0.04em; line-height: 1;
  text-shadow: 0 0 30px rgba(139, 92, 246, .35);
}
.instrument.is-done .timer-display { color: #fda4af; animation: blink 1s steps(2) infinite; text-shadow: 0 0 30px rgba(244, 63, 94, .6); }
.instrument.is-done .ring .bar { stroke: var(--danger); filter: drop-shadow(0 0 8px rgba(244, 63, 94, .9)); }
@keyframes blink { 50% { opacity: .3; } }

.timer-inputs { display: flex; justify-content: center; gap: 6px; align-items: flex-start; margin: 28px 0 0; }
.timer-inputs label { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.timer-inputs input {
  width: 82px; text-align: center; font-family: var(--font-num); font-size: 30px; font-weight: 700;
  border: 1px solid rgba(255, 255, 255, .1); background: rgba(255, 255, 255, .04); color: var(--panel-text);
  border-radius: 14px; padding: 8px 4px; -moz-appearance: textfield;
}
.timer-inputs input::-webkit-outer-spin-button, .timer-inputs input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.timer-inputs input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(139, 92, 246, .3); }
.timer-inputs .sep { font-family: var(--font-num); font-size: 28px; font-weight: 700; color: var(--panel-text-2); padding-top: 8px; }
.timer-inputs small { font-size: 11px; color: var(--panel-text-2); font-weight: 600; letter-spacing: .05em; }
.controls { justify-content: center; gap: 10px; margin-top: 28px; }
.instrument .btn { background: rgba(255, 255, 255, .04); border-color: rgba(255, 255, 255, .14); color: var(--panel-text); }
.instrument .btn:hover { background: rgba(255, 255, 255, .09); }
.instrument .btn-primary { background: var(--grad); border-color: transparent; color: #fff; }
.instrument .icon-only { width: 56px; min-width: 56px; padding: 0; }
.presets { justify-content: center; margin-top: 18px; }
.instrument .chip { background: rgba(255, 255, 255, .04); border-color: rgba(255, 255, 255, .12); color: var(--panel-text); }
.instrument .chip:hover { border-color: rgba(167, 139, 250, .8); background: rgba(139, 92, 246, .18); box-shadow: 0 0 16px -4px rgba(139, 92, 246, .7); }
.toggle-line { display: inline-flex; align-items: center; gap: 8px; color: var(--panel-text-2); font-size: 14px; cursor: pointer; margin-top: 20px; }
.toggle-line input { accent-color: var(--accent); width: 16px; height: 16px; }
.kbd-hint { font-size: 13px; color: var(--panel-text-2); margin: 14px 0 0; }
kbd {
  font-family: var(--font-num); border: 1px solid rgba(255, 255, 255, .18); border-bottom-width: 2px;
  border-radius: 6px; padding: 1px 6px; font-size: 11px; background: rgba(255, 255, 255, .04);
}
.sw-display { font-size: clamp(56px, 15vw, 120px); margin: 24px 0 8px; }
.laps { max-width: 440px; margin: 24px auto 0; padding: 0; list-style: none; text-align: left; }
.laps li { display: grid; grid-template-columns: 1fr 1fr 1fr; padding: 10px 4px; border-top: 1px solid rgba(255, 255, 255, .07); color: var(--panel-text-2); }
.laps li span:nth-child(2) { text-align: center; }
.laps li span:last-child { text-align: right; color: var(--panel-text); }
.instrument:fullscreen { display: flex; flex-direction: column; justify-content: center; border-radius: 0; }
.instrument:fullscreen .ring-wrap { width: min(78vmin, 900px); }
.instrument:fullscreen .timer-display { font-size: 17vmin; }
.instrument:fullscreen .timer-inputs, .instrument:fullscreen .presets, .instrument:fullscreen .toggle-line, .instrument:fullscreen .kbd-hint { display: none; }

/* =========================================================
   세계 시계 — 도시의 하늘색 카드 (네온 버전)
   ========================================================= */
.local-strip { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; padding: 20px 24px; margin-bottom: 20px; }
.local-strip .t { font-size: 44px; font-weight: 700; line-height: 1; }
.local-strip .lbl { font-size: 13px; color: var(--text-2); font-weight: 600; margin-bottom: 6px; }
.local-strip .d { color: var(--text-2); font-size: 14px; margin-top: 6px; }
.search-wrap { position: relative; width: min(100%, 380px); }
.search-wrap .input { padding-left: 42px; }
.search-wrap .s-ico { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--text-3); pointer-events: none; }
.search-results {
  position: absolute; z-index: 15; left: 0; right: 0; top: calc(100% + 6px);
  background: var(--surface-solid); border: 1px solid var(--border-strong); border-radius: 14px;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, .7); max-height: 320px; overflow-y: auto; margin: 0; padding: 6px; list-style: none;
}
.search-results:empty { display: none; }
.search-results li button {
  width: 100%; text-align: left; border: 0; background: transparent; padding: 10px 12px;
  border-radius: 10px; cursor: pointer; display: flex; justify-content: space-between; gap: 8px;
}
.search-results li button:hover, .search-results li button:focus { background: var(--accent-soft); outline: none; }

.clock-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(232px, 1fr)); gap: 14px; }
.clock-card {
  position: relative; border-radius: var(--radius); padding: 18px 18px 16px; min-height: 176px;
  display: flex; flex-direction: column; overflow: hidden; color: #fff;
  background: var(--sky); box-shadow: var(--shadow); border: 1px solid rgba(255, 255, 255, .1);
  --sky-ink-2: rgba(255, 255, 255, .7);
}
.clock-card.sky-night { --sky: linear-gradient(160deg, #0a0d26 0%, #1e1650 100%); }
.clock-card.sky-dawn  { --sky: linear-gradient(160deg, #4c1d95 0%, #db2777 100%); }
.clock-card.sky-day   { --sky: linear-gradient(160deg, #1d4ed8 0%, #38bdf8 100%); }
.clock-card.sky-dusk  { --sky: linear-gradient(160deg, #6d28d9 0%, #f97316 110%); }
.clock-card.sky-night::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .7;
  background-image:
    radial-gradient(1px 1px at 20% 30%, #fff, transparent),
    radial-gradient(1px 1px at 70% 20%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 85% 60%, #c4b5fd, transparent),
    radial-gradient(1px 1px at 40% 75%, #fff, transparent),
    radial-gradient(1px 1px at 60% 45%, #93c5fd, transparent);
}
.clock-card > * { position: relative; z-index: 1; }
.clock-card .top { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.clock-card .city { font-weight: 800; font-size: 18px; letter-spacing: -0.03em; line-height: 1.25; }
.clock-card .country { font-size: 12px; color: var(--sky-ink-2); font-weight: 600; }
.clock-card .mini { width: 46px; height: 46px; flex: none; }
.clock-card .mini circle.f { fill: rgba(255, 255, 255, .12); stroke: rgba(255, 255, 255, .5); stroke-width: 1.5; }
.clock-card .mini line { stroke: #fff; stroke-linecap: round; }
.clock-card .time { font-size: 44px; font-weight: 700; letter-spacing: -0.04em; line-height: 1; margin-top: auto; padding-top: 14px; text-shadow: 0 0 24px rgba(255, 255, 255, .25); }
.clock-card .time small { font-size: 16px; font-weight: 600; color: var(--sky-ink-2); margin-left: 4px; letter-spacing: 0; }
.clock-card .meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; font-size: 12px; align-items: center; color: var(--sky-ink-2); font-weight: 600; }
.clock-card .meta .badge { background: rgba(255, 255, 255, .16); color: #fff; }
.clock-card .meta .badge.strong { background: rgba(0, 0, 0, .28); }
.clock-card.is-local { box-shadow: 0 0 0 2px #a78bfa, 0 0 28px -4px rgba(139, 92, 246, .8); }
.clock-card .remove {
  position: absolute; top: 8px; right: 8px; z-index: 2; border: 0; cursor: pointer;
  width: 28px; height: 28px; border-radius: 999px; display: grid; place-items: center;
  background: rgba(0, 0, 0, .35); color: #fff; opacity: 0; transition: opacity .15s;
}
.clock-card:hover .remove, .clock-card .remove:focus { opacity: 1; }
@media (hover: none) { .clock-card .remove { opacity: .8; } }
.clock-card .remove svg { width: 14px; height: 14px; }
.empty-note { color: var(--text-2); padding: 24px; text-align: center; border: 1px dashed var(--border-strong); border-radius: var(--radius); grid-column: 1 / -1; }
.below-grid { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

/* =========================================================
   시차 계산기
   ========================================================= */
.convert-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: end; }
.swap-btn { width: 48px; min-width: 48px; padding: 0; }
.swap-btn:hover { box-shadow: var(--glow); }
.when-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 12px; align-items: end; margin-top: 14px; }

.result {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: stretch;
  margin-top: 22px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
}
.result-side { padding: 22px 22px 20px; background: var(--surface-2); min-width: 0; }
.result-side.to {
  background: radial-gradient(ellipse at 100% 0%, rgba(59, 130, 246, .3), transparent 60%), radial-gradient(ellipse at 0% 100%, rgba(139, 92, 246, .3), transparent 60%), var(--panel);
  color: var(--panel-text); padding-left: 46px;
}
.result-side .who { font-size: 13px; font-weight: 700; color: var(--text-2); display: flex; gap: 6px; align-items: center; }
.result-side.to .who { color: var(--panel-text-2); }
.result-side .big { font-family: var(--font-num); font-variant-numeric: tabular-nums; font-size: clamp(38px, 7vw, 58px); font-weight: 700; letter-spacing: -0.04em; line-height: 1.05; margin: 8px 0 6px; }
.result-side.to .big { text-shadow: 0 0 28px rgba(139, 92, 246, .5); }
.result-side .big small { font-size: .4em; font-weight: 700; margin-right: 6px; letter-spacing: 0; vertical-align: .15em; }
.result-side .date { font-size: 14px; color: var(--text-2); }
.result-side.to .date { color: var(--panel-text-2); }
.result-side .rel { display: inline-block; margin-left: 6px; font-size: 12px; font-weight: 700; padding: 1px 8px; border-radius: 999px; background: var(--grad); color: #fff; }
.result-arrow { display: grid; place-items: center; width: 0; position: relative; z-index: 1; }
.result-arrow span {
  width: 40px; height: 40px; border-radius: 50%; background: var(--grad); color: #fff;
  display: grid; place-items: center; box-shadow: 0 0 0 5px var(--bg), 0 0 20px rgba(139, 92, 246, .8);
}
.result-arrow svg { width: 18px; height: 18px; }
.diff-line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-top: 16px; }
.diff-pill { font-weight: 800; font-size: 17px; letter-spacing: -0.02em; }
.diff-pill b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.diff-note { color: var(--text-2); font-size: 14px; }

.planner-card { margin-top: 20px; }
.planner-card h2 { margin: 0 0 4px; font-size: 20px; letter-spacing: -0.03em; }
.planner-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; align-items: flex-end; margin-bottom: 16px; }
.planner-head p { margin: 0; font-size: 14px; color: var(--text-2); max-width: 520px; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--text-2); margin-top: 14px; }
.legend i { display: inline-block; width: 12px; height: 12px; border-radius: 4px; vertical-align: -1px; margin-right: 5px; }
.extra-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.pairs { margin-top: 36px; }
.pairs h2 { font-size: 18px; margin: 0 0 12px; letter-spacing: -0.03em; }
.pair-links { display: flex; flex-wrap: wrap; gap: 8px; }

/* =========================================================
   달력 · 시간 선택기
   ========================================================= */
.picker { position: relative; }
/* 팝업이 열린 카드는 다음 카드보다 위에 그리기 */
.card { position: relative; }
.card:focus-within, .card:has(.picker.is-open), .card:has(.search-results:not(:empty)) { z-index: 10; }
.picker-btn { display: flex; align-items: center; gap: 10px; text-align: left; cursor: pointer; transition: border-color .15s, box-shadow .15s; }
.picker-btn:hover { border-color: rgba(139, 92, 246, .6); }
.picker-btn svg { width: 18px; height: 18px; color: var(--text-3); flex: none; }
.picker-btn .val { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.picker-btn .chev { width: 14px; height: 14px; transition: transform .2s; }
.picker.is-open .picker-btn { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.picker.is-open .picker-btn .chev { transform: rotate(180deg); }

.popover {
  position: absolute; z-index: 30; top: calc(100% + 8px); left: 0;
  width: 316px; max-width: calc(100vw - 32px);
  background: var(--surface-solid); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: 20px; padding: 14px;
  box-shadow: 0 30px 70px -20px rgba(0, 0, 0, .75), 0 0 0 1px rgba(139, 92, 246, .12);
  transform-origin: top left; animation: pop-in .16s cubic-bezier(.2, .8, .2, 1);
}
.popover[hidden] { display: none; }
@keyframes pop-in { from { opacity: 0; transform: translateY(-4px) scale(.97); } }
.popover button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
.popover button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.pop-head { display: flex; align-items: center; justify-content: space-between; margin: 0 0 10px; }
.pop-head strong { font-size: 16px; font-weight: 700; letter-spacing: -0.02em; }
.pop-nav { width: 36px; height: 36px; border-radius: 999px; display: grid; place-items: center; color: var(--text-2) !important; }
.pop-nav:hover { background: var(--surface-2) !important; color: var(--text) !important; }
.pop-nav svg { width: 18px; height: 18px; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; }
.cal-wd { text-align: center; font-size: 12px; font-weight: 700; color: var(--text-3); padding: 4px 0 6px; }
.cal-wd.sun, .cal-day.sun { color: #fb7185; }
.cal-wd.sat, .cal-day.sat { color: #60a5fa; }
.cal-day { aspect-ratio: 1; display: grid; place-items: center; border-radius: 999px; font-family: var(--font-num); font-size: 14px; font-weight: 600; position: relative; }
button.cal-day:hover { background: var(--surface-2) !important; }
.cal-day.out { color: var(--text-3) !important; opacity: .45; }
.cal-day.is-today::after { content: ""; position: absolute; bottom: 5px; left: 50%; width: 4px; height: 4px; margin-left: -2px; border-radius: 50%; background: #a78bfa; }
.cal-day.is-selected { background: var(--grad) !important; color: #fff !important; font-weight: 800; box-shadow: 0 0 16px rgba(139, 92, 246, .7); }
.cal-day.is-selected::after { background: #fff; }
.pop-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.pop-link { font-weight: 700; font-size: 14px; color: var(--accent-text) !important; padding: 6px 10px !important; border-radius: 999px; }
.pop-link:hover { background: var(--accent-soft) !important; }
.pop-done { font-weight: 700; font-size: 14px; padding: 8px 18px !important; border-radius: 999px; background: var(--grad) !important; color: #fff !important; }
.tp-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 4px; }
.seg { display: inline-flex; background: var(--surface-2); border-radius: 999px; padding: 3px; }
.seg button { padding: 6px 14px; border-radius: 999px; font-weight: 700; font-size: 14px; color: var(--text-2) !important; }
.seg button.is-selected { background: var(--grad) !important; color: #fff !important; }
.tp-fine { display: inline-flex; align-items: center; gap: 2px; }
.tp-fine span { font-size: 20px; font-weight: 700; min-width: 64px; text-align: center; }
.tp-fine button { width: 30px; height: 30px; border-radius: 999px; font-size: 18px; font-weight: 700; color: var(--text-2) !important; }
.tp-fine button:hover { background: var(--surface-2) !important; color: var(--text) !important; }
.tp-label { font-size: 11px; font-weight: 700; letter-spacing: .08em; color: var(--text-3); margin: 12px 0 6px; }
.tp-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 4px; }
.tp-grid button { height: 38px; border-radius: 10px; font-size: 15px; font-weight: 600; background: var(--surface-2) !important; transition: background .12s; }
.tp-grid button:hover { background: var(--surface-3) !important; }
.tp-grid button.is-selected { background: var(--grad) !important; color: #fff !important; font-weight: 800; box-shadow: 0 0 14px rgba(139, 92, 246, .6); }

/* =========================================================
   모바일
   ========================================================= */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 24px; }
  .analog { max-width: 260px; order: -1; }
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card { min-height: 0; }
}
@media (max-width: 640px) {
  main { padding: 28px 0 48px; }
  .site-header .container { gap: 8px; height: 60px; }
  .brand-text { display: none; }
  .nav { gap: 0; }
  .nav a { padding: 7px 10px; font-size: 14px; }
  .card { padding: 18px; }
  .instrument { padding: 28px 14px 24px; border-radius: 24px; }
  .timer-inputs input { width: 68px; font-size: 26px; }
  .convert-grid { grid-template-columns: 1fr; }
  .swap-btn { justify-self: center; transform: rotate(90deg); }
  .when-grid { grid-template-columns: 1fr; }
  .result { grid-template-columns: 1fr; }
  .result-arrow { width: auto; height: 0; }
  .result-arrow span { transform: rotate(90deg); }
  .result-side.to { padding-left: 22px; padding-top: 30px; }
  .local-strip .t { font-size: 36px; }
  .hero-now .digital { font-size: 30px; }
  .popover { width: 100%; max-width: none; }
}

/* =========================================================
   도시 선택기
   ========================================================= */
.city-btn { min-height: 56px; padding-top: 8px; padding-bottom: 8px; }
.city-val { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.city-val .cn { font-size: 16px; font-weight: 800; letter-spacing: -0.02em; overflow: hidden; text-overflow: ellipsis; }
.city-val .cm { font-size: 12px; font-weight: 600; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; }
.convert-grid { align-items: end; }
.convert-grid .swap-btn { margin-bottom: 4px; }
.city-pop { width: 380px; padding: 0; overflow: hidden; }
.city-search { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.city-search svg { width: 18px; height: 18px; color: var(--text-3); flex: none; }
.city-search input { flex: 1; border: 0; background: transparent; outline: none; font-size: 15px; font-weight: 600; color: var(--text); min-width: 0; }
.city-search input::placeholder { color: var(--text-3); font-weight: 500; }
.city-list { max-height: 360px; overflow-y: auto; padding: 6px 8px 10px; overscroll-behavior: contain; }
.city-pop-sec { font-size: 11px; font-weight: 800; letter-spacing: .1em; color: var(--text-3); padding: 12px 8px 6px; text-transform: uppercase; }
.city-chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 6px 4px; }
.city-chip { padding: 6px 12px !important; border-radius: 999px; font-size: 13px; font-weight: 700; background: var(--surface-2) !important; border: 1px solid var(--border) !important; }
.city-chip:hover { border-color: rgba(139, 92, 246, .6) !important; }
.city-chip.is-current { background: var(--grad) !important; color: #fff !important; border-color: transparent !important; }
.city-row {
  width: 100%; display: flex; align-items: center; gap: 12px; text-align: left;
  padding: 9px 10px !important; border-radius: 12px; position: relative;
}
.city-row:hover, .city-row.is-active { background: var(--surface-2) !important; }
.city-row.is-current { background: var(--accent-soft) !important; box-shadow: inset 0 0 0 1px rgba(139, 92, 246, .45); }
.cr-name { flex: 1; display: flex; flex-direction: column; min-width: 0; line-height: 1.3; }
.cr-name b { font-size: 15px; font-weight: 700; }
.cr-name small { font-size: 12px; color: var(--text-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cr-time { display: flex; flex-direction: column; align-items: flex-end; font-size: 14px; font-weight: 700; line-height: 1.3; white-space: nowrap; }
.cr-time small { font-size: 11px; color: var(--text-3); font-weight: 600; }
.cr-check { width: 16px; height: 16px; color: var(--accent-text); flex: none; }
.city-empty { color: var(--text-2); text-align: center; padding: 24px 8px; margin: 0; font-size: 14px; }

/* =========================================================
   미팅 플래너 — 타임라인
   ========================================================= */
:root { --tl-night: #0f1230; --tl-edge: #1e2350; --tl-work: linear-gradient(180deg, #7c5cf6 0%, #4f6ff5 100%); --tl-night-ink: #5d6290; --tl-edge-ink: #a3a8c7; }
:root[data-theme="light"] { --tl-night: #e4e6f4; --tl-edge: #cfd4f0; --tl-work: linear-gradient(180deg, #8b6cf7 0%, #5b7cf7 100%); --tl-night-ink: #9196b3; --tl-edge-ink: #565b7a; }
.planner-scroll { overflow-x: auto; margin: 0 -6px; padding: 6px 6px 8px; }
.tl-inner { --lw: 136px; position: relative; min-width: 780px; }
.tl-row { display: grid; grid-template-columns: var(--lw) repeat(24, minmax(26px, 1fr)); align-items: center; }
.tl-row + .tl-row { margin-top: 10px; }
.tl-label { display: flex; flex-direction: column; line-height: 1.25; padding-right: 12px; min-width: 0; }
.tl-label b { font-size: 14px; font-weight: 800; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tl-label small { font-size: 12px; color: var(--text-3); font-weight: 600; white-space: nowrap; }
.tl-marks { margin-bottom: -2px; }
.tl-hint { font-size: 11px; font-weight: 800; letter-spacing: .06em; color: var(--accent-text); white-space: nowrap; }
.tl-mark { height: 6px; margin: 0 1px; border-radius: 3px; }
.tl-mark.on { background: var(--grad); box-shadow: 0 0 10px rgba(139, 92, 246, .8); }
.tl-cell {
  height: 44px; border: 0; padding: 0; cursor: pointer; position: relative;
  display: grid; place-items: center; font: inherit; font-family: var(--font-num); font-size: 12px; font-weight: 700;
  background: var(--tl-edge); color: var(--tl-edge-ink);
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .14);
  transition: filter .12s;
}
.tl-cell i { font-style: normal; font-size: 9px; opacity: .8; }
.tl-cell.night { background: var(--tl-night); color: var(--tl-night-ink); }
.tl-cell.work { background: var(--tl-work); color: #fff; }
.tl-cell:hover { filter: brightness(1.25); z-index: 1; }
.tl-cell:focus-visible { outline: 2px solid #fff; outline-offset: -2px; z-index: 2; }
.tl-row > .tl-cell:nth-child(2) { border-radius: 12px 0 0 12px; }
.tl-row > .tl-cell:last-child { border-radius: 0 12px 12px 0; box-shadow: none; }
.tl-cell.newday::before { content: ""; position: absolute; left: 0; top: -4px; bottom: -4px; width: 2px; border-radius: 2px; background: #f472b6; box-shadow: 0 0 8px #f472b6; }
.tl-date { font-size: 10px; font-weight: 800; color: #f9a8d4; line-height: 1; }
.tl-cell.work .tl-date { color: #fff; }
.tl-sel {
  position: absolute; top: 0; bottom: -6px; pointer-events: none;
  left: calc(var(--lw) + (100% - var(--lw)) * var(--sel) / 24);
  width: calc((100% - var(--lw)) / 24);
  border-radius: 10px; border: 2px solid #c4b5fd;
  background: rgba(196, 181, 253, .12);
  box-shadow: 0 0 0 1px rgba(139, 92, 246, .5), 0 0 22px rgba(139, 92, 246, .7);
  transition: left .25s cubic-bezier(.2, .8, .2, 1);
}
:root[data-theme="light"] .tl-sel { border-color: #7c3aed; background: rgba(124, 58, 237, .1); }
.legend { display: flex; gap: 8px 18px; flex-wrap: wrap; font-size: 13px; color: var(--text-2); margin-top: 16px; }
.legend i { display: inline-block; width: 14px; height: 10px; border-radius: 3px; vertical-align: 0; margin-right: 6px; }
.legend .lg-work { background: var(--tl-work); }
.legend .lg-edge { background: var(--tl-edge); }
.legend .lg-night { background: var(--tl-night); box-shadow: inset 0 0 0 1px var(--border-strong); }
.legend .lg-best { background: var(--grad); height: 4px; vertical-align: 3px; box-shadow: 0 0 8px rgba(139, 92, 246, .8); }
.legend .lg-day { width: 2px; height: 12px; background: #f472b6; vertical-align: -1px; }
@media (max-width: 640px) {
  .tl-inner { --lw: 96px; }
  .city-pop { width: 100%; }
}
#to-field .city-pop { left: auto; right: 0; transform-origin: top right; }
/* 가로 스크롤해도 도시 이름은 왼쪽에 고정 */
.tl-label { position: sticky; left: 0; z-index: 3; background: var(--surface-solid); align-self: stretch; justify-content: center; box-shadow: 8px 0 12px -10px rgba(0, 0, 0, .6); }
.tl-marks .tl-label { box-shadow: none; }
.tl-sel { z-index: 2; }