/*
 * SPDX-License-Identifier: Apache-2.0
 * Copyright 2026 CLSOFTLAB (씨엘소프트랩), Dr. Lee Il-guk (이일국)
 * styles.css — 모바일 우선 반응형 + 라이트/다크 테마.
 */

:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-2: #eef1f7;
  --text: #1a2233;
  --muted: #667089;
  --border: #d9dfeb;
  --accent: #2f6df6;
  --accent-ink: #ffffff;
  --danger: #d64535;
  --danger-bg: #fdecea;
  --warn: #b5820b;
  --warn-bg: #fdf6e3;
  --good: #1f9d55;
  --fair: #c78a12;
  --poor: #d64535;
  --shadow: 0 2px 10px rgba(20, 30, 60, 0.08);
  --radius: 12px;
  /* Canvas 씬 색상(scene.js가 참조) */
  --scene-sky-top: #8ea6c6;
  --scene-sky-bot: #bcc8da;
  --scene-ground: #6a7a63;
  --scene-person: #2c3e50;
  --scene-drone: #e0533d;
}

:root[data-theme="dark"] {
  --bg: #0f1420;
  --surface: #182031;
  --surface-2: #212b40;
  --text: #e7ecf6;
  --muted: #96a0b8;
  --border: #2c3852;
  --accent: #5b8cff;
  --accent-ink: #0b1020;
  --danger: #ff6b5c;
  --danger-bg: #38201d;
  --warn: #e6b23c;
  --warn-bg: #322a12;
  --good: #4bd08a;
  --fair: #e6b23c;
  --poor: #ff6b5c;
  --shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
  --scene-sky-top: #2a3550;
  --scene-sky-bot: #3a465f;
  --scene-ground: #33402f;
  --scene-person: #cdd6e6;
  --scene-drone: #ff6b5c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1420; --surface: #182031; --surface-2: #212b40; --text: #e7ecf6;
    --muted: #96a0b8; --border: #2c3852; --accent: #5b8cff; --accent-ink: #0b1020;
    --danger: #ff6b5c; --danger-bg: #38201d; --warn: #e6b23c; --warn-bg: #322a12;
    --good: #4bd08a; --fair: #e6b23c; --poor: #ff6b5c; --shadow: 0 2px 14px rgba(0,0,0,0.35);
    --scene-sky-top: #2a3550; --scene-sky-bot: #3a465f; --scene-ground: #33402f;
    --scene-person: #cdd6e6; --scene-drone: #ff6b5c;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Malgun Gothic", sans-serif;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; }
code { background: var(--surface-2); padding: 1px 5px; border-radius: 5px; font-size: 0.9em; }
.muted { color: var(--muted); }

/* ---------- 헤더 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 800; font-size: 1.15rem; color: var(--text); }
.site-nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.site-nav a { padding: 6px 10px; border-radius: 8px; color: var(--muted); font-weight: 600; font-size: 0.92rem; }
.site-nav a.active { background: var(--surface-2); color: var(--text); }
.site-nav a.nav-danger { color: var(--danger); }
.header-tools { display: flex; gap: 6px; }
.icon-btn {
  width: 38px; height: 38px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); border-radius: 9px; cursor: pointer; font-size: 1.05rem;
}
.icon-btn:hover { background: var(--surface-2); }

/* ---------- 레이아웃 ---------- */
#app { max-width: 1040px; margin: 0 auto; padding: 16px; }
.hero h1 { margin: 4px 0; font-size: 1.5rem; }
.hero p { color: var(--muted); margin: 4px 0 12px; }
.sec-title { margin: 26px 0 10px; font-size: 1.2rem; }

/* ---------- 배너 ---------- */
.banner { padding: 12px 14px; border-radius: var(--radius); margin: 12px 0; font-size: 0.94rem; border: 1px solid transparent; }
.banner-warn { background: var(--warn-bg); border-color: var(--warn); }
.banner-danger { background: var(--danger-bg); border-color: var(--danger); }

/* ---------- 시뮬레이터 ---------- */
.sim-layout { display: grid; grid-template-columns: 1fr; gap: 16px; }
.sim-stage { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
#scene { display: block; width: 100%; height: 360px; }
.sim-panel { display: flex; flex-direction: column; gap: 12px; }
.preset-row { display: flex; gap: 8px; flex-wrap: wrap; }
.preset { padding: 7px 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 999px; cursor: pointer; font-size: 0.9rem; }
.preset:hover { background: var(--surface-2); }

.ctrl { display: flex; flex-direction: column; gap: 4px; }
.ctrl label { display: flex; justify-content: space-between; font-weight: 600; font-size: 0.92rem; }
.ctrl output { color: var(--accent); font-variant-numeric: tabular-nums; }
input[type="range"] { width: 100%; accent-color: var(--accent); cursor: pointer; }

/* ---------- 결과 readouts ---------- */
.readouts { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.stat-main { text-align: center; padding: 14px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.stat-main .stat-label { display: block; color: var(--muted); font-size: 0.85rem; }
.stat-main .stat-value { font-size: 2.6rem; font-weight: 800; line-height: 1; }
.stat-main .stat-value small { font-size: 1.1rem; }
.stat-main .stat-hint { display: block; font-size: 0.88rem; color: var(--muted); }
.stat-good .stat-value { color: var(--good); }
.stat-fair .stat-value { color: var(--fair); }
.stat-poor .stat-value { color: var(--poor); }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat-row .stat { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 8px; text-align: center; }
.stat-row .stat-label { display: block; color: var(--muted); font-size: 0.78rem; }
.stat-value2 { font-weight: 700; font-size: 1.05rem; }
.safety-pill { padding: 8px 12px; border-radius: 10px; font-weight: 700; font-size: 0.9rem; }
.safety-ok { background: var(--surface-2); color: var(--good); }
.safety-caution { background: var(--warn-bg); color: var(--warn); }
.safety-danger { background: var(--danger-bg); color: var(--danger); }
.safety-why { display: block; font-weight: 400; color: var(--muted); font-size: 0.85rem; margin-top: 2px; }

/* ---------- AI ---------- */
.ai-block, .ai-card { margin-top: 8px; }
.ai-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin: 14px 0; box-shadow: var(--shadow); }
.ai-card h3 { margin: 0 0 4px; }
.ai-input-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0; }
.ai-input-row input { flex: 1; min-width: 200px; padding: 9px 12px; border: 1px solid var(--border); border-radius: 9px; background: var(--bg); color: var(--text); }
.btn { padding: 9px 14px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--text); cursor: pointer; font-weight: 600; }
.btn-ai { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn-ai:disabled { opacity: 0.6; cursor: progress; }
.ai-out { white-space: pre-wrap; word-break: break-word; background: var(--surface-2); border-radius: 10px; padding: 12px; min-height: 8px; margin: 8px 0 0; font-family: inherit; font-size: 0.92rem; }
.ai-out:empty { display: none; }
.ai-streaming::after { content: "▌"; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* 무인 자동 브리핑(로드 시 1회 자동 생성) */
.auto-brief { max-width: 1040px; margin: 0 auto 14px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; box-shadow: var(--shadow); }
.auto-brief-head { font-weight: 700; font-size: 0.95rem; margin-bottom: 2px; }
.auto-brief .ai-out { background: var(--surface-2); }

/* ---------- 스텝/카드 ---------- */
.steps { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 12px 0; }
.step-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; position: relative; box-shadow: var(--shadow); }
.step-no { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-weight: 800; margin-bottom: 6px; }
.step-card h3 { margin: 4px 0; }
.step-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.safety-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 12px 0; }
.danger-card { background: var(--danger-bg); border: 1px solid var(--danger); border-radius: var(--radius); padding: 14px; }
.danger-card h3 { margin: 0 0 4px; color: var(--danger); }
.danger-card p { margin: 0; font-size: 0.92rem; }
.issue-list { padding-left: 20px; }
.issue-list li { margin: 6px 0; }

/* ---------- 테이블 ---------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--border); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; min-width: 460px; background: var(--surface); }
th, td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
thead th, tfoot th { background: var(--surface-2); }
.spec-table th { width: 46%; color: var(--muted); font-weight: 600; }
.bom-table .num, td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------- 푸터/토스트 ---------- */
.site-footer { max-width: 1040px; margin: 24px auto 40px; padding: 16px; color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--border); }
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px;
  opacity: 0; pointer-events: none; transition: all 0.25s; z-index: 50; font-size: 0.9rem;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 데스크톱 ---------- */
@media (min-width: 760px) {
  .sim-layout { grid-template-columns: 1.35fr 1fr; align-items: start; }
  #scene { height: 440px; }
  .steps, .safety-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 1.9rem; }
}