/* d1_1_style.css - shared professional design, one class per line per s0_rules #9 */
:root { --ink: #16202c; --muted: #5d6b7d; --line: #e2e8f0; --bg: #f5f8fc; --card: #ffffff; --primary: #1f3a5f; --primary2: #2c5a86; --accent: #2fa6a0; --accent-soft: #e6f4f3; }
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", system-ui, Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.55; }
a { color: var(--primary2); text-decoration: none; }
.nav { display: flex; align-items: center; gap: 18px; padding: 12px 28px; background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.nav .logo { width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--accent)); }
.nav .brand { font-weight: 700; font-size: 16px; color: var(--primary); }
.nav .spacer { flex: 1; }
.nav a.navlink { color: var(--muted); font-size: 14px; padding: 6px 4px; }
.nav a.navlink:hover { color: var(--primary); }
.nav a.navlink.active { color: var(--primary); font-weight: 600; border-bottom: 2px solid var(--accent); }
.lang-btn { padding: 5px 12px; border: 1px solid var(--line); border-radius: 16px; background: #fff; color: var(--primary); cursor: pointer; font-size: 13px; }
.lang-btn:hover { background: var(--accent-soft); }
.hero { padding: 72px 28px 56px; text-align: center; background: radial-gradient(1200px 400px at 50% -10%, #e9f1fb 0%, var(--bg) 60%); }
.hero h1 { font-size: 40px; margin: 0 0 16px; color: var(--primary); letter-spacing: -0.5px; }
.hero p { max-width: 720px; margin: 0 auto 28px; font-size: 17px; color: var(--muted); }
.btn { display: inline-block; padding: 12px 24px; border: none; border-radius: 10px; background: var(--primary); color: #fff; cursor: pointer; font-size: 15px; font-weight: 600; }
.btn:hover { background: var(--primary2); }
.btn.ghost { background: #fff; color: var(--primary); border: 1px solid var(--line); margin-left: 10px; }
.btn.ghost:hover { background: var(--accent-soft); }
.section { max-width: 1040px; margin: 0 auto; padding: 40px 28px; }
.section h2 { text-align: center; font-size: 26px; color: var(--primary); margin: 0 0 28px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.feature .ic { width: 40px; height: 40px; border-radius: 10px; background: var(--accent-soft); display: flex; align-items: center; justify-content: center; font-size: 20px; margin-bottom: 12px; }
.feature h3 { margin: 0 0 8px; font-size: 17px; color: var(--ink); }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }
.steps { display: flex; flex-direction: column; gap: 10px; max-width: 760px; margin: 0 auto; }
.step { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 10px; padding: 14px 18px; color: var(--ink); }
.note { text-align: center; color: var(--muted); font-size: 13px; margin-top: 24px; }
.footer { text-align: center; padding: 28px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); margin-top: 30px; }
.page { max-width: 980px; margin: 0 auto; padding: 26px 28px; }
.page h1 { font-size: 24px; color: var(--primary); margin: 0 0 18px; }
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--line); margin-bottom: 18px; }
.tab { padding: 10px 16px; border: none; background: transparent; cursor: pointer; font-size: 14px; color: var(--muted); }
.tab.active { color: var(--primary); font-weight: 600; border-bottom: 2px solid var(--accent); }
.panel { display: none; }
.panel.active { display: block; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
input, select, textarea { padding: 9px 11px; border: 1px solid #c7d2e0; border-radius: 8px; font-size: 14px; font-family: inherit; }
input.grow { flex: 1; min-width: 240px; }
.results { display: flex; flex-direction: column; gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.card h3 { margin: 0 0 8px; font-size: 16px; }
.chip { display: inline-block; padding: 3px 11px; border-radius: 14px; background: var(--accent-soft); color: #14706b; margin: 0 8px 6px 0; font-size: 13px; font-weight: 600; }
.prog { height: 10px; border-radius: 6px; background: var(--line); overflow: hidden; margin: 6px 0 4px; }
.prog_fill { height: 100%; background: linear-gradient(90deg, var(--primary2), var(--accent)); transition: width 0.4s ease; }
.muted { color: var(--muted); font-size: 13px; }
.ksec { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 12px; }
.ksec label { font-weight: 600; font-size: 13px; display: block; margin-bottom: 6px; color: var(--primary); }
.ksec textarea { width: 100%; min-height: 92px; font-family: ui-monospace, monospace; font-size: 13px; }
.reclist { display: flex; flex-direction: column; gap: 8px; }
.recrow { display: grid; grid-template-columns: 1fr 1fr auto; gap: 10px; align-items: center; padding: 12px 14px; background: #fff; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; }
.recrow:hover { border-color: var(--accent); }
.recrow.sel { border-color: var(--accent); background: var(--accent-soft); }
.rec_table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 13px; }
.rec_table th { text-align: left; color: var(--muted); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.rec_table td { padding: 6px 8px; border-bottom: 1px solid var(--line); }
.player { margin-top: 16px; }
.player video { width: 100%; max-height: 420px; border-radius: 12px; background: #000; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } .hero h1 { font-size: 30px; } }