/* muzix 導師 App — M1. Design tokens from mockup v10; flat #F8F9FA base (Patch 01 P1.1). */
:root{
  --ink:#0a0a0f;--ink-2:#4b4b57;--ink-3:#9a9aa6;
  --bg:#f8f9fa;--paper:#eef0f4;--card:#ffffff;--line:#e9e9ef;
  --violet:#5b4fcf;--violet-deep:#4a3fb8;--violet-tint:#efedfb;--violet-line:#ddd8f6;
  --alert:#c8503e;--alert-tint:#fbeeec;
  --ok:#2e7d5b;--ok-tint:#e9f4ef;
  --r:22px;
  --sans:"DM Sans","Noto Sans TC",-apple-system,system-ui,sans-serif;
  --serif:"Noto Serif TC",serif;
  --mono:"DM Mono",ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{background:#dcdce4;font-family:var(--sans);color:var(--ink);display:flex;justify-content:center}
.phone{width:100%;max-width:420px;background:var(--bg);min-height:100dvh;display:flex;flex-direction:column;position:relative;box-shadow:0 0 60px rgba(10,10,15,.16)}

/* ---------- generic ---------- */
.screen{flex:1;overflow-y:auto;padding-bottom:110px;display:none}
.screen.active{display:block}
.topbar{position:sticky;top:0;z-index:20;background:rgba(248,249,250,.86);backdrop-filter:blur(12px);padding:14px 18px 10px;border-bottom:1px solid var(--line);display:flex;align-items:center}
.brand{display:flex;align-items:center;gap:8px;width:100%}
.brand .logo{height:17px;width:auto;display:block}
.hex{width:18px;height:18px;background:var(--violet);clip-path:polygon(25% 5%,75% 5%,100% 50%,75% 95%,25% 95%,0% 50%)}
.role-tag{margin-left:auto;font-size:11px;font-weight:700;color:var(--violet);background:var(--violet-tint);border:1px solid var(--violet-line);padding:3px 10px;border-radius:999px;letter-spacing:.08em}
.linkbtn{background:none;border:none;color:var(--ink-3);font-family:var(--sans);font-size:12px;font-weight:700;cursor:pointer;padding:4px 8px}
.section{padding:18px 18px 0}
.sec-title{font-family:var(--serif);font-size:15px;font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:10px}
.sec-title .count{font-family:var(--mono);font-size:11px;color:var(--violet);background:var(--violet-tint);padding:1px 8px;border-radius:999px;font-weight:500}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:0 2px 10px rgba(10,10,15,.04)}
.btn{font-weight:700;border:none;border-radius:999px;cursor:pointer;transition:transform .06s,background .15s;font-family:var(--sans)}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--violet);color:#fff;padding:14px 18px;font-size:15px;width:100%}
.btn-primary:disabled{background:#c9c5e8;cursor:default}
.muted{color:var(--ink-3);font-size:12px}
.empty{padding:18px 16px;color:var(--ink-3);font-size:13px;text-align:center}
.spin{padding:40px 0;text-align:center;color:var(--ink-3);font-size:13px}

/* ---------- login ---------- */
#login{display:none;min-height:100dvh;flex-direction:column;justify-content:center;padding:28px 22px}
#login.active{display:flex}
.login-brand{display:flex;align-items:center;gap:9px;margin-bottom:26px}
.login-brand .logo{height:21px;width:auto;display:block}
.login-brand .role-tag{margin-left:0}
.login-card{background:var(--card);border:1px solid var(--line);border-radius:26px;padding:28px;box-shadow:0 8px 30px rgba(10,10,15,.06)}
.login-card h1{font-size:22px;letter-spacing:-.01em;margin-bottom:8px}
.login-card p.sub{font-size:13.5px;line-height:1.6;color:var(--ink-2);margin-bottom:20px}
.login-card label{display:block;font-size:12px;font-weight:700;color:var(--ink-2);margin-bottom:7px}
.login-card input{width:100%;border:1px solid var(--line);background:#fcfcfd;border-radius:14px;padding:14px 15px;font-size:15px;font-family:var(--sans);margin-bottom:16px;outline:none}
.login-card input:focus{border-color:var(--violet-line);box-shadow:0 0 0 3px var(--violet-tint)}
.note{margin-top:16px;font-size:12px;line-height:1.6;color:var(--ink-3)}
.flash{margin-top:16px;border-radius:14px;padding:13px 15px;font-size:13px;line-height:1.55;display:none}
.flash.show{display:block}
.flash.ok{background:var(--ok-tint);color:var(--ok)}
.flash.err{background:var(--alert-tint);color:var(--alert)}

/* ---------- home (今日) ---------- */
.greet{padding:22px 18px 0}
.greet .hi{font-size:24px;font-weight:500;color:var(--ink-3);line-height:1.25;letter-spacing:-.01em}
.greet h1{font-family:var(--sans);font-size:34px;font-weight:700;line-height:1.15;letter-spacing:-.02em;margin-top:2px}
.greet h1 .n{color:var(--violet)}
.greet .date{display:inline-flex;font-family:var(--mono);font-size:12px;color:var(--violet);background:var(--violet-tint);border:1px solid var(--violet-line);padding:6px 14px;border-radius:999px;margin-top:12px}
.alert-strip{margin:14px 18px 0;background:var(--alert-tint);border:1px solid #efcdc6;border-radius:18px;padding:12px 16px;display:flex;gap:10px;align-items:center}
.alert-strip .dot{width:9px;height:9px;border-radius:50%;background:var(--alert);flex:none;animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.alert-strip b{color:var(--alert);font-size:13.5px}
.alert-strip span{font-size:12px;color:var(--ink-2)}
.next-card{margin:18px 18px 0;background:#12101f;border-radius:28px;color:#fff;padding:24px 22px;position:relative;overflow:hidden;box-shadow:0 14px 34px rgba(18,16,31,.28)}
.next-card::after{content:"";position:absolute;right:-30px;top:-30px;width:150px;height:150px;background:var(--violet);opacity:.3;clip-path:polygon(25% 5%,75% 5%,100% 50%,75% 95%,25% 95%,0% 50%)}
.next-card .eyebrow{display:inline-block;font-size:11px;letter-spacing:.1em;color:#12101f;background:#cfc8ff;font-weight:700;margin-bottom:14px;padding:5px 12px;border-radius:999px}
.next-card .time{font-family:var(--mono);font-size:34px;letter-spacing:-.02em}
.next-card .who{font-size:18px;font-weight:700;margin-top:8px}
.next-card .where{font-size:13px;color:#b9b4d8;margin-top:3px}
.lesson-row{display:flex;align-items:center;gap:12px;padding:15px 16px;border-bottom:1px solid var(--line)}
.lesson-row:last-child{border-bottom:none}
.lesson-row .t{font-family:var(--mono);font-size:12px;color:var(--ink-2);background:var(--paper);border-radius:999px;padding:6px 10px;flex:none}
.lesson-row .mid{flex:1;min-width:0}
.lesson-row .nm{font-weight:700;font-size:14.5px}
.lesson-row .vn{font-size:12px;color:var(--ink-3);margin-top:1px}
.pill{margin-left:auto;font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;flex:none}
.pill.done{background:var(--ok-tint);color:var(--ok)}
.pill.todo{background:var(--violet-tint);color:var(--violet)}
.pill.overdue{background:var(--alert-tint);color:var(--alert)}
.pill.next{background:var(--ink);color:#fff}

/* day group (upcoming / timetable) */
.daygroup{padding:0 18px;margin-top:16px}
.dayhead{display:flex;align-items:center;gap:8px;margin:0 2px 8px}
.dayhead .d{font-family:var(--mono);font-size:13px;font-weight:500;color:var(--ink)}
.dayhead .wd{font-size:11px;color:var(--ink-3)}
.dayhead.today .d{color:var(--violet)}
.dayhead .todaytag{font-size:10px;font-weight:700;color:var(--violet);background:var(--violet-tint);padding:2px 8px;border-radius:999px;margin-left:auto}

/* ---------- tab bar ---------- */
.tabbar{position:fixed;bottom:14px;left:50%;transform:translateX(-50%);width:calc(100% - 32px);max-width:388px;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:999px;display:flex;z-index:30;padding:7px;box-shadow:0 8px 28px rgba(10,10,15,.14)}
.tab{flex:1;padding:10px 0;text-align:center;font-size:11.5px;color:var(--ink-3);cursor:pointer;font-weight:700;border-radius:999px;display:flex;align-items:center;justify-content:center;gap:6px;transition:.2s}
.tab .ico{font-size:16px;line-height:1;filter:grayscale(1);opacity:.55}
.tab.active{background:var(--ink);color:#fff}
.tab.active .ico{filter:none;opacity:1}
.tab.soon{opacity:.5}

/* stub tabs (學生/我的 — M2) */
.stub{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:90px 30px}
.stub .hex{width:34px;height:34px;margin-bottom:16px;opacity:.5}
.stub h2{font-family:var(--serif);font-size:20px;margin-bottom:6px}
.stub p{font-size:13px;color:var(--ink-3);line-height:1.6}