:root{
  --bg:#F6F7F9; --card:#FFFFFF; --line:#E5E7EB; --line2:#F0F1F4;
  --ink:#111827; --ink2:#374151; --mute:#4B5563; --mute2:#6B7280;
  --accent:#4338CA; --accent-2:#3730A3; --accent-soft:#EEF2FF; --accent-tint:#E0E7FF;
  --ok:#166534; --ok-bg:#DCFCE7; --warn:#9A3412; --warn-bg:#FFF7ED; --warn-line:#FED7AA; --dot:#EA580C;
  --bad:#991B1B; --bad-bg:#FEE2E2;
  --radius:16px; --row:42px;
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-text-size-adjust:100%}
body{min-height:100vh}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--accent)}
h1,h2,h3{margin:0}
.hidden{display:none!important}

/* Yerleşim */
.view{max-width:1120px;margin:0 auto;padding:16px 16px calc(100px + var(--safe-b))}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.topbar .titles{display:flex;flex-direction:column;gap:2px;min-width:0}
.eyebrow{font-size:12px;font-weight:500;color:var(--mute)}
.title{font-size:21px;font-weight:700;letter-spacing:-.3px}
.row{display:flex;align-items:center;gap:8px}
.grow{flex:1 1 auto;min-width:0}
.stack{display:flex;flex-direction:column;gap:12px}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.muted{color:var(--mute)}
.small{font-size:12px}
.sec-title{font-size:15px;font-weight:700;margin:6px 0 0}

/* Alt menü / yan menü */
.nav{position:fixed;left:0;right:0;bottom:0;z-index:30;background:#fff;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);padding-bottom:var(--safe-b)}
.nav a{height:64px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;text-decoration:none;color:var(--mute);font-size:11px;font-weight:500}
.nav a.on{color:var(--accent);font-weight:600}
.nav svg{width:22px;height:22px}
@media (min-width:900px){
  .nav{top:0;right:auto;width:88px;grid-template-columns:1fr;grid-auto-rows:72px;align-content:start;padding-top:16px;border-top:0;border-right:1px solid var(--line)}
  .nav a{height:72px}
  .view{padding-left:112px;padding-bottom:32px}
  .fab{bottom:28px!important}
  .toast{bottom:28px!important;left:auto!important;right:96px!important;max-width:420px}
}

/* Bileşenler */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.card.warn{border-color:var(--warn-line)}
.iconbtn{width:44px;height:44px;flex:0 0 44px;border-radius:12px;border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;color:var(--ink2);cursor:pointer;text-decoration:none}
.iconbtn svg{width:18px;height:18px}
.btn{height:48px;padding:0 16px;border-radius:14px;border:1.5px solid var(--line);background:#fff;color:var(--ink);font-size:15px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:disabled{background:#9CA3AF;border-color:#9CA3AF;cursor:default}
.btn.danger{color:var(--bad);border-color:#FECACA}
.btn.ghost{border-color:transparent;background:transparent;color:var(--accent)}
.btn.sm{height:36px;font-size:13px;border-radius:999px;padding:0 12px}
.btn.block{width:100%}
.chip{height:36px;padding:0 12px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-size:13px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.chip.on{border-color:#6366F1;background:var(--accent-soft);color:var(--accent-2)}
.chip.dark.on{background:var(--ink);border-color:var(--ink);color:#fff}
.chip .av{width:26px;height:26px;border-radius:13px;font-size:11px;margin-left:-7px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:4px;background:#ECEEF2;padding:4px;border-radius:14px}
.seg button{height:38px;border-radius:10px;border:0;background:transparent;color:var(--mute);font-size:13px;font-weight:600;cursor:pointer}
.seg button.on{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(17,24,39,.12)}
.pill{display:inline-flex;align-items:center;font-size:11px;font-weight:600;padding:3px 9px;border-radius:999px;background:#F3F4F6;color:var(--ink2);white-space:nowrap}
.pill.ok{background:var(--ok-bg);color:var(--ok)}
.pill.warn{background:#FFEDD5;color:var(--warn)}
.pill.bad{background:var(--bad-bg);color:var(--bad)}
.pill.info{background:var(--accent-tint);color:var(--accent-2)}
.av{width:40px;height:40px;flex:0 0 auto;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.av.lg{width:60px;height:60px;border-radius:20px;font-size:24px}
.field{display:flex;flex-direction:column;gap:6px}
.field>span{font-size:12px;font-weight:600;color:var(--mute)}
.input{height:46px;border:1px solid #D1D5DB;border-radius:12px;padding:0 12px;font-size:16px;background:#fff;width:100%}
textarea.input{height:auto;min-height:90px;padding:10px 12px;resize:vertical}
.input:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}
.list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.li{display:flex;align-items:center;gap:12px;padding:12px 14px;border-top:1px solid var(--line2);text-decoration:none;color:inherit;background:#fff;width:100%;border-left:0;border-right:0;border-bottom:0;text-align:left;cursor:pointer}
.li:first-child{border-top:0}
.li .t{font-size:14px;font-weight:600}
.li .s{font-size:12px;color:var(--mute)}
.li .r{display:flex;flex-direction:column;align-items:flex-end;gap:4px}
.li .amt{font-size:14px;font-weight:700}
.kv{display:flex;justify-content:space-between;gap:12px;font-size:13px}
.kv span:first-child{color:var(--mute)}
.kv span:last-child{font-weight:600;text-align:right}
.bar{height:8px;border-radius:4px;background:#F3F4F6;overflow:hidden}
.bar>div{height:100%;background:#16A34A}
.switch{width:44px;height:26px;flex:0 0 44px;border-radius:13px;background:#D1D5DB;position:relative;transition:background .15s}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:10px;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:left .15s}
.switch.on{background:var(--accent)}
.switch.on::after{left:21px}
.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px;border:1px solid var(--line);border-radius:14px;background:#fff;padding:8px 14px;cursor:pointer;width:100%;text-align:left}
.notice{font-size:12.5px;font-weight:600;color:var(--warn);background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:10px;padding:8px 10px}
.empty{padding:28px 16px;text-align:center;color:var(--mute);font-size:14px}
.stat .lab{font-size:11px;font-weight:500;color:var(--mute)}
.stat .val{font-size:20px;font-weight:700}
.stat .sub{font-size:11px;color:var(--mute)}
.stat{padding:10px 12px;display:flex;flex-direction:column;gap:2px;text-decoration:none;color:inherit}

/* Haftalık takvim */
.wk{background:#fff;border:1px solid var(--line);border-radius:18px;padding:8px 6px 10px 0;margin-top:12px}
.wk-head,.wk-body{display:grid;grid-template-columns:34px repeat(7,minmax(0,1fr))}
.wk-day{display:flex;flex-direction:column;align-items:center;gap:2px;padding-bottom:6px}
.wk-day .dn{font-size:10px;font-weight:600;color:var(--mute);text-transform:uppercase}
.wk-day .dd{width:28px;height:28px;border-radius:14px;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center}
.wk-day.today .dd{background:var(--accent);color:#fff;font-weight:700}
.wk-times{position:relative}
.wk-times span{position:absolute;right:4px;font-size:9.5px;color:var(--mute2);transform:translateY(-50%)}
.wk-col{position:relative;border-left:1px solid var(--line2);background-image:linear-gradient(var(--line2) 1px,transparent 1px);background-size:100% var(--row)}
.wk-col.today{background-color:#F5F6FF}
.slot{position:absolute;left:0;right:0;height:var(--row);border:0;background:transparent;padding:0;cursor:copy}
.slot:hover{background:var(--accent-soft)}
.slot:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.lesson{position:absolute;box-sizing:border-box;border-radius:8px;border:1.5px solid;padding:3px 4px;text-align:left;cursor:grab;overflow:hidden;display:flex;flex-direction:column;gap:1px;font:inherit;touch-action:pan-y;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;z-index:2}
.lesson .n{font-size:10.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.lesson .h{font-size:10px;font-weight:500}
.lesson.planned,.lesson.postponed{background:#fff!important}
.lesson.postponed{border-style:dashed}
.lesson.cancel{opacity:.45}
.lesson.cancel .n{text-decoration:line-through}
.lesson.dragging{z-index:20;box-shadow:0 10px 24px rgba(17,24,39,.28);cursor:grabbing;opacity:.95}
.lesson .dot{position:absolute;top:4px;right:4px;width:7px;height:7px;border-radius:4px;background:var(--dot)}
.lesson .dot.partial{top:3px;right:3px;width:9px;height:9px;border:2px solid var(--dot);background:linear-gradient(90deg,var(--dot) 50%,#fff 50%)}
.ghost{position:absolute;left:2px;right:2px;border:1.5px dashed;border-radius:8px;pointer-events:none}
.draft{position:absolute;left:2px;right:2px;border:1.5px dashed var(--accent);background:var(--accent-soft);color:var(--accent-2);border-radius:8px;padding:3px 4px;font-size:10px;font-weight:600;pointer-events:none;z-index:3}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:11px;color:var(--mute);margin-top:8px;padding:0 4px}
.legend span{display:inline-flex;align-items:center;gap:5px}
.lg-box{width:10px;height:10px;border-radius:3px;border:1.5px solid #6366F1}
@media (min-width:900px){ :root{--row:48px} .lesson .n{font-size:12px} .lesson .h{font-size:11px} }

/* Alttan açılan panel */
.backdrop{position:fixed;inset:0;z-index:50;background:rgba(17,24,39,.45);display:flex;flex-direction:column;justify-content:flex-end;align-items:center;animation:fade .15s}
.sheet{width:100%;max-width:560px;max-height:92vh;overflow:auto;background:#fff;border-radius:24px 24px 0 0;padding:10px 20px calc(24px + var(--safe-b));display:flex;flex-direction:column;gap:14px;animation:up .18s ease-out}
.sheet .grip{width:40px;height:4px;border-radius:2px;background:#D1D5DB;align-self:center}
.sheet h3{font-size:17px;font-weight:700}
@media (min-width:700px){ .backdrop{justify-content:center} .sheet{border-radius:24px} }
@keyframes up{from{transform:translateY(30px);opacity:.6}to{transform:none;opacity:1}}
@keyframes fade{from{opacity:0}to{opacity:1}}

.fab{position:fixed;right:18px;bottom:calc(84px + var(--safe-b));z-index:25;width:56px;height:56px;border-radius:18px;border:0;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 20px rgba(67,56,202,.35)}
.fab svg{width:24px;height:24px}
.toast{position:fixed;left:16px;right:86px;bottom:calc(86px + var(--safe-b));z-index:60;background:var(--ink);color:#fff;border-radius:14px;padding:10px 12px;display:flex;align-items:center;gap:10px;box-shadow:0 8px 24px rgba(17,24,39,.25);font-size:13px;animation:up .18s}
.toast button{border:0;background:transparent;color:#A5B4FC;font-weight:700;cursor:pointer;padding:6px 4px}

/* Giriş */
.login{max-width:380px;margin:12vh auto 0;padding:0 16px}
.login .card{display:flex;flex-direction:column;gap:12px;padding:20px}
.err{background:#FEF2F2;color:var(--bad);border-radius:12px;padding:10px 12px;font-size:14px}

/* Ödeme */
.amount{display:flex;align-items:baseline;gap:6px;border-bottom:2px solid var(--accent);padding-bottom:6px}
.amount span{font-size:30px;font-weight:700;color:var(--mute)}
.amount input{flex:1 1 auto;min-width:0;border:0;outline:0;background:transparent;font-size:34px;font-weight:700;padding:0}
.success{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;padding-top:24px}
.success .ic{width:72px;height:72px;border-radius:36px;background:var(--ok-bg);color:#15803D;display:flex;align-items:center;justify-content:center}
.colors{display:flex;gap:8px;flex-wrap:wrap}
.colors button{width:36px;height:36px;border-radius:18px;border:3px solid #fff;box-shadow:0 0 0 1.5px var(--line);cursor:pointer}
.colors button.on{box-shadow:0 0 0 2.5px var(--ink)}
.spinner{padding:40px;text-align:center;color:var(--mute)}