/* ---------------------------------------------------------------------------
   NQPT brand system
   Slate graphite surfaces + electric lime action.
   --------------------------------------------------------------------------- */
:root {
  --ink-950: #0c1210;
  --ink-900: #111a16;
  --ink-850: #16211c;
  --ink-800: #1c2923;
  --ink-700: #2a3a32;
  --paper: #f4f6f2;
  --paper-2: #ffffff;
  --muted: #ffffff;
  --line: #e3e8e1;
  --line-dark: rgba(255,255,255,.12);
  --text: #17251e;
  --text-dim: #5b6b61;
  --accent: #b8e62e;
  --accent-strong: #8fc20f;
  --accent-ink: #1a2a08;
  --accent-soft: rgba(184,230,46,.16);
  --danger: #dc2626;
  --danger-soft: rgba(220,38,38,.1);
  --warn: #d97706;
  --warn-soft: rgba(217,119,6,.12);
  --ok: #15803d;
  --ok-soft: rgba(21,128,61,.1);
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 10px 30px rgba(12,18,16,.08);
  --shadow-lg: 0 24px 60px rgba(12,18,16,.16);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --display: "Sora", "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.15; margin: 0; letter-spacing: -.01em; }
p { margin: 0; }

.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 64px 0; }
.muted { color: var(--text-dim); }
.small { font-size: .88rem; }
.hidden { display: none !important; }

/* ------------------------------ Top bar ------------------------------ */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(244,246,242,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #33463c, var(--ink-950));
  color: var(--accent); font-family: var(--display); font-weight: 800; font-size: 18px;
  box-shadow: var(--shadow);
}
.brand-name { font-family: var(--display); font-weight: 800; font-size: 22px; letter-spacing: .02em; }
.brand-sub { color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: .14em; font-weight: 700; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  text-decoration: none; padding: 9px 14px; border-radius: 999px;
  font-weight: 600; font-size: 14px; color: var(--text);
}
.nav a:hover { background: rgba(12,18,16,.06); }
.nav a.active { background: var(--ink-950); color: #fff; }
.nav .btn { margin-left: 8px; }
.nav-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 8px 11px; cursor: pointer; }

/* ------------------------------ Buttons ------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid transparent; border-radius: 999px;
  padding: 11px 20px; font-weight: 700; font-size: 14px;
  cursor: pointer; text-decoration: none; transition: transform .08s, background .15s, border-color .15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--ink-950); }
.btn-primary:hover { background: #c9f048; }
.btn-dark { background: var(--ink-950); color: #fff; }
.btn-dark:hover { background: var(--ink-800); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { background: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* ------------------------------ Hero ------------------------------ */
.hero {
  background:
    radial-gradient(700px 320px at 85% -10%, rgba(184,230,46,.22), transparent 60%),
    radial-gradient(600px 300px at 0% 0%, rgba(184,230,46,.12), transparent 55%),
    linear-gradient(180deg, var(--ink-950), var(--ink-900));
  color: #fff; padding: 72px 0 64px;
}
.hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(38px, 6vw, 64px); letter-spacing: -.03em; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero p.lead { margin-top: 16px; color: rgba(255,255,255,.78); font-size: 18px; max-width: 560px; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.hero-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg); padding: 24px; backdrop-filter: blur(6px);
}
.hero-card h3 { font-size: 15px; text-transform: uppercase; letter-spacing: .12em; color: var(--accent); }
.hero-stat { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
.hero-stat:last-child { border-bottom: 0; }
.hero-stat b { font-family: var(--display); font-size: 22px; }

/* ------------------------------ Cards ------------------------------ */
.card {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
}
.card-pad { padding: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.feature-icon { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: var(--ink-950); color: var(--accent); font-size: 22px; margin-bottom: 14px; }

.section-title { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -.02em; }
.kicker { font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--accent-strong); margin-bottom: 10px; }

/* ------------------------------ Timetable ------------------------------ */
.day-tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 18px; scrollbar-width: thin; }
.day-tab {
  border: 1px solid var(--line); background: var(--paper-2); border-radius: 12px;
  padding: 10px 14px; cursor: pointer; font-weight: 700; font-size: 13px; white-space: nowrap;
  display: grid; gap: 1px; text-align: center; min-width: 88px;
}
.day-tab small { font-weight: 600; color: var(--text-dim); font-size: 11px; }
.day-tab.active { background: var(--ink-950); color: #fff; border-color: var(--ink-950); }
.day-tab.active small { color: var(--accent); }
.day-tab .count { display:inline-block; margin-top:2px; font-size:11px; background:var(--accent); color:var(--ink-950); border-radius:999px; padding:1px 7px; font-weight:800; }

.class-list { display: grid; gap: 14px; }
.class-card {
  display: grid; grid-template-columns: 96px 1fr auto; gap: 18px; align-items: center;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 18px 20px; box-shadow: var(--shadow);
}
.class-time { text-align: center; }
.class-time .t { font-family: var(--display); font-weight: 800; font-size: 17px; }
.class-time .d { color: var(--text-dim); font-size: 12px; font-weight: 700; }
.class-name { font-family: var(--display); font-weight: 800; font-size: 18px; }
.class-meta { color: var(--text-dim); font-size: 13px; margin-top: 3px; display: flex; gap: 12px; flex-wrap: wrap; }
.avail { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 700; margin-top: 6px; }
.avail-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ok); }
.avail.low .avail-dot { background: var(--warn); }
.avail.full .avail-dot { background: var(--danger); }
.class-actions { display: grid; gap: 8px; justify-items: end; }
.badge { display:inline-flex; align-items:center; border-radius:999px; padding:3px 10px; font-size:11px; font-weight:800; letter-spacing:.04em; }
.badge-member { background: var(--ink-950); color: var(--accent); }
.badge-guest { background: var(--accent-soft); color: var(--accent-ink); }
.badge-full { background: var(--danger-soft); color: var(--danger); }
.badge-booked { background: var(--ok-soft); color: var(--ok); }
.badge-wait { background: var(--warn-soft); color: var(--warn); }
.empty-state {
  border: 1px dashed var(--line); background: var(--paper-2); border-radius: var(--radius-lg);
  padding: 40px 24px; text-align: center; color: var(--text-dim);
}

/* ------------------------------ Forms ------------------------------ */
.form { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; }
.field label { font-size: 13px; font-weight: 700; color: var(--text); }
.field input, .field select, .field textarea {
  border: 1px solid var(--line); border-radius: 11px; padding: 11px 13px; background: #fff; width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent-strong);
}
.field .hint { color: var(--text-dim); font-size: 12px; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.auth-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; background: #eef2ec; border-radius: 12px; padding: 4px; margin-bottom: 18px; }
.tabs button { border: 0; background: transparent; padding: 10px; border-radius: 9px; font-weight: 700; cursor: pointer; }
.tabs button.active { background: var(--ink-950); color: #fff; }
.alert { border-radius: 12px; padding: 12px 14px; font-size: 14px; font-weight: 600; display:none; }
.alert.show { display: block; }
.alert-error { background: var(--danger-soft); color: #7f1d1d; }
.alert-ok { background: var(--ok-soft); color: #14532d; }
.alert-info { background: var(--accent-soft); color: var(--accent-ink); }

/* ------------------------------ Tables ------------------------------ */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; }
table { border-collapse: collapse; width: 100%; min-width: 640px; font-size: 14px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); }
th { background: #f7faf5; font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--text-dim); }
tr:last-child td { border-bottom: 0; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: #f4f8f0; }

/* ------------------------------ Modal ------------------------------ */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(12,18,16,.55);
  display: none; place-items: center; z-index: 80; padding: 18px;
}
.modal-backdrop.open { display: grid; }
.modal {
  width: min(640px, 100%); max-height: min(86vh, 900px); overflow: auto;
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 26px;
}
.modal h2 { font-size: 22px; }
.modal-head { display: flex; justify-content: space-between; gap: 12px; align-items: start; margin-bottom: 14px; }
.icon-btn { border: 1px solid var(--line); background: #fff; width: 36px; height: 36px; border-radius: 10px; cursor: pointer; font-size: 16px; }

/* ------------------------------ Toasts ------------------------------ */
.toast-region { position: fixed; right: 16px; bottom: 16px; z-index: 120; display: grid; gap: 10px; width: min(380px, calc(100vw - 32px)); }
.toast { background: var(--ink-950); color: #fff; border-radius: 12px; padding: 13px 15px; box-shadow: var(--shadow-lg); font-weight: 600; font-size: 14px; }
.toast.ok { border-left: 5px solid var(--accent); }
.toast.err { border-left: 5px solid #f87171; }

/* ------------------------------ Admin ------------------------------ */
.admin-layout { display: grid; grid-template-columns: 230px 1fr; gap: 22px; align-items: start; }
.admin-side { position: sticky; top: 88px; }
.admin-side .nav-v { display: grid; gap: 4px; }
.admin-side .nav-v button {
  text-align: left; border: 0; background: transparent; padding: 10px 12px; border-radius: 11px; font-weight: 700; cursor: pointer;
}
.admin-side .nav-v button.active { background: var(--ink-950); color: var(--accent); }
.admin-side .nav-v button:hover { background: #eef2ec; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat { padding: 18px; }
.stat .v { font-family: var(--display); font-size: 30px; font-weight: 800; }
.stat .k { color: var(--text-dim); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.toolbar input, .toolbar select { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; background: #fff; }
.toolbar .spacer { flex: 1; }

/* ------------------------------ Footer ------------------------------ */
footer { background: var(--ink-950); color: rgba(255,255,255,.78); padding: 44px 0; margin-top: 20px; }
footer .brand-name { color: #fff; }
footer a { color: var(--accent); text-decoration: none; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 28px; }

/* ------------------------------ Misc ------------------------------ */
.divider { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.pill { display:inline-flex; align-items:center; gap:6px; padding:4px 10px; border-radius:999px; background:#eef2ec; font-size:12px; font-weight:700; }
.row { display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.mt { margin-top: 16px; } .mb { margin-bottom: 16px; }
.progress { height: 8px; border-radius: 99px; background: #e6ece3; overflow: hidden; min-width: 110px; }
.progress span { display:block; height:100%; background: var(--accent-strong); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .auth-layout { grid-template-columns: 1fr; }
  .grid-3, .grid-2, .stat-grid { grid-template-columns: 1fr 1fr; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-side { position: static; }
  .nav { display: none; width: 100%; }
  .nav.open { display: grid; position: absolute; left: 0; right: 0; top: 68px; background: var(--paper); padding: 12px; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: block; }
  .topbar-inner { position: relative; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 44px 0; }
  .class-card { grid-template-columns: 1fr; }
  .class-time { text-align: left; display: flex; gap: 10px; align-items: baseline; }
  .class-actions { justify-items: stretch; }
  .class-actions .btn { width: 100%; }
  .grid-3, .grid-2, .stat-grid, .form-grid-2 { grid-template-columns: 1fr; }
  .brand-sub { display: none; }
}