:root {
  --bg0: #08080f;
  --bg1: #0d0d18;
  --bg2: #12121f;
  --bg3: #1a1a2e;
  --bg4: #1f1f38;
  --border: rgba(255,255,255,0.07);
  --border-mid: rgba(255,255,255,0.12);
  --purple: #9d4edd;
  --purple-bright: #b76ef5;
  --purple-dim: rgba(157,78,221,0.15);
  --green: #1de9b6;
  --green-dim: rgba(29,233,182,0.12);
  --pink: #f06292;
  --pink-dim: rgba(240,98,146,0.14);
  --amber: #ffc107;
  --text: #e8e8f0;
  --text-muted: rgba(232,232,240,0.45);
  --text-dim: rgba(232,232,240,0.25);
  --radius: 12px;
  --radius-sm: 8px;
  --font-mono: 'Space Mono', monospace;
  --font: 'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg0);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* SCREENS */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; flex-direction: column; }

/* ─── LOGIN ─── */
.login-bg {
  position: fixed; inset: 0; z-index: 0;
  overflow: hidden;
  background: var(--bg0);
}
.login-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(157,78,221,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157,78,221,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
}
.login-glow {
  position: absolute;
  width: 600px; height: 600px;
  top: -200px; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, rgba(157,78,221,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.login-content {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; flex: 1;
  padding: 24px;
}
.login-logo {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 40px;
}
.logo-mark {
  font-size: 40px;
  filter: drop-shadow(0 0 16px rgba(157,78,221,0.7));
  animation: pulse-glow 3s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%,100% { filter: drop-shadow(0 0 12px rgba(157,78,221,0.6)); }
  50% { filter: drop-shadow(0 0 24px rgba(183,110,245,0.9)); }
}
.logo-name {
  font-family: var(--font-mono);
  font-size: 28px; font-weight: 700;
  color: #fff;
  letter-spacing: -1px;
}
.logo-tagline {
  font-size: 12px; color: var(--text-muted);
  letter-spacing: 0.05em;
}
.login-card {
  background: var(--bg2);
  border: 1px solid var(--border-mid);
  border-radius: 16px;
  padding: 32px;
  width: 100%; max-width: 380px;
  box-shadow: 0 0 60px rgba(157,78,221,0.1);
}
.login-card-header { margin-bottom: 24px; }
.login-card-header h1 { font-size: 22px; font-weight: 600; color: #fff; margin-bottom: 6px; }
.login-card-header p { font-size: 13px; color: var(--text-muted); }

/* FORMS */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 8px; }
.form-group input,
.form-group select {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 14px; color: var(--text);
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s;
  color-scheme: dark;
}
.form-group input:focus,
.form-group select:focus { border-color: var(--purple); }
.form-group input::placeholder { color: var(--text-dim); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* BUTTONS */
.btn-primary {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%;
  background: var(--purple);
  color: #fff;
  border: none; border-radius: var(--radius-sm);
  padding: 12px 20px;
  font-size: 14px; font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--purple-bright); }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--bg4);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 20px;
  font-size: 14px;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--bg3); }

.btn-add {
  display: flex; align-items: center; gap: 6px;
  background: var(--purple-dim);
  color: var(--purple-bright);
  border: 1px solid rgba(157,78,221,0.3);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-size: 13px; font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-add:hover { background: rgba(157,78,221,0.25); }

.error-msg {
  font-size: 12px; color: #ff6b6b;
  background: rgba(255,107,107,0.1);
  border: 1px solid rgba(255,107,107,0.2);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 12px;
}
.hidden { display: none !important; }

.invite-badge {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-top: 16px;
  font-size: 12px; color: var(--text-dim);
}

/* ─── NAVBAR ─── */
.navbar {
  background: var(--bg1);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 20px;
  height: 56px;
  position: sticky; top: 0; z-index: 100;
}
.nav-logo {
  display: flex; align-items: center; gap: 8px;
  min-width: 120px;
}
.logo-mark-sm { font-size: 20px; }
.nav-brand {
  font-family: var(--font-mono);
  font-size: 15px; font-weight: 700;
  color: #fff;
}
.nav-tabs {
  display: flex; align-items: center;
  flex: 1; justify-content: center;
  gap: 4px;
}
.nav-tab {
  display: flex; align-items: center; gap: 6px;
  background: none; border: none;
  color: var(--text-muted);
  padding: 8px 16px;
  font-size: 13px; font-weight: 500;
  font-family: var(--font);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  border-bottom: 2px solid transparent;
}
.nav-tab:hover { color: var(--text); background: var(--bg3); }
.nav-tab.active { color: var(--purple-bright); border-bottom-color: var(--purple-bright); background: var(--purple-dim); }

.nav-user {
  display: flex; align-items: center; gap: 8px;
  min-width: 120px; justify-content: flex-end;
  font-size: 13px; font-weight: 500;
}
.user-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px var(--green);
}

/* ─── TABS ─── */
.tab-content { display: none; flex: 1; }
.tab-content.active { display: block; }

.page-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: 13px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* CHECKIN BUTTON */
.checkin-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%;
  background: var(--green-dim);
  color: var(--green);
  border: 1px solid rgba(29,233,182,0.25);
  border-radius: var(--radius);
  padding: 14px;
  font-size: 15px; font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  letter-spacing: 0.01em;
}
.checkin-btn:hover { background: rgba(29,233,182,0.2); }
.checkin-btn:active { transform: scale(0.99); }
.checkin-btn.checked-in {
  background: var(--green-dim);
  border-color: var(--green);
  color: var(--green);
}

/* WEEK GRID */
.week-nav { display: flex; align-items: center; gap: 10px; }
.week-nav button {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text-muted); border-radius: 6px;
  width: 28px; height: 28px;
  cursor: pointer; font-size: 11px;
  display: flex; align-items: center; justify-content: center;
}
.week-nav button:hover { border-color: var(--purple); color: var(--purple-bright); }
#weekLabel { font-size: 12px; color: var(--text-muted); font-family: var(--font-mono); min-width: 40px; text-align: center; }

.week-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}
.day-col {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 6px;
  text-align: center;
  transition: border-color 0.15s;
}
.day-col.is-today { border-color: rgba(29,233,182,0.4); }
.day-col.has-me { border-color: rgba(157,78,221,0.5); background: rgba(157,78,221,0.06); }
.day-name { font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 8px; }
.day-date { font-family: var(--font-mono); font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.day-dots { display: flex; flex-wrap: wrap; justify-content: center; gap: 3px; min-height: 10px; }
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  title: attr(title);
}

/* MEMBER LIST */
.member-list { display: flex; flex-direction: column; gap: 8px; }
.member-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  transition: border-color 0.15s;
}
.member-row:hover { border-color: var(--border-mid); }
.mem-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; color: #fff;
  flex-shrink: 0;
  font-family: var(--font-mono);
}
.mem-info { flex: 1; }
.mem-name { font-size: 14px; font-weight: 500; color: var(--text); }
.mem-sub { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.badge {
  font-size: 11px; padding: 3px 10px; border-radius: 20px;
  font-weight: 500; white-space: nowrap;
}
.badge-going { background: var(--purple-dim); color: var(--purple-bright); border: 1px solid rgba(157,78,221,0.25); }
.badge-done { background: var(--green-dim); color: var(--green); border: 1px solid rgba(29,233,182,0.2); }
.badge-fire { background: rgba(255,193,7,0.12); color: var(--amber); border: 1px solid rgba(255,193,7,0.2); }
.badge-off { background: var(--bg3); color: var(--text-dim); border: 1px solid var(--border); }

/* EVENTS */
.events-list { display: flex; flex-direction: column; gap: 10px; }
.event-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--purple);
  border-radius: var(--radius);
  padding: 16px;
  display: flex; gap: 16px; align-items: flex-start;
}
.event-card.type-party { border-left-color: var(--pink); }
.event-card.type-gym { border-left-color: var(--green); }
.event-card.type-other { border-left-color: var(--amber); }

.event-date-box { text-align: center; min-width: 44px; }
.event-day { font-family: var(--font-mono); font-size: 24px; font-weight: 700; color: #fff; line-height: 1; }
.event-mon { font-size: 10px; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.06em; }

.event-body { flex: 1; }
.event-title-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; flex-wrap: wrap; }
.event-name { font-size: 15px; font-weight: 500; color: var(--text); }
.event-type-tag {
  font-size: 10px; padding: 2px 8px; border-radius: 10px;
  font-weight: 500;
}
.tag-party { background: var(--pink-dim); color: var(--pink); }
.tag-gym { background: var(--green-dim); color: var(--green); }
.tag-other { background: rgba(255,193,7,0.1); color: var(--amber); }

.event-meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 14px; flex-wrap: wrap; }
.event-meta i { margin-right: 4px; }

.event-attendees { display: flex; align-items: center; gap: 4px; margin-top: 10px; }
.att-dot {
  width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 9px; font-weight: 700; color: #fff;
  border: 2px solid var(--bg2);
  margin-left: -4px;
  font-family: var(--font-mono);
}
.att-dot:first-child { margin-left: 0; }
.att-count { font-size: 11px; color: var(--text-muted); margin-left: 6px; }

.rsvp-btns { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; }
.rsvp-btn {
  font-size: 12px; padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font);
  white-space: nowrap;
  transition: all 0.15s;
}
.rsvp-btn:hover, .rsvp-btn.active-going { background: var(--purple-dim); color: var(--purple-bright); border-color: rgba(157,78,221,0.3); }
.rsvp-btn.active-maybe { background: rgba(255,193,7,0.1); color: var(--amber); border-color: rgba(255,193,7,0.2); }
.del-btn {
  background: none; border: none; color: var(--text-dim);
  cursor: pointer; font-size: 11px; padding: 4px;
}
.del-btn:hover { color: #ff6b6b; }

/* STATS */
.stats-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-bottom: 24px; }
.stat-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.stat-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); margin-bottom: 8px; }
.stat-value { font-family: var(--font-mono); font-size: 26px; font-weight: 700; }
.stat-value.purple { color: var(--purple-bright); }
.stat-value.green { color: var(--green); }
.stat-value.pink { color: var(--pink); }

/* MODAL */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex; align-items: center; justify-content: center;
  z-index: 200; padding: 20px;
  backdrop-filter: blur(4px);
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--bg2);
  border: 1px solid var(--border-mid);
  border-radius: 16px;
  padding: 24px;
  width: 100%; max-width: 420px;
  box-shadow: 0 0 80px rgba(157,78,221,0.15);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 6px;
}
.modal-header h3 { font-size: 16px; font-weight: 600; color: #fff; display: flex; align-items: center; gap: 8px; }
.modal-close {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 16px; padding: 4px;
}
.modal-close:hover { color: var(--text); }
.modal-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }
.modal-footer { display: flex; gap: 10px; margin-top: 20px; }
.modal-footer .btn-primary { flex: 1; }
.modal-footer .btn-secondary { flex: 1; }

.time-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 16px; }
.time-opt {
  display: flex; align-items: center; gap: 8px; justify-content: center;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 11px;
  font-size: 13px; color: var(--text-muted);
  cursor: pointer; transition: all 0.15s;
}
.time-opt:hover { border-color: var(--purple); color: var(--text); }
.time-opt.selected { border-color: var(--purple); color: var(--purple-bright); background: var(--purple-dim); }

/* EMPTY STATE */
.empty-state {
  text-align: center; padding: 40px 20px;
  color: var(--text-dim); font-size: 14px;
}
.empty-state i { font-size: 32px; margin-bottom: 12px; display: block; }

/* LOADING */
.loading { text-align: center; padding: 40px; color: var(--text-dim); }

/* MOBILE */
@media (max-width: 600px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .week-grid { gap: 4px; }
  .day-col { padding: 8px 3px; }
  .day-date { display: none; }
  .nav-tab span { display: none; }
  .nav-tab { padding: 8px 14px; }
  .nav-user { min-width: auto; }
  .form-row { grid-template-columns: 1fr; }
  .event-card { flex-wrap: wrap; }
  .rsvp-btns { flex-direction: row; }
}

/* ADMIN */
.admin-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.invite-url {
  font-size: 11px;
  color: var(--purple-bright);
  font-family: var(--font-mono);
  margin-top: 6px;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 300px;
}
.invite-url:hover { text-decoration: underline; }

.copy-btn {
  font-size: 11px; padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font);
}
.copy-btn:hover { border-color: var(--purple); color: var(--purple-bright); }

.admin-crown { font-size: 12px; }

/* TOAST */
.toast {
  position: fixed;
  bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--bg3);
  border: 1px solid var(--border-mid);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 20px;
  font-size: 13px;
  opacity: 0;
  transition: all 0.25s;
  z-index: 999;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ADMIN PANEL */
.admin-card { background:var(--bg2); border:1px solid var(--border); border-radius:var(--radius); padding:20px; }
.invite-url { font-size:11px; color:var(--purple-bright); font-family:var(--font-mono); margin-top:6px; cursor:pointer; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; max-width:340px; }
.invite-url:hover { text-decoration:underline; }
.copy-btn { font-size:11px; padding:4px 10px; border-radius:var(--radius-sm); border:1px solid var(--border); background:var(--bg3); color:var(--text-muted); cursor:pointer; font-family:var(--font); transition:all 0.15s; }
.copy-btn:hover { border-color:var(--purple); color:var(--purple-bright); }

/* GHOST BUTTON */
.btn-ghost { display:flex; align-items:center; justify-content:center; gap:8px; background:none; border:1px solid var(--border); border-radius:var(--radius-sm); padding:8px 16px; font-size:13px; color:var(--text-muted); font-family:var(--font); cursor:pointer; transition:all 0.15s; }
.btn-ghost:hover { border-color:var(--border-mid); color:var(--text); }

/* YOU TAG */
.you-tag { font-size:11px; color:var(--text-dim); font-weight:400; }

/* TOAST */
.toast { position:fixed; bottom:24px; left:50%; transform:translateX(-50%) translateY(20px); background:var(--bg3); border:1px solid var(--border-mid); color:var(--text); padding:10px 20px; border-radius:20px; font-size:13px; opacity:0; transition:all 0.25s; z-index:999; white-space:nowrap; pointer-events:none; }
.toast.show { opacity:1; transform:translateX(-50%) translateY(0); }

.login-divider { display:flex; align-items:center; gap:12px; margin:16px 0; }
.login-divider::before, .login-divider::after { content:''; flex:1; height:1px; background:var(--border); }
.login-divider span { font-size:12px; color:var(--text-dim); }

.del-btn-red { display:flex; align-items:center; gap:6px; font-size:12px; padding:6px 12px; border-radius:var(--radius-sm); border:1px solid rgba(255,107,107,0.3); background:rgba(255,107,107,0.08); color:#ff6b6b; cursor:pointer; font-family:var(--font); white-space:nowrap; transition:all 0.15s; flex-shrink:0; }
.del-btn-red:hover { background:rgba(255,107,107,0.18); border-color:rgba(255,107,107,0.5); }