/* ─── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f0f13;
  --surface:   #1a1a24;
  --surface2:  #22222f;
  --border:    #2e2e40;
  --primary:   #6366f1;
  --primary-h: #4f46e5;
  --danger:    #ef4444;
  --danger-h:  #dc2626;
  --text:      #f1f1f5;
  --text-2:    #9898b0;
  --text-3:    #5e5e78;
  --radius:    12px;
  --radius-sm: 8px;
  --shadow:    0 4px 24px rgba(0,0,0,.4);
  --transition: 150ms ease;
}

html, body { height: 100%; font-family: 'Inter', system-ui, sans-serif; font-size: 15px; background: var(--bg); color: var(--text); }

a { color: var(--primary); text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; color: inherit; }
input { font-family: inherit; font-size: inherit; }
ul { list-style: none; }

/* ─── Logo ──────────────────────────────────────────────────── */
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; }
.logo--sm { font-size: .9rem; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .9rem;
  transition: background var(--transition), opacity var(--transition);
}
.btn--primary   { background: var(--primary); color: #fff; }
.btn--primary:hover { background: var(--primary-h); }
.btn--secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn--secondary:hover { background: var(--border); }
.btn--ghost     { background: transparent; color: var(--text-2); border: 1px solid var(--border); }
.btn--ghost:hover { color: var(--text); border-color: var(--text-3); }
.btn--full      { width: 100%; justify-content: center; }
.btn--sm        { padding: 7px 14px; font-size: .82rem; }
.btn:disabled   { opacity: .45; pointer-events: none; }

/* ─── Forms ─────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: .82rem; color: var(--text-2); font-weight: 500; }
.form-group input {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
  color: var(--text); outline: none;
  transition: border-color var(--transition);
}
.form-group input:focus { border-color: var(--primary); }
.form-group input::placeholder { color: var(--text-3); }

/* ─── Error message ─────────────────────────────────────────── */
.error-msg { color: #f87171; font-size: .83rem; text-align: center; margin-top: 8px; }

/* ─── Spinner ───────────────────────────────────────────────── */
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Overlay ───────────────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0; background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.overlay--error { background: rgba(15,15,19,.95); }
.overlay__inner { display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; }
.overlay__inner p { color: var(--text-2); }

/* ─── Utility ───────────────────────────────────────────────── */
.hidden { display: none !important; }
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 18px; height: 18px; padding: 0 5px;
  background: var(--surface2); border-radius: 9px;
  font-size: .72rem; font-weight: 700;
}
.badge--red { background: var(--danger); color: #fff; }

/* ─── Landing page ──────────────────────────────────────────── */
.landing { min-height: 100%; display: flex; flex-direction: column; }

.landing__header {
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
}

.landing__main {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 48px 16px; gap: 40px;
}

.hero { text-align: center; }
.hero__title { font-size: 2.6rem; font-weight: 800; line-height: 1.15; letter-spacing: -.02em; }
.hero__sub { margin-top: 12px; color: var(--text-2); font-size: 1rem; }

/* ─── Card (home) ───────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 20px;
}

/* ─── Tabs ──────────────────────────────────────────────────── */
.tabs {
  display: flex; gap: 4px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
  padding: 4px;
}
.tab {
  flex: 1; padding: 8px; border-radius: 6px;
  font-size: .88rem; font-weight: 600; color: var(--text-2);
  transition: background var(--transition), color var(--transition);
}
.tab--active { background: var(--surface); color: var(--text); }

.tab-panel { display: flex; flex-direction: column; gap: 16px; }