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

:root {
  --bg:        #06080f;
  --surface:   #0d1120;
  --border:    #1e2640;
  --accent:    #4fffb0;
  --accent2:   #6c8cff;
  --warn:      #ffb347;
  --err:       #ff5f5f;
  --text:      #e8eaf6;
  --muted:     #7b82a8;
  --font-disp: 'DM Serif Display', serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  overflow-x: hidden;
}

/* ── Grid background ──────────────────────────────────────────────────────── */
.grid-bg {
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(78,255,176,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78,255,176,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

/* ── Container ────────────────────────────────────────────────────────────── */
.container {
  position: relative; z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* ── Top bar ──────────────────────────────────────────────────────────────── */
.topbar {
  display: flex; align-items: center; gap: .6rem;
  padding-top: .5rem;
}
.logo-mark { font-size: 1.4rem; color: var(--accent); }
.logo-text  {
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ── Hero ─────────────────────────────────────────────────────────────────── */
.hero { display: flex; flex-direction: column; gap: 1.4rem; padding-top: 2rem; }

.badge {
  display: inline-flex; align-items: center;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 100px;
  padding: .28rem .9rem;
  width: fit-content;
}

.headline {
  font-family: var(--font-disp);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.1;
  color: var(--text);
}
.headline em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sub {
  max-width: 500px;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ── Warning / error boxes ────────────────────────────────────────────────── */
.warning-box {
  display: flex; gap: 1rem; align-items: flex-start;
  background: rgba(255,179,71,.08);
  border: 1px solid rgba(255,179,71,.3);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  font-size: .88rem;
  line-height: 1.6;
  color: var(--warn);
  max-width: 520px;
}
.error-box {
  background: rgba(255,95,95,.08);
  border-color: rgba(255,95,95,.3);
  color: var(--err);
}
.warn-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: .05rem; }
code {
  font-family: var(--font-mono);
  font-size: .83em;
  background: rgba(255,255,255,.07);
  padding: .1em .4em;
  border-radius: 4px;
}

/* ── Login button ─────────────────────────────────────────────────────────── */
.login-btn {
  display: inline-flex; align-items: center; gap: .65rem;
  background: var(--accent);
  color: #06080f;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: .95rem;
  padding: .8rem 1.8rem;
  border-radius: 8px;
  text-decoration: none;
  width: fit-content;
  transition: opacity .2s, transform .15s;
  letter-spacing: .01em;
}
.login-btn:hover  { opacity: .88; transform: translateY(-1px); }
.login-btn:active { transform: translateY(0); }
.login-btn.disabled {
  background: var(--border);
  color: var(--muted);
  cursor: not-allowed;
}
.login-btn svg { flex-shrink: 0; }

.hint {
  font-size: .78rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* ── Features ─────────────────────────────────────────────────────────────── */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.feat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem 1.4rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  transition: border-color .2s;
}
.feat-card:hover { border-color: rgba(78,255,176,.3); }
.feat-icon { font-size: 1.6rem; }
.feat-card h3 {
  font-family: var(--font-disp);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text);
}
.feat-card p {
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */
.footer {
  font-size: .75rem;
  color: var(--muted);
  font-family: var(--font-mono);
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}