:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-accent: #111933;
  --text: #eef2ff;
  --muted: #b7c0e8;
  --primary: #7c93ff;
  --primary-strong: #5f78f5;
  --border: #273156;
  --danger: #ff8a8a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg), #090d1a 35%, #070a14);
  color: var(--text);
  line-height: 1.5;
}

.hero {
  padding: 1.5rem 1rem 2rem;
  max-width: 1100px;
  margin: 0 auto;
}

.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.4px;
}

.price-pill {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-content {
  margin-top: 4rem;
  max-width: 700px;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-weight: 700;
}

h1 {
  margin: 0.5rem 0 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.15;
}

.subhead {
  color: var(--muted);
  font-size: 1.1rem;
  margin-top: 1rem;
}

.btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 1rem;
  color: var(--text);
  text-decoration: none;
  display: inline-block;
  font-weight: 600;
}

.btn-primary {
  background: var(--primary);
  border-color: transparent;
  color: #081033;
}

.btn-primary:hover {
  background: var(--primary-strong);
}

.btn-secondary,
.btn-ghost {
  background: transparent;
}

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.app-shell {
  padding-bottom: 1rem;
}

h2 {
  margin-top: 0;
}

.auth-panel,
.dashboard {
  background: var(--bg-accent);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.tabs {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin: 1rem 0;
}

.tab-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.5rem 0.85rem;
  cursor: pointer;
}

.tab-active {
  background: #18234a;
  color: var(--text);
}

.auth-form,
.deadline-form {
  display: grid;
  gap: 0.5rem;
  max-width: 420px;
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="date"] {
  border: 1px solid var(--border);
  background: #0e1430;
  color: var(--text);
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  width: 100%;
}

.form-message {
  color: var(--muted);
  min-height: 1.2rem;
}

.error {
  color: var(--danger);
}

.dashboard-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.status-strip {
  margin: 0.8rem 0 1.2rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.status-label {
  font-size: 0.9rem;
}

.dot {
  opacity: 0.7;
}

.deadline-list {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.deadline-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: center;
  background: #0d1533;
}

.deadline-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.helper {
  color: var(--muted);
  margin-top: 0;
}

.hidden {
  display: none;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 1rem 2rem;
  text-align: center;
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (max-width: 720px) {
  .dashboard-head {
    flex-direction: column;
    align-items: flex-start;
  }
}