/* Dumu landing + auth — temporary styles. Will be redesigned later. */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --fg: #14181f;
  --muted: #5b6472;
  --border: #e5e7ee;
  --primary: #3457d5;
  --primary-fg: #ffffff;
  --primary-hover: #2a47b0;
  --danger: #c0392b;
  --radius: 10px;
  --maxw: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; }
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); }
h3 { font-size: 1.1rem; }

p { margin: 0 0 1em; }

.muted { color: var(--muted); }
.small { font-size: 0.875rem; }

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.15rem; color: var(--fg);
}
.brand img { width: 28px; height: 28px; }
.brand:hover { text-decoration: none; }

.nav-links {
  display: flex; align-items: center; gap: 20px;
}
.nav-links a { color: var(--fg); font-weight: 500; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: transparent;
  color: var(--fg);
  font-family: inherit; font-size: 0.95rem; font-weight: 600;
  cursor: pointer; text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--primary-fg); }
.btn-primary:hover { background: var(--primary-hover); color: var(--primary-fg); }
.btn-ghost { border-color: var(--border); color: var(--fg); background: var(--bg); }
.btn-ghost:hover { background: var(--bg-soft); }
.btn-lg { padding: 14px 24px; font-size: 1rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Hero */
.hero {
  padding: 80px 32px 60px;
  background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
}
.hero-inner {
  max-width: var(--maxw); margin: 0 auto; text-align: center;
}
.lead {
  max-width: 720px; margin: 0 auto 28px;
  font-size: 1.15rem; color: var(--muted);
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 18px; }
.hero-note { color: var(--muted); font-size: 0.9rem; }

/* Features */
.features {
  padding: 60px 32px;
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 32px;
  text-align: left;
}
.feature {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.feature h3 { margin-bottom: 6px; }
.feature p { color: var(--muted); margin: 0; }

/* CTA */
.cta {
  padding: 70px 32px;
  text-align: center;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta p { color: var(--muted); margin-bottom: 24px; }

/* Footer */
.footer {
  padding: 30px 32px;
  background: var(--bg);
}
.footer-inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  color: var(--muted); font-size: 0.9rem;
}
.footer strong { color: var(--fg); }

/* Auth page */
.auth-body { background: var(--bg-soft); min-height: 100vh; }
.auth-main {
  display: flex; align-items: center; justify-content: center;
  padding: 60px 24px;
}
.auth-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  width: 100%; max-width: 420px;
  box-shadow: 0 4px 24px rgba(20, 24, 31, 0.04);
}
.auth-card h1 { font-size: 1.5rem; margin-bottom: 8px; }
.auth-card form { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
.auth-card label { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; font-weight: 500; }
.auth-card input {
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit; font-size: 1rem;
  background: var(--bg); color: var(--fg);
}
.auth-card input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(52, 87, 213, 0.15);
}
.auth-note { margin-top: 24px; text-align: center; }

.auth-actions {
  display: flex; gap: 10px; margin-top: 20px;
}

.form-error {
  background: #fdecea; color: var(--danger);
  border: 1px solid #f5b5af;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .nav { padding: 14px 18px; }
  .nav-links { gap: 12px; }
  .nav-links a:not(.btn) { display: none; }
  .hero { padding: 60px 20px 40px; }
  .features, .cta, .footer { padding-left: 20px; padding-right: 20px; }
}