:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-alt: #162032;
    --accent: #38bdf8;
    --accent-soft: rgba(56, 189, 248, 0.12);
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #475569;
    --red: #f87171;
    --green: #4ade80;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg); color: var(--text);
    min-height: 100vh; line-height: 1.55;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ------- nav ------- */
.nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.25rem 2rem; max-width: 1100px; margin: 0 auto;
}
.brand {
    display: flex; align-items: center; gap: 0.6rem;
    font-weight: 700; font-size: 1.1rem; color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 1.5rem; align-items: center; font-size: 0.9rem; }
.nav-links a { color: var(--text-muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta {
    background: var(--accent); color: var(--bg) !important;
    border-radius: 8px; padding: 0.5rem 1rem; font-weight: 600;
}
.nav-cta:hover { opacity: 0.9; text-decoration: none; }

/* ------- hero ------- */
.hero {
    max-width: 880px; margin: 4rem auto 5rem; padding: 0 2rem;
    text-align: center;
}
.hero h1 {
    font-size: 2.6rem; line-height: 1.15; font-weight: 700;
    margin-bottom: 1.25rem; letter-spacing: -0.02em;
}
.hero h1 span { color: var(--accent); }
.hero p {
    font-size: 1.1rem; color: var(--text-muted); max-width: 620px;
    margin: 0 auto 2rem;
}
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.btn {
    display: inline-block; padding: 0.7rem 1.4rem; border-radius: 8px;
    font-size: 0.95rem; font-weight: 600; cursor: pointer;
    font-family: inherit; border: none; text-decoration: none;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { opacity: 0.9; text-decoration: none; }
.btn-ghost {
    background: transparent; color: var(--text);
    border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); text-decoration: none; }

/* ------- example cards (planning-poker visual) ------- */
.poker-row {
    display: flex; gap: 0.75rem; justify-content: center; margin-top: 3rem;
    flex-wrap: wrap;
}
.poker-card {
    width: 64px; height: 92px; border-radius: 8px;
    background: var(--surface); border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; font-weight: 700; color: var(--text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.15s, border-color 0.15s;
}
.poker-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.poker-card.accent { background: var(--accent); color: var(--bg); border-color: var(--accent); }

/* ------- sections ------- */
section { padding: 4rem 2rem; }
.section-inner { max-width: 1000px; margin: 0 auto; }
.section-eyebrow {
    text-align: center; font-size: 0.75rem; font-weight: 700;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 0.75rem;
}
.section-title {
    text-align: center; font-size: 1.8rem; font-weight: 700;
    margin-bottom: 3rem;
}

.features {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}
.feature {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 1.5rem;
}
.feature-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 9px;
    background: var(--accent-soft); color: var(--accent);
    font-size: 1.1rem; margin-bottom: 0.85rem;
}
.feature h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.4rem; }
.feature p { font-size: 0.9rem; color: var(--text-muted); }

.steps {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}
.step { text-align: center; padding: 0 0.75rem; }
.step-num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--accent); color: var(--bg);
    font-weight: 700; font-size: 1.05rem; margin-bottom: 0.85rem;
}
.step h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.4rem; }
.step p { font-size: 0.9rem; color: var(--text-muted); }

/* ------- sign-in card ------- */
.signin-section { background: var(--surface-alt); }
.signin-box {
    max-width: 380px; margin: 0 auto;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 2rem;
}
.signin-box h2 { font-size: 1.2rem; margin-bottom: 0.4rem; text-align: center; }
.signin-box .sub {
    text-align: center; font-size: 0.85rem; color: var(--text-muted);
    margin-bottom: 1.5rem;
}
label { display: block; font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.3rem; text-transform: uppercase; letter-spacing: 0.05em; }
input[type="email"], input[type="password"] {
    width: 100%; background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
    padding: 0.6rem 0.75rem; font-size: 0.95rem; color: var(--text);
    outline: none; font-family: inherit; margin-bottom: 1rem;
}
input:focus { border-color: var(--accent); }
.signin-box button {
    width: 100%; background: var(--accent); color: var(--bg); border: none; border-radius: 8px;
    padding: 0.7rem; font-size: 0.95rem; font-weight: 600; cursor: pointer;
    font-family: inherit;
}
.signin-box button:hover { opacity: 0.9; }
.error {
    background: rgba(248, 113, 113, 0.12); border: 1px solid rgba(248, 113, 113, 0.4);
    color: var(--red); font-size: 0.85rem; text-align: center;
    padding: 0.5rem; border-radius: 6px; margin-bottom: 1rem;
}

/* ------- footer ------- */
footer {
    text-align: center; padding: 2rem; font-size: 0.8rem;
    color: var(--text-muted); border-top: 1px solid var(--border);
}
footer a { color: var(--text-muted); }

@media (max-width: 600px) {
    .hero h1 { font-size: 2rem; }
    .nav { padding: 1rem; }
    section { padding: 3rem 1rem; }
}