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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #1a1a2e;
    background: #ffffff;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ── Hero ── */
.hero {
    background: #1a1a2e;
    color: #ffffff;
    text-align: center;
    padding: 5rem 1.5rem 4rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.25rem;
    color: #b0b0cc;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background: #6c63ff;
    color: #ffffff;
    padding: 0.85rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}

.cta-button:hover {
    background: #5a52d5;
}

/* ── Features ── */
.features {
    padding: 4rem 1.5rem;
    background: #f7f7fb;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: #ffffff;
    border-radius: 8px;
    padding: 1.75rem 1.5rem;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.95rem;
    color: #555;
}

/* ── Signup Section ── */
.signup {
    padding: 4rem 1.5rem;
    text-align: center;
}

.signup h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.signup-subtitle {
    color: #666;
    margin-bottom: 2rem;
}

.signup-form {
    max-width: 440px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.35rem;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 0.7rem 0.85rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #6c63ff;
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.field-error {
    display: block;
    color: #d32f2f;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.field-hint {
    display: block;
    color: #888;
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

.submit-button {
    width: 100%;
    margin-top: 0.5rem;
    font-size: 1.05rem;
    padding: 0.85rem;
}

.submit-button:disabled {
    background: #a0a0a0;
    cursor: not-allowed;
    opacity: 0.6;
}

/* ── Success ── */
.success-message {
    padding: 2rem 0;
}

.success-message h2 {
    color: #2e7d32;
    margin-bottom: 0.5rem;
}

.success-message p {
    color: #555;
    font-size: 1.1rem;
}

/* ── Footer ── */
.footer {
    text-align: center;
    padding: 2rem 1.5rem;
    color: #999;
    font-size: 0.85rem;
    border-top: 1px solid #eee;
}

/* ── Responsive ── */
@media (max-width: 600px) {
    .hero h1 { font-size: 1.75rem; }
    .tagline { font-size: 1rem; }
    .hero { padding: 3rem 1.5rem 2.5rem; }
    .features { padding: 2.5rem 1.5rem; }
    .signup { padding: 2.5rem 1.5rem; }
    .features-grid { grid-template-columns: 1fr; gap: 1.25rem; }
}