html,
body {
    min-height: 100%;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Inter, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

main {
    display: block;
}

input,
button {
    font: inherit;
}

button {
    cursor: pointer;
}

:root {
    --bg: #0f1115;
    --panel: #171a20;
    --text: #f7f7f5;
    --muted: #a5abb5;
    --accent: #f4b942;
    --border: #2a2f39;
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Inter, sans-serif;
    line-height: 1.6;
}

.container {
    width: min(1120px, 90%);
    margin: 0 auto;
}

.hero-content {
    max-width: 680px;
}

.navbar {
    padding: 32px 0;
}

.logo {
    color: white;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
}

.hero {
    padding: 160px 0 140px;
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .2em;
    font-size: .8rem;
    margin-bottom: 1rem;
}

h1 {
    font-family: Newsreader, serif;
    font-size: clamp(3rem, 7vw, 5rem);
    line-height: 1;
    margin-bottom: 1.5rem;
}

.subtitle {
    max-width: 36rem;
    color: var(--muted);
    font-size: 1.25rem;
    margin-bottom: 3rem;
}

.signup {
    display: flex;
    gap: 1rem;
}

.signup input {
    flex: 1;
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    font-size: 1rem;
}

.signup button {
    background: var(--accent);
    color: #111;
    border: none;
    border-radius: 12px;
    padding: 16px 24px;
    font-weight: 700;
    cursor: pointer;
    transition: transform .2s ease;
}

.signup button:hover {
    transform: translateY(-2px);
}

.features {
    border-top: 1px solid var(--border);
    padding: 80px 0;
}

.feature {
    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.feature:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.15);
    box-shadow: 0 20px 50px rgba(0,0,0,.25);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-grid h3 {
    margin-bottom: .75rem;
}

.feature-grid p {
    color: var(--muted);
}

@media (max-width: 768px) {
    .signup {
        flex-direction: column;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }
}
.feature {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 44px;
}

.feature h3 {
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.feature p {
    color: var(--muted);
    line-height: 1.8;
}

.hero-content {
    animation: fadeIn .6s ease;
}

@keyframes fadeIn {

    from {
        opacity:0;
        transform:translateY(16px);
    }

    to{
        opacity:1;
        transform:none;
    }

}
.button-primary {
    background: var(--accent);
    color: #111;
    border: none;
    border-radius: 12px;
    padding: 16px 28px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all .2s ease;
}

.button-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(244,185,66,.25);
}

.narrow{
    max-width:760px;
}

.panel{

    background:var(--panel);

    border:1px solid var(--border);

    border-radius:24px;

    padding:48px;

    margin:80px auto;

}

.panel .button-primary {
    width: 100%;
    margin-top: 12px;
}

.topics{

    display:flex;

    flex-wrap:wrap;

    gap:12px;

    margin:32px 0;

}

.topic{

    background:transparent;

    color:var(--text);

    border:1px solid var(--border);

    border-radius:999px;

    padding:12px 20px;

    cursor:pointer;

}

.topic:hover{

    border-color:var(--accent);

}
.topic.selected {
    background: var(--accent);
    color: #111;
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(244, 185, 66, 0.25);
}
.button-primary:disabled {
    opacity: .45;
    cursor: not-allowed;
}

.brief-preview {
    margin-top: 32px;
    text-align: left;
}

.brief-section {
    margin-bottom: 20px;
}

.brief-section-title {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .75rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.brief-article {
    padding: 14px 0;
    border-top: 1px solid var(--border);
}

.brief-article a {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
}

.brief-article a:hover {
    color: var(--accent);
}

.brief-article-why {
    color: var(--muted);
    font-size: .875rem;
    line-height: 1.5;
    margin-top: 6px;
}

.brief-article-source {
    color: var(--muted);
    font-size: .8rem;
    margin-top: 8px;
}

.brief-empty {
    color: var(--muted);
    font-size: .95rem;
}