* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #0f0f0f;
    color: #e5e7eb;
    min-height: 100vh;
}
a { color: #00d1ff; text-decoration: none; }
a:hover { text-decoration: underline; }

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid #222;
    background: #141414;
}
.logo { font-size: 22px; font-weight: 800; color: #fff; }
.logo span { color: #00d1ff; }
.nav { display: flex; gap: 16px; align-items: center; }
.nav a { color: #9ca3af; font-size: 14px; }
.nav a:hover { color: #fff; text-decoration: none; }

.container { max-width: 960px; margin: 0 auto; padding: 40px 20px; }

.hero {
    text-align: center;
    padding: 60px 20px 40px;
}
.hero h1 {
    font-size: 40px;
    margin-bottom: 12px;
    color: #fff;
}
.hero p {
    color: #9ca3af;
    font-size: 17px;
    margin-bottom: 28px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}
.btn {
    display: inline-block;
    padding: 12px 22px;
    border-radius: 10px;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary { background: #00d1ff; color: #000; }
.btn-primary:hover { background: #ааа; text-decoration: none; color: #000; }
.btn-secondary { background: #1f1f1f; color: #fff; border: 1px solid #333; }
.btn-secondary:hover { background: #2a2a2a; text-decoration: none; color: #fff; }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.card {
    background: #161616;
    border: 1px solid #262626;
    border-radius: 14px;
    padding: 28px;
    max-width: 420px;
    margin: 0 auto;
}
.card h2 { margin-bottom: 8px; color: #fff; }
.card .sub { color: #9ca3af; font-size: 14px; margin-bottom: 20px; }

label { display: block; font-size: 13px; color: #9ca3af; margin-bottom: 6px; }
input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid #333;
    background: #0f0f0f;
    color: #fff;
    font-size: 15px;
    margin-bottom: 14px;
}
input:focus { outline: none; border-color: #00d1ff; }
.btn-block { width: 100%; text-align: center; }

.error {
    background: #3f1a1a;
    color: #f87171;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 14px;
    font-size: 14px;
}
.success {
    background: #14321f;
    color: #4ade80;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 14px;
    font-size: 14px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 48px;
}
.feature {
    background: #161616;
    border: 1px solid #262626;
    border-radius: 12px;
    padding: 20px;
}
.feature h3 { color: #fff; margin-bottom: 8px; font-size: 16px; }
.feature p { color: #9ca3af; font-size: 14px; line-height: 1.45; }

.profile-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 20px;
}
@media (max-width: 700px) {
    .profile-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 30px; }
}
.stat {
    background: #161616;
    border: 1px solid #262626;
    border-radius: 12px;
    padding: 18px;
}
.stat .label { color: #9ca3af; font-size: 13px; }
.stat .value { font-size: 28px; font-weight: 700; color: #fff; margin-top: 6px; }

.footer {
    text-align: center;
    color: #6b7280;
    font-size: 13px;
    padding: 40px 20px;
}