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

body {
    font-family: "Segoe UI", Arial, sans-serif;
    color: #1a1a2e;
    background: #f7f7fb;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.logo span {
    color: #ff6b6b;
}

.nav-links a,
.nav-links .welcome {
    color: #fff;
    margin-left: 1.5rem;
    text-decoration: none;
    font-size: 0.95rem;
}

.btn-outline {
    border: 1px solid #fff;
    padding: 0.4rem 1rem;
    border-radius: 6px;
}

.hero {
    background: linear-gradient(135deg, #1a1a2e, #4834d4);
    color: #fff;
    padding-bottom: 4rem;
}

.hero-content {
    text-align: center;
    padding: 3rem 1rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.3rem;
    margin-top: 0.5rem;
}

.dates {
    margin-top: 0.5rem;
    opacity: 0.85;
}

.btn-primary {
    display: inline-block;
    margin-top: 1.5rem;
    background: #ff6b6b;
    color: #fff;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

section {
    max-width: 900px;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

section h2 {
    margin-bottom: 1rem;
    border-left: 4px solid #4834d4;
    padding-left: 0.75rem;
}

.card-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card-list li {
    background: #fff;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.card-list em {
    color: #4834d4;
    font-style: normal;
    font-size: 0.85rem;
}

.api-info code {
    background: #1a1a2e;
    color: #fff;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

footer {
    text-align: center;
    padding: 2rem;
    color: #888;
}

.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1a1a2e, #4834d4);
}

.login-box {
    background: #fff;
    padding: 2.5rem;
    border-radius: 10px;
    width: 320px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.login-box .logo {
    color: #1a1a2e;
    font-size: 1.4rem;
}

.login-box h2 {
    margin: 1.5rem 0 1rem;
}

.login-box form {
    display: flex;
    flex-direction: column;
    text-align: left;
    gap: 0.3rem;
}

.login-box input {
    padding: 0.6rem;
    margin-bottom: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 6px;
}

.login-box .btn-primary {
    width: 100%;
    margin-top: 0.5rem;
}

.login-box .hint {
    margin-top: 1.2rem;
    font-size: 0.8rem;
    color: #888;
}

.error {
    color: #e63946;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}