/* HackForge - web-003-wheres-my-page */
/* Dark theme knowledge base */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1a1a2e;
    color: #e0e0e0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    padding: 2rem 0;
    text-align: center;
    border-bottom: 3px solid #e94560;
}

.header-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header h1 {
    font-size: 2.2rem;
    color: #e94560;
    font-weight: 700;
    letter-spacing: 1px;
}

header .subtitle {
    color: #8a8a9e;
    font-size: 1rem;
    margin-top: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 3px;
}

nav {
    background-color: #16213e;
    border-bottom: 1px solid #2a2a4a;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    display: block;
    padding: 0.9rem 1.8rem;
    color: #b0b0c8;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s, background-color 0.2s;
    border-bottom: 2px solid transparent;
}

nav ul li a:hover {
    color: #e94560;
    background-color: rgba(233, 69, 96, 0.05);
}

nav ul li a.active {
    color: #e94560;
    border-bottom: 2px solid #e94560;
}

main {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

.content-box {
    background-color: #16213e;
    border: 1px solid #2a2a4a;
    border-radius: 8px;
    padding: 2rem;
}

.content-box h2 {
    color: #e94560;
    font-size: 1.6rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #2a2a4a;
}

.content-box h3 {
    color: #c0c0d8;
    font-size: 1.15rem;
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
}

.content-box p {
    margin-bottom: 0.8rem;
    color: #b0b0c8;
}

.content-box ul {
    margin: 0.5rem 0 1rem 1.5rem;
    color: #b0b0c8;
}

.content-box ul li {
    margin-bottom: 0.4rem;
}

.content-box a {
    color: #e94560;
    text-decoration: none;
}

.content-box a:hover {
    text-decoration: underline;
}

.error-message {
    text-align: center;
    padding: 2rem 1rem;
}

.error-message h2 {
    border-bottom: none;
    font-size: 1.8rem;
}

.error-message p {
    font-size: 1.05rem;
}

.error-message .hint {
    margin-top: 1.5rem;
    color: #6a6a7e;
    font-size: 0.9rem;
    font-style: italic;
}

footer {
    text-align: center;
    padding: 1.5rem 0;
    color: #5a5a6e;
    font-size: 0.85rem;
    border-top: 1px solid #2a2a4a;
    margin-top: auto;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.6rem;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    nav ul li a {
        padding: 0.7rem 1.2rem;
    }

    .content-box {
        padding: 1.2rem;
    }
}