/* Yleiset tyylit */
:root {
    --primary-color: #333;
    --primary-hover: #444;
    --accent-color: #2196F3;
    --light-bg: #f5f5f5;
    --border-radius: 5px;
    --box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    background-color: #f0f2f5;
    color: #333;
}

/* Header ja navigaatio */
header {
    background-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links a, .nav-links span {
    color: white;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    text-decoration: none;
    font-size: 1.1rem;
}

.logo {
    color: white;
    font-size: 1.2rem;
    font-weight: 500;
}

/* Foorumin container ja layout */
.forum-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Kategoriat ja alakategoriat */
.categories-sidebar {
    width: 300px; /* Hieman leveämpi sivupalkki alakategorioille */
}

.category-list {
    display: flex;
    flex-direction: column;
}

.category-link, .subcategory-card {
    display: block;
    padding: 12px 15px;
    margin-bottom: 5px;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    background: white;
    box-shadow: var(--box-shadow);
}

/* Alakategorioiden tyylit */
.subcategory-grid {
    display: flex;
    flex-direction: column;
    margin-left: 20px; /* Sisennys */
    margin-bottom: 15px;
}

.subcategory-card {
    margin-top: 5px;
    background-color: #f8f9fa; /* Hieman vaaleampi tausta erottumisen vuoksi */
}

.subcategory-card h3 {
    font-size: 1rem; /* Hieman pienempi fontti kuin kategorioissa */
    margin: 0;
    color: var(--primary-color);
}

/* Piilotetaan main-content kun näytetään alakategoriat */
.main-content {
    display: none;
}

/* Kategoriat sivupalkki */
.categories-sidebar h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* Pääsisältöalue */
.main-content {
    width: 100%;
    min-width: 0; /* Estää sisällön ylivuotamisen */
}

/* Kategoriat ja alakategoriat */
.category-link, .subcategory-card {
    display: block;
    padding: 12px 15px;
    margin-bottom: 5px;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    background: white;
    box-shadow: var(--box-shadow);
}

.category-link:hover, .subcategory-card:hover {
    background-color: var(--light-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    color: var(--primary-color);
    text-decoration: none;
}

.category-link.active {
    background-color: var(--primary-color);
    color: white;
}

/* Aiheet */
.topics-list {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
}

.topic-item {
    padding: 15px 20px;
    border-bottom: 1px solid #eee;
    transition: background 0.2s ease;
}

.topic-item:hover {
    background-color: var(--light-bg);
}

.topic-title a {
    color: var(--primary-color);
    font-size: 1.1em;
    text-decoration: none;
    font-weight: 500;
}

.topic-title a:hover {
    color: var(--accent-color);
}

.topic-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 8px;
    color: #666;
    font-size: 0.9em;
}

/* Alakategorian otsikko */
.subcategory-header {
    background: white;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.subcategory-header h2 {
    margin: 0;
    color: var(--primary-color);
}

.new-topic-btn {
    background: var(--accent-color);
    color: white;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: all 0.2s ease;
}

.new-topic-btn:hover {
    background: #1976D2;
    transform: translateY(-2px);
}

/* Topic sivu */
.topic-content {
    max-width: 1000px;
    margin: 0 auto 20px auto;
    padding: 0 20px;
}

.topic-content h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Viestien tyylit */
.post {
    background: white;
    padding: 0;
    margin: 30px 0;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid #eee;
}

.post.original-post {
    background: white;
    border-left: 4px solid var(--accent-color);
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--light-bg);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    border-bottom: 1px solid #eee;
}

.post-meta .author {
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.post-meta .author::before {
    content: '👤';
}

.post-meta .date {
    color: #666;
    font-size: 0.9em;
}

.post-content {
    padding: 20px;
    line-height: 1.8;
    color: #444;
    background: white;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* Vastauslomake */
.reply-form {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 40px auto;
    max-width: 1000px;
}

.reply-form h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-bg);
}

.reply-form textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
    min-height: 150px;
    resize: vertical;
    transition: border-color 0.2s ease;
}

.reply-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.reply-form button {
    background: var(--accent-color);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 1rem;
    font-weight: 500;
}

.reply-form button:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Kirjautumiskehotus */
.login-prompt {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 40px auto;
    max-width: 1000px;
}

.login-prompt a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.login-prompt a:hover {
    text-decoration: underline;
}

/* Murupolku */
.breadcrumb {
    background: white;
    padding: 15px 20px;
    margin: 20px auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    max-width: 1000px;
    font-size: 0.9em;
}

.breadcrumb a {
    color: var(--accent-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.container {
    display: flex;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navigation {
    flex: 0 0 250px; /* Kiinteä leveys navigaatiolle */
}

.content {
    flex: 1; /* Vie lopun käytettävissä olevan tilan */
}