@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:wght@400;600;700&display=swap');

:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --background-light: #f8fafc;
    --background-white: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 0;
    padding: 0;
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    margin: 20px auto;
    padding: 0;
    background: var(--background-white);
    box-shadow: var(--shadow-xl);
    border-radius: var(--border-radius);
    max-width: 1400px;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.header {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 50%, #4a5568 100%);
    color: white;
    padding: 24px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
    border-bottom: 3px solid #667eea;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    pointer-events: none;
}

.logo-title {
    display: flex;
    align-items: center;
    position: relative;
    z-index: 2;
}

.logo {
    height: 48px;
    margin-right: 16px;
    filter: brightness(0) invert(1);
    transition: var(--transition);
}

.logo:hover {
    transform: rotate(5deg) scale(1.05);
}

.header h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(45deg, #ffffff, #f093fb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.dark-mode-toggle {
    position: relative;
    z-index: 2;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 32px;
    margin-right: 16px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    border-radius: 32px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.slider:before {
    position: absolute;
    content: "☀️";
    height: 24px;
    width: 24px;
    left: 2px;
    bottom: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: var(--transition);
    border-radius: 50%;
    background: linear-gradient(135deg, #ffd700, #ffa500);
    box-shadow: var(--shadow-sm);
}

input:checked + .slider {
    background: rgba(255, 255, 255, 0.3);
}

input:checked + .slider:before {
    transform: translateX(28px);
    content: "🌙";
    background: linear-gradient(135deg, #4a5568, #2d3748);
}

.actions {
    display: flex;
    gap: 16px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.actions h2 {
    font-size: 1.25rem;
    font-weight: 500;
    margin: 0;
    color: white;
}

.login-btn {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(10px);
}

.login-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.header form {
    position: relative;
    z-index: 2;
}

.header input[type="submit"], .header button {
    padding: 12px 24px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(10px);
}

.header input[type="submit"]:hover, .header button:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.options {
    padding: 32px;
    background: var(--background-light);
    border-bottom: 1px solid var(--border-color);
}

.filter-section {
    background: var(--background-white);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: flex-start;
    border: 1px solid var(--border-color);
}

.search-form {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 250px;
}

.sort-form {
    display: flex;
    align-items: center;
    gap: 12px;
}

.filter-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex: 1;
    min-width: 100%;
}

.filter-section input[type="text"] {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--background-white);
    min-width: 250px;
}

.filter-section input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.filter-section select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--background-white);
    color: var(--text-primary);
    transition: var(--transition);
    min-width: 180px;
}

.filter-section select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.filter-section button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
}

.filter-section button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.select-section {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.filter-group {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 200px;
}

/* Filter headers */
.filter-group h4 {
    margin: 0;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    background: var(--background-light);
    border-radius: 12px 12px 0 0;
    border: 1px solid var(--border-color);
    border-bottom: none;
}

.author-filter h4::before {
    content: '👤';
    font-size: 16px;
}

.tag-filter h4::before {
    content: '🏷️';
    font-size: 16px;
}

/* Custom Dropdown Styling */
.custom-dropdown {
    position: relative;
    width: 100%;
}

.dropdown-trigger {
    width: 100%;
    padding: 16px 20px;
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 0 0 12px 12px;
    border-top: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: var(--transition);
    min-height: 56px;
}

.dropdown-trigger:hover {
    border-color: var(--primary-color);
    background: var(--background-light);
}

.dropdown-trigger.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    border-radius: 0 0 0 0;
}

.dropdown-text {
    color: var(--text-secondary);
    flex: 1;
}

.dropdown-text.has-selections {
    color: var(--text-primary);
    font-weight: 500;
}

.dropdown-arrow {
    transition: var(--transition);
    color: var(--text-muted);
}

.dropdown-trigger.active .dropdown-arrow {
    transform: rotate(180deg);
    color: var(--primary-color);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background-white);
    border: 1px solid var(--primary-color);
    border-top: none;
    border-radius: 0 0 12px 12px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    max-height: 250px;
    overflow-y: auto;
    display: none;
}

.dropdown-menu.active {
    display: block;
}

.dropdown-option {
    padding: 12px 16px;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.dropdown-option:last-child {
    border-bottom: none;
}

.dropdown-option:hover {
    background: var(--background-light);
}

/* Multi-select dropdown styling (for tags) */
.custom-dropdown:not(.single-select) .dropdown-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--background-white);
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    position: relative;
    margin: 0;
    flex-shrink: 0;
}

.custom-dropdown:not(.single-select) .dropdown-checkbox:hover {
    border-color: #48bb78;
    box-shadow: 0 0 0 2px rgba(72, 187, 120, 0.2);
}

.custom-dropdown:not(.single-select) .dropdown-checkbox:checked {
    background: linear-gradient(135deg, #48bb78, #38a169);
    border-color: #48bb78;
    background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='green' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='m13.854 3.646-7.5 7.5a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6 10.293l7.146-7.147a.5.5 0 0 1 .708.708z'/%3e%3c/svg%3e");
    background-size: 12px 12px;
    background-position: center;
    background-repeat: no-repeat;
}

/* Single-select dropdown styling (for authors) */
.single-select .dropdown-option {
    justify-content: flex-start;
    position: relative;
}

.single-select .dropdown-option.selected {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.single-select .dropdown-option.selected::after {
    content: '✓';
    position: absolute;
    right: 16px;
    font-size: 14px;
    font-weight: bold;
    color: white;
}

.single-select .dropdown-option:hover {
    background: var(--background-light);
}

.single-select .dropdown-option.selected:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

.dropdown-option label {
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.95rem;
    flex: 1;
    margin: 0;
    padding: 0;
    text-transform: none;
    letter-spacing: normal;
}

.dropdown-option:hover label {
    color: var(--primary-color);
}

.single-select .dropdown-option.selected label {
    color: white;
}

.single-select .dropdown-option.selected:hover label {
    color: white;
}

/* Selected items display */
.selected-items {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.selected-item {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 4px 8px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.selected-item .remove {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 12px;
    transition: var(--transition);
}

.selected-item .remove:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Hover effects for the filter groups */
.filter-group h4:hover {
    border-color: var(--primary-color);
}

.author-filter h4:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.tag-filter h4:hover {
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    color: white;
}

.filter-btn {
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 16px 32px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-sm);
    margin-top: 16px;
    align-self: flex-end;
}

.filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.posts {
    padding: 32px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 24px;
    background: var(--background-light);
}

.homePage {
    background: var(--background-white);
    padding: 24px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.homePage::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    transition: var(--transition);
}

.homePage:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.homePage:hover::before {
    width: 8px;
}

.homePage h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px 0;
    line-height: 1.3;
    transition: var(--transition);
}

.homePage h3:hover {
    color: var(--primary-color);
}

.homePage h4 {
    color: var(--text-muted);
    margin: 0 0 16px 0;
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.homePage p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0 0 16px 0;
}

.homePage span {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    display: block;
    margin-bottom: 16px;
}

.homePage a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.homePage a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* No posts message styling */
.no-posts-message {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    background: var(--background-white);
    border-radius: var(--border-radius);
    border: 2px dashed var(--border-color);
    margin: 20px 0;
}

.no-posts-content {
    text-align: center;
    padding: 40px;
    max-width: 500px;
}

.no-posts-icon {
    color: var(--text-muted);
    margin-bottom: 20px;
    opacity: 0.6;
}

.no-posts-message h3 {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 16px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.no-posts-message p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0 0 32px 0;
}

.reset-filters-btn {
    text-decoration: none;
}

.reset-filters-btn button {
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.reset-filters-btn button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 32px;
    background: var(--background-white);
    border-top: 1px solid var(--border-color);
}

.nav-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    background: var(--background-white);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
}

.navigation a .nav-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.navigation span .nav-btn {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Form styling improvements */
input[type="text"],
select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--background-white);
    color: var(--text-primary);
    transition: var(--transition);
}

input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input[type="submit"],
button {
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    font-size: 0.9rem;
}

input[type="submit"]:hover,
button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 8px;
    }

    .header {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
        text-align: center;
    }

    .header h1 {
        font-size: 2rem;
    }

    .actions {
        flex-wrap: wrap;
        justify-content: center;
    }

    .filter-section {
        flex-direction: column;
        gap: 20px;
    }

    .search-form {
        min-width: auto;
        flex-direction: column;
        align-items: stretch;
    }

    .search-form input {
        margin-bottom: 12px;
    }

    .sort-form {
        flex-direction: column;
        align-items: stretch;
    }

    .sort-form select {
        margin-bottom: 12px;
    }

    .select-section {
        flex-direction: column;
        gap: 20px;
    }

    .filter-group {
        min-width: auto;
    }

    .filter-btn {
        align-self: stretch;
        padding: 14px 24px;
        font-size: 0.95rem;
    }

    .dropdown-menu {
        max-height: 200px;
    }

    .posts {
        grid-template-columns: 1fr;
        padding: 16px;
        gap: 16px;
    }

    .navigation {
        flex-direction: column;
        gap: 12px;
    }

    .nav-btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .homePage {
        padding: 16px;
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .options {
        padding: 16px;
    }

    .filter-section {
        padding: 16px;
    }
}