/* Base styles */
:root {
    --primary-color: #0071e3;
    --secondary-color: #1d1d1f;
    --background-color: #f5f5f7;
    --card-background: #ffffff;
    --text-color: #1d1d1f;
    --border-color: #d2d2d7;
    --success-color: #4cd964;
    --warning-color: #ff9500;
    --error-color: #ff3b30;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    text-decoration: underline;
}

/* Header styles */
header {
    background-color: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.site-title-link {
    color: white;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.site-title-link:hover {
    opacity: 0.9;
    text-decoration: none;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* About section styles */
.about-section {
    background-color: var(--card-background);
    border-bottom: 1px solid var(--border-color);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 10px;
}

.about-header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem 0;
}

.about-header h2 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--secondary-color);
}

.about-toggle-arrow {
    font-size: 1.2rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
    margin-right: 0.5rem;
}

.about-toggle-arrow.collapsed {
    transform: rotate(-90deg);
}

.about-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0;
}

.about-content.expanded {
    max-height: 500px;
    padding: 1rem 0;
}

.about-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* Navigation and filters */
nav {
    background-color: white;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background-color: rgba(0, 113, 227, 0.1);
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.search input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.9rem;
    width: 200px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    font-size: 0.95rem;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--primary-color);
    text-decoration: none;
}

/* Main content and device grid */
main {
    padding: 2rem 0;
}

.filter-device-gap {
    height: 1.5rem;
}

.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.device-card {
    background-color: var(--card-background);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.device-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.device-name {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.device-name a.device-link {
    color: var(--text-color);
    transition: color 0.2s ease;
}

.device-name a.device-link:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.device-card {
    cursor: pointer;
}

.device-manufacturer {
    color: #666;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.device-issues {
    margin-bottom: 1.5rem;
}

.device-issues h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--error-color);
}

.device-alternative {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.device-alternative h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--success-color);
}

.device-date {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: #666;
    text-align: right;
}

/* Hide devices that don't match the filter */
.device-card.hidden {
    display: none;
}

/* Device Detail Page */
.device-detail-container {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}

.device-detail-card {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 800px;
}

.device-detail-card .device-name {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.device-detail-card .device-manufacturer {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: #666;
}

.device-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.device-category {
    display: inline-block;
    padding: 0.3rem 1rem;
    background-color: rgba(0, 113, 227, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.device-issues-detail {
    margin-bottom: 2.5rem;
}

.device-issues-detail h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--error-color);
}

.device-issues-detail p {
    font-size: 1.1rem;
    line-height: 1.7;
}

.device-alternative-detail {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.device-alternative-detail h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--success-color);
}

.alternative-link {
    display: inline-block;
    font-size: 1.1rem;
    padding: 0.5rem 1.5rem;
    background-color: rgba(76, 217, 100, 0.1);
    color: var(--success-color);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.alternative-link:hover {
    background-color: rgba(76, 217, 100, 0.2);
    text-decoration: none;
}

/* 404 Error Page */
.error-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.error-container {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 3rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    max-width: 600px;
    margin: 0 auto;
}

.error-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--error-color);
}

.error-message {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.back-button {
    display: inline-block;
    margin-top: 2rem;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 30px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.back-button:hover {
    background-color: #005bbf;
    text-decoration: none;
}

/* Footer styles */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    margin-top: 2rem;
    text-align: center;
}

footer p {
    margin-bottom: 1rem;
}

footer a {
    color: #0071e3;
}

/* Responsive styles */
@media (max-width: 768px) {
    nav .container {
        flex-direction: column;
        align-items: stretch;
    }

    .filters {
        justify-content: center;
        margin-bottom: 1rem;
    }

    .search {
        width: 100%;
    }

    .search input {
        width: 100%;
    }

    .devices-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .device-detail-card {
        padding: 1.5rem;
    }

    .device-detail-card .device-name {
        font-size: 1.7rem;
    }

    .error-container {
        padding: 2rem;
    }

    .error-title {
        font-size: 2rem;
    }

    .error-message {
        font-size: 1rem;
    }
}