/* General Theme & Variables */
:root {
    --bg-color: #f5f7fa;
    --text-color: #333;
    --card-bg: white;
    --header-bg: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    --header-text: white;
    --link-color: #6a11cb;
    --link-hover-color: #550eb9;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --label-color: #555;
    --gradient-1: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --button-bg: #28a745;
    --button-hover-bg: #218838;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --text-color: #e0e0e0;
        --card-bg: #1e1e1e;
        --header-bg: linear-gradient(135deg, #1e1e1e 0%, #2c2c2c 100%);
        --header-text: #f5f5f5;
        --link-color: #bb86fc;
        --link-hover-color: #9e66f1;
        --border-color: #444;
        --shadow-color: rgba(0, 0, 0, 0.5);
        --label-color: #bbb;
        --gradient-1: linear-gradient(135deg, #3c4a5e 0%, #1e2a3a 100%);
        --button-bg: #03dac6;
        --button-hover-bg: #018786;
    }
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--header-bg);
    color: var(--header-text);
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

/* --- Index Page Specific --- */
.description {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 25px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.search-box, .filter, .sort {
    flex: 1;
    min-width: 200px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: var(--label-color);
}

input, select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.stats {
    margin-bottom: 20px;
    font-size: 1.1rem;
    text-align: center;
    padding: 10px;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.project-card-wrapper {
    position: relative;
    min-height: 350px; 
}

.project-card {
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 3px 10px var(--shadow-color);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    z-index: 10;
    transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.project-card.is-expanded {
    z-index: 100;
    width: 140%;
    left: -20%;
    top: -15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.project-header {
    padding: 15px;
    background: var(--gradient-1);
    color: var(--header-text);
}

.project-title {
    font-size: 1.2rem;
    margin-bottom: 5px;
    font-weight: 600;
}

.project-id {
    font-size: 0.85rem;
    opacity: 0.9;
}

.project-details {
    padding: 20px;
}

.project-detail {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
}

.detail-label {
    font-weight: 600;
    min-width: 120px;
    color: var(--label-color);
}

.detail-value {
    flex: 1;
}

.project-description-content {
    padding: 0 20px;
    max-height: 0;
    overflow: auto;
    transition: max-height 0.35s ease-in-out, padding 0.35s ease-in-out;
}

.project-card.is-expanded .project-description-content {
    max-height: 500px;
    padding: 10px 20px 20px;
}

.project-links {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.project-link {
    flex: 1;
    display: block;
    text-align: center;
    padding: 12px;
    background: var(--link-color);
    color: white;
    text-decoration: none;
    font-weight: 600;
    border-radius: 6px;
    transition: background 0.3s ease;
}

.project-link:hover {
    background: var(--link-hover-color);
}

.empty {
    text-align: center;
    padding: 40px;
    font-size: 1.2rem;
    color: #777;
    grid-column: 1 / -1;
}

/* --- Details Page Specific --- */
.details-page .container {
    max-width: 900px;
    margin: 20px auto;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-color);
    overflow: hidden;
}

.details-page header {
    background: var(--header-bg);
    color: var(--header-text);
    padding: 30px;
    margin-bottom: 0;
}

.details-page h1 {
    margin: 0;
    font-size: 2.5rem;
}

.details-page .project-id {
    font-size: 1rem;
    opacity: 0.9;
    margin-top: 5px;
}

.details-page .content {
    padding: 30px;
}

.details-page .detail-item {
    margin-bottom: 20px;
}

.details-page .detail-label {
    font-weight: 700;
    color: var(--label-color);
    display: block;
    margin-bottom: 5px;
}

.details-page .detail-value {
    font-size: 1.1rem;
}

.details-page .description-content {
    border-top: 1px solid var(--border-color);
    margin-top: 25px;
    padding-top: 25px;
}

.details-page .no-data {
    text-align: center;
    padding: 50px;
    font-size: 1.2rem;
    color: #888;
}

.uni-link-btn {
    display: inline-block;
    background-color: var(--button-bg);
    color: white;
    padding: 12px 24px;
    margin-top: 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: background-color 0.3s ease;
}

.uni-link-btn:hover {
    background-color: var(--button-hover-bg);
}

/* Responsive Styles */
@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .controls {
        flex-direction: column;
    }
}