/* === БАЗОВЫЕ СТИЛИ === */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background: #f0f2f5;
    color: #333;
}

.container {
    max-width: 1050px;
    margin: auto;
    background: #fff;
    padding: 30px 40px;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

/* === ШАПКА === */
header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 2px solid #eee;
    padding-bottom: 20px;
}

header h1 {
    margin: 0;
}

header h1 a {
    text-decoration: none;
    color: #2c3e50;
    font-size: 1.8em;
}

header h1 a:hover {
    color: #3498db;
}

/* === FLASH-СООБЩЕНИЯ === */
.flash {
    padding: 14px 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    border-left: 5px solid #3498db;
    background: #e8f4f8;
    color: #2c3e50;
    font-size: 0.95em;
}

.flash.success {
    border-color: #27ae60;
    background: #eafaf1;
    color: #1e8449;
}

.flash.warning {
    border-color: #f39c12;
    background: #fef9e7;
    color: #7d6608;
}

.flash.danger {
    border-color: #e74c3c;
    background: #fdedec;
    color: #922b21;
}

.flash.info {
    border-color: #3498db;
    background: #ebf5fb;
    color: #1a5276;
}

/* === БЛОК ДЕЙСТВИЙ === */
.actions {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 30px;
    border: 1px solid #e9ecef;
}

.actions h3 {
    margin-top: 0;
    margin-bottom: 12px;
    color: #2c3e50;
    font-size: 1.1em;
}

.actions hr {
    border: none;
    border-top: 1px solid #dee2e6;
    margin: 25px 0;
}

/* === ФОРМЫ === */
textarea,
input[type="text"],
input[type="file"] {
    width: 100%;
    padding: 12px 14px;
    margin-bottom: 12px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    font-size: 0.95em;
    font-family: inherit;
    transition: border-color 0.2s;
}

textarea:focus,
input[type="text"]:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.search-form {
    display: flex;
    gap: 10px;
}

.search-form input[type="text"] {
    flex: 1;
    margin-bottom: 0;
}

/* === КНОПКИ === */
.btn {
    display: inline-block;
    padding: 10px 22px;
    background: #3498db;
    color: #fff;
    text-decoration: none;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.95em;
    font-family: inherit;
    transition: background 0.2s, transform 0.1s;
}

.btn:hover {
    background: #2980b9;
}

.btn:active {
    transform: scale(0.98);
}

.btn-danger {
    background: #e74c3c;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: #95a5a6;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.85em;
}

/* === СТАТЬИ === */
.article-card {
    border-bottom: 1px solid #eee;
    padding: 20px 0;
}

.article-card:last-child {
    border-bottom: none;
}

.article-card h2 {
    margin: 0 0 8px 0;
    font-size: 1.25em;
}

.article-card h2 a {
    text-decoration: none;
    color: #2c3e50;
    transition: color 0.2s;
}

.article-card h2 a:hover {
    color: #3498db;
}

.meta {
    font-size: 0.88em;
    color: #7f8c8d;
    margin-bottom: 10px;
    line-height: 1.8;
}

.meta strong {
    color: #555;
}

.meta .badge {
    display: inline-block;
    background: #ecf0f1;
    color: #555;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
    margin-right: 4px;
}

.meta .badge.doi {
    background: #eaf2f8;
    color: #2471a3;
}

.preview-text {
    color: #555;
    font-size: 0.95em;
    margin: 8px 0;
}

.article-actions {
    margin-top: 10px;
}

/* === СТРАНИЦА СТАТЬИ === */
.article-full h1 {
    font-size: 1.6em;
    color: #2c3e50;
    margin-bottom: 10px;
}

.abstract-block {
    background: #f8f9fa;
    padding: 18px 22px;
    border-left: 4px solid #3498db;
    border-radius: 0 6px 6px 0;
    margin: 20px 0;
    font-size: 0.95em;
    line-height: 1.7;
}

.content-block {
    white-space: pre-wrap;
    background: #fff;
    padding: 25px;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    max-height: 700px;
    overflow-y: auto;
    font-size: 0.95em;
    line-height: 1.8;
}

/* === ПОИСК === */
.search-header {
    margin-bottom: 20px;
}

.search-header h2 {
    color: #2c3e50;
}

.search-header .count {
    color: #7f8c8d;
    font-weight: normal;
    font-size: 0.8em;
}

.rank-badge {
    display: inline-block;
    background: #27ae60;
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75em;
    margin-left: 8px;
    vertical-align: middle;
}

/* === ПУСТОЕ СОСТОЯНИЕ === */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #95a5a6;
}

.empty-state p {
    font-size: 1.1em;
}

/* === ФУТЕР === */
.back-link {
    margin-top: 25px;
    display: inline-block;
}

/* === АДАПТИВ === */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 20px 15px;
    }

    .search-form {
        flex-direction: column;
    }

    .search-form input[type="text"] {
        margin-bottom: 10px;
    }
}