/* EmacsNews - Modern Academic Style */

:root {
    --color-bg: #f5f7fa;
    --color-text: #2d3748;
    --color-text-muted: #718096;
    --color-link: #5b21b6;
    --color-link-hover: #4c1d95;
    --color-border: #e2e8f0;
    --color-header-bg: #3730a3;
    --color-header-text: #fff;
    --color-accent: #6366f1;
    --color-accent-light: #eef2ff;
    --color-accent-border: #a5b4fc;
    --color-tag-bg: #fef3c7;
    --color-tag-text: #92400e;
    --color-card-bg: #ffffff;
    --color-shadow: rgba(0, 0, 0, 0.08);
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --max-width: 920px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px var(--color-shadow);
    --shadow-md: 0 4px 6px var(--color-shadow), 0 1px 3px var(--color-shadow);
    --shadow-lg: 0 10px 15px var(--color-shadow), 0 4px 6px var(--color-shadow);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

/* Base */
html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--color-header-bg) 0%, #4f46e5 100%);
    color: var(--color-header-text);
    padding: 2.5rem 0;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cpath d='M20 20.5V18H0v-2h20v-2H0v-2h20v-2H0V8h20V6H0V4h20V2H0V0h22v20.5h-2V20H0v-2h20v2.5zM0 20h2v2H0v-2zm4 0h2v2H4v-2zm4 0h2v2H8v-2zm4 0h2v2h-2v-2zm4 0h2v2h-2v-2zm4 0h2v2h-2v-2z' fill='%23ffffff' fill-opacity='0.05'/%3E%3C/svg%3E");
    pointer-events: none;
}

header .container {
    position: relative;
    z-index: 1;
}

header h1 {
    margin: 0;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

header .tagline {
    margin: 0.5rem 0 0 0;
    font-size: 1.05rem;
    opacity: 0.9;
    font-weight: 400;
}

/* Main Content */
main {
    padding-bottom: 3rem;
}

/* About Section */
.about {
    background-color: var(--color-accent-light);
    border: none;
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.about p {
    margin: 0;
    color: var(--color-text);
    font-size: 0.95rem;
}

/* Filters */
.filters {
    margin-bottom: 2rem;
    padding: 1.25rem 1.5rem;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.filters label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    margin-right: 0.5rem;
}

.filters select {
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-card-bg);
    min-width: 180px;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.filters select:hover {
    border-color: var(--color-accent);
}

.filters select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
    outline: none;
}

/* Articles Section */
.articles h2 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    color: var(--color-text);
}

.articles .meta {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0 0 1.5rem 0;
}

/* Article List */
.article-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.article-item {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent-border);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.article-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--color-accent);
}

.article-item article {
    padding: 1.25rem 1.5rem;
}

.article-item h3 {
    margin: 0 0 0.625rem 0;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.45;
}

.article-item h3 a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.article-item h3 a:hover {
    color: var(--color-link-hover);
}

/* Article Meta */
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    align-items: center;
}

.article-meta .source {
    font-weight: 600;
    color: var(--color-text);
    background-color: var(--color-bg);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
}

.article-meta .date {
    color: var(--color-text-muted);
}

.article-meta .date::before {
    content: "|";
    margin-right: 0.75rem;
    color: var(--color-border);
}

.article-meta .keywords {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.keyword-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

/* No Articles */
.no-articles {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-muted);
    background-color: var(--color-card-bg);
    border-radius: var(--radius-md);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding: 1.25rem;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.pagination-btn {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-link);
    background-color: var(--color-card-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
    transform: translateY(-1px);
}

.pagination-btn:active:not(:disabled) {
    transform: translateY(0);
}

.pagination-btn:disabled {
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.5;
}

.page-info {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    min-width: 100px;
    text-align: center;
}

/* Footer */
footer {
    background-color: var(--color-card-bg);
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
    margin-top: 2rem;
}

footer p {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-align: center;
}

footer .update-info {
    margin-top: 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    background-color: var(--color-bg);
    display: block;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

/* Responsive */
@media (max-width: 600px) {
    header {
        padding: 1.75rem 0;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .container {
        padding: 0 1rem;
    }

    .filters {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .filters select {
        width: 100%;
    }

    .article-item article {
        padding: 1rem;
    }

    .article-item:hover {
        transform: none;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .article-meta .date::before {
        display: none;
    }

    .pagination {
        flex-direction: column;
        gap: 0.75rem;
    }

    .pagination-btn {
        width: 100%;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        transform: none !important;
    }
}

/* Focus styles */
a:focus,
select:focus,
button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    header {
        background: none;
        color: #000;
        box-shadow: none;
    }

    .filters, .pagination {
        display: none;
    }

    .article-item {
        break-inside: avoid;
        border: none;
        border-bottom: 1px solid #ccc;
        box-shadow: none;
        border-left: none;
    }

    .gdpr-banner {
        display: none;
    }
}

/* Privacy link in footer */
.privacy-link {
    margin-top: 0.75rem;
}

.privacy-link a {
    color: var(--color-link);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.privacy-link a:hover {
    color: var(--color-link-hover);
}

/* For Sale Banner */
.for-sale-banner {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, #f0f7ff 100%);
    border: 1px solid var(--color-accent-border);
    border-radius: var(--radius-md);
}

.for-sale-banner p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text);
}

.for-sale-banner a {
    color: var(--color-link);
    font-weight: 600;
    text-decoration: none;
}

.for-sale-banner a:hover {
    color: var(--color-link-hover);
    text-decoration: underline;
}

/* GDPR Banner */
.gdpr-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--color-header-bg) 0%, #4f46e5 100%);
    color: var(--color-header-text);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
}

.gdpr-banner.visible {
    max-height: 200px;
    padding: 1.25rem 0;
}

.gdpr-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.gdpr-content p {
    margin: 0;
    flex: 1;
    min-width: 280px;
    font-size: 0.875rem;
    line-height: 1.6;
}

.gdpr-content button {
    background-color: #fff;
    color: var(--color-header-bg);
    border: none;
    padding: 0.625rem 1.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.gdpr-content button:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-1px);
}

.gdpr-content button:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

@media (max-width: 600px) {
    .gdpr-content {
        flex-direction: column;
        text-align: center;
    }

    .gdpr-content button {
        width: 100%;
    }
}

/* Privacy Policy Page */
.privacy-policy {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.privacy-policy h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
}

.privacy-policy .last-updated {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.privacy-policy section {
    margin-bottom: 2rem;
}

.privacy-policy section:last-child {
    margin-bottom: 0;
}

.privacy-policy h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0 0 0.75rem 0;
    color: var(--color-text);
}

.privacy-policy p {
    margin: 0 0 1rem 0;
    color: var(--color-text);
}

.privacy-policy ul {
    margin: 0 0 1rem 0;
    padding-left: 1.5rem;
}

.privacy-policy li {
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.privacy-policy a {
    color: var(--color-link);
    transition: color var(--transition-fast);
}

.privacy-policy a:hover {
    color: var(--color-link-hover);
}