727 lines
20 KiB
CSS
727 lines
20 KiB
CSS
/**
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* Peptide News Feed — Public Styles (Redesigned)
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*
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* Premium, Apple-inspired news feed with refined typography,
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* generous spacing, and smooth micro-interactions.
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*
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* Design by: Senior Design Director
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* Redesign Date: 2026-04-07
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* @since 2.2.0
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*/
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/* Import Inter font from Google Fonts */
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@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
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/* ══════════════════════════════════════════════════════════════════
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CSS CUSTOM PROPERTIES (Variables)
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══════════════════════════════════════════════════════════════════ */
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:root {
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/* Neutral Scale — Light Mode */
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--pn-bg-primary: #ffffff;
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--pn-bg-secondary: #f9fafb;
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--pn-border-light: #e5e7eb;
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--pn-border-subtle: #d1d5db;
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/* Text Colors */
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--pn-text-primary: #111827;
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--pn-text-secondary: #4b5563;
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--pn-text-tertiary: #9ca3af;
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--pn-text-muted: #d1d5db;
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/* Accent Colors */
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--pn-accent-primary: #2563eb;
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--pn-accent-hover: #1d4ed8;
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--pn-source-color: #1f2937;
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--pn-source-bg: #f3f4f6;
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/* Focus & System */
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--pn-focus-ring: #2563eb;
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--pn-error: #dc2626;
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--pn-error-bg: #fee2e2;
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--pn-success: #16a34a;
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--pn-loading: #6b7280;
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}
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/* ────────────────────────────────────────────────────────────────
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DARK MODE OVERRIDE
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────────────────────────────────────────────────────────────── */
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@media (prefers-color-scheme: dark) {
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:root {
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/* Neutral Scale — Dark Mode */
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--pn-bg-primary: #0f172a;
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--pn-bg-secondary: #1e293b;
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--pn-border-light: #334155;
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--pn-border-subtle: #475569;
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/* Text Colors */
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--pn-text-primary: #f1f5f9;
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--pn-text-secondary: #cbd5e1;
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--pn-text-tertiary: #94a3b8;
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--pn-text-muted: #64748b;
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/* Accent Colors */
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--pn-accent-primary: #60a5fa;
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--pn-accent-hover: #93c5fd;
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--pn-source-color: #e2e8f0;
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--pn-source-bg: #1e293b;
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/* Focus & System */
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--pn-focus-ring: #60a5fa;
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--pn-error: #f87171;
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--pn-error-bg: #7f1d1d;
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--pn-success: #86efac;
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--pn-loading: #64748b;
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}
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}
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/* ══════════════════════════════════════════════════════════════════
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BASE TYPOGRAPHY & LAYOUT
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══════════════════════════════════════════════════════════════════ */
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.pn-news-feed {
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max-width: 900px;
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margin: 0 auto;
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padding: 40px 20px;
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font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI',
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Roboto, 'Helvetica Neue', sans-serif;
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font-size: 16px;
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color: var(--pn-text-primary);
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line-height: 1.6;
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-webkit-font-smoothing: antialiased;
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-moz-osx-font-smoothing: grayscale;
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}
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/* ══════════════════════════════════════════════════════════════════
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ARTICLES LIST & CARD CONTAINER
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══════════════════════════════════════════════════════════════════ */
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.pn-articles-list {
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display: flex;
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flex-direction: column;
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gap: 0;
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list-style: none;
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padding: 0;
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margin: 0;
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}
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/* ────────────────────────────────────────────────────────────────
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ARTICLE CARD STRUCTURE
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────────────────────────────────────────────────────────────── */
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.pn-article {
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display: flex;
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flex-direction: column;
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padding: 24px;
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margin-bottom: 24px;
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gap: 12px;
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background: var(--pn-bg-primary);
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border: 1px solid var(--pn-border-light);
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border-radius: 8px;
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box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
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transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
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}
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.pn-article:hover {
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transform: translateY(-3px);
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box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
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border-color: var(--pn-border-subtle);
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}
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.pn-article:last-child {
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margin-bottom: 0;
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}
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/* ────────────────────────────────────────────────────────────────
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METADATA LINE (Source · Date)
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────────────────────────────────────────────────────────────── */
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.pn-article-meta {
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display: flex;
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align-items: center;
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flex-wrap: wrap;
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gap: 6px;
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margin-bottom: 12px;
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font-size: 13px;
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font-weight: 500;
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color: var(--pn-text-tertiary);
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line-height: 1.3;
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letter-spacing: 0.2px;
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}
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.pn-source {
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display: inline-block;
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padding: 4px 8px;
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background: var(--pn-source-bg);
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color: var(--pn-source-color);
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font-size: 13px;
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font-weight: 600;
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text-transform: uppercase;
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letter-spacing: 0.03em;
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border-radius: 4px;
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transition: all 0.15s ease;
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}
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.pn-source:hover {
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background: color-mix(in srgb, var(--pn-source-bg) 80%, var(--pn-source-color) 20%);
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cursor: pointer;
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}
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.pn-separator {
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display: inline-block;
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font-size: 11px;
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color: var(--pn-border-light);
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margin: 0 2px;
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}
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.pn-date {
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font-size: 13px;
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color: var(--pn-text-tertiary);
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}
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/* ────────────────────────────────────────────────────────────────
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ARTICLE TITLE
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────────────────────────────────────────────────────────────── */
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.pn-article-title {
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margin: 0 0 14px 0;
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font-size: 22px;
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font-weight: 700;
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line-height: 1.4;
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letter-spacing: -0.3px;
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color: var(--pn-text-primary);
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}
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.pn-article-title a {
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color: inherit;
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text-decoration: none;
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transition: color 0.2s ease, text-decoration 0.2s ease;
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}
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.pn-article-title a:hover {
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color: var(--pn-accent-primary);
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text-decoration: underline;
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text-decoration-thickness: 2px;
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text-underline-offset: 4px;
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}
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.pn-article-title a:focus-visible {
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outline: 2px solid var(--pn-focus-ring);
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outline-offset: 2px;
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}
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@media (prefers-color-scheme: dark) {
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.pn-article-title a:hover {
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color: var(--pn-accent-hover);
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}
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}
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/* ────────────────────────────────────────────────────────────────
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EXCERPT / SUMMARY
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────────────────────────────────────────────────────────────── */
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.pn-article-excerpt {
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margin: 0 0 14px 0;
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font-size: 15px;
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font-weight: 400;
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line-height: 1.7;
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color: var(--pn-text-secondary);
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display: -webkit-box;
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-webkit-box-orient: vertical;
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-webkit-line-clamp: 4;
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overflow: hidden;
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flex: 1;
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}
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/* ────────────────────────────────────────────────────────────────
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AUTHOR
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────────────────────────────────────────────────────────────── */
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.pn-author {
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margin: 0 0 10px 0;
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font-size: 13px;
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font-weight: 400;
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color: var(--pn-text-tertiary);
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line-height: 1.4;
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}
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.pn-author::before {
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content: '';
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}
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/* ══════════════════════════════════════════════════════════════════
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LOADING STATES & SKELETON
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══════════════════════════════════════════════════════════════════ */
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.pn-loading {
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display: flex;
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flex-direction: column;
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gap: 0;
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list-style: none;
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padding: 0;
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margin: 0;
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}
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.pn-skeleton-card {
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padding: 24px;
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margin-bottom: 24px;
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background: var(--pn-bg-primary);
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border: 1px solid var(--pn-border-light);
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border-radius: 8px;
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box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
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}
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.pn-skeleton-card:last-child {
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margin-bottom: 0;
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}
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.pn-skeleton-line {
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height: 12px;
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background: linear-gradient(
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90deg,
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var(--pn-loading) 0%,
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color-mix(in srgb, var(--pn-loading) 50%, transparent) 50%,
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var(--pn-loading) 100%
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);
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background-size: 200% 100%;
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border-radius: 4px;
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margin-bottom: 12px;
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animation: pn-shimmer 2s infinite;
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}
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/* Staggered animation delays for skeleton lines */
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.pn-skeleton-meta {
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width: 40%;
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height: 10px;
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animation: pn-shimmer 2s infinite 0s;
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}
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.pn-skeleton-title {
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width: 85%;
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height: 18px;
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margin-bottom: 14px;
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animation: pn-shimmer 2s infinite 0.1s;
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}
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.pn-skeleton-excerpt {
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width: 100%;
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height: 14px;
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animation: pn-shimmer 2s infinite 0.2s;
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}
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.pn-skeleton-excerpt-short {
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width: 70%;
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height: 14px;
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animation: pn-shimmer 2s infinite 0.3s;
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}
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.pn-skeleton-author {
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width: 30%;
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height: 10px;
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margin-top: 12px;
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animation: pn-shimmer 2s infinite 0.4s;
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}
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@keyframes pn-shimmer {
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0% { background-position: 200% 0; }
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100% { background-position: -200% 0; }
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}
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/* ══════════════════════════════════════════════════════════════════
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ERROR STATE
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══════════════════════════════════════════════════════════════════ */
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.pn-error {
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display: block;
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padding: 20px;
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text-align: center;
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background: color-mix(in srgb, var(--pn-error-bg) 50%, transparent);
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border: 1px solid var(--pn-border-light);
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border-radius: 8px;
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color: var(--pn-error);
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font-size: 15px;
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line-height: 1.6;
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}
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.pn-error p {
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margin: 0 0 16px 0;
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font-size: 15px;
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font-weight: 400;
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}
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.pn-error p:last-child {
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margin-bottom: 0;
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}
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.pn-retry-btn {
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display: inline-block;
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padding: 10px 20px;
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margin-top: 16px;
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font-size: 14px;
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font-weight: 600;
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line-height: 1.4;
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color: #ffffff;
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background: var(--pn-error);
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border: none;
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border-radius: 6px;
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cursor: pointer;
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transition: all 0.2s ease;
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}
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.pn-retry-btn:hover {
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opacity: 0.9;
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transform: scale(1.01);
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}
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.pn-retry-btn:active {
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transform: scale(0.99);
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}
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.pn-retry-btn:focus-visible {
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outline: 2px solid var(--pn-focus-ring);
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outline-offset: 2px;
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}
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/* ══════════════════════════════════════════════════════════════════
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EMPTY STATE
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══════════════════════════════════════════════════════════════════ */
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.pn-empty {
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display: block;
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padding: 60px 20px;
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text-align: center;
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color: var(--pn-text-tertiary);
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font-size: 16px;
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font-weight: 400;
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line-height: 1.6;
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}
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.pn-empty p {
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margin: 0;
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}
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/* ══════════════════════════════════════════════════════════════════
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PAGINATION
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══════════════════════════════════════════════════════════════════ */
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.pn-pagination {
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display: flex;
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align-items: center;
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justify-content: center;
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gap: 24px;
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margin-top: 40px;
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padding-top: 24px;
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border-top: 1px solid var(--pn-border-light);
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}
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.pn-page-btn {
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display: inline-flex;
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align-items: center;
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justify-content: center;
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padding: 10px 16px;
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font-size: 14px;
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font-weight: 600;
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line-height: 1.4;
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color: var(--pn-text-primary);
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background: var(--pn-bg-primary);
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border: 1px solid var(--pn-border-light);
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border-radius: 6px;
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cursor: pointer;
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transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
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}
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.pn-page-btn:hover:enabled {
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border-color: var(--pn-accent-primary);
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color: var(--pn-accent-primary);
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background: var(--pn-bg-secondary);
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transform: translateY(-2px);
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box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
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}
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.pn-page-btn:active:enabled {
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transform: translateY(0);
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box-shadow: 0 2px 4px rgba(37, 99, 235, 0.1);
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background: var(--pn-bg-secondary);
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}
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.pn-page-btn:disabled {
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opacity: 0.5;
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cursor: not-allowed;
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}
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.pn-page-btn:focus-visible {
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outline: 2px solid var(--pn-focus-ring);
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outline-offset: 2px;
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}
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.pn-page-info {
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font-size: 14px;
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font-weight: 500;
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line-height: 1.4;
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color: var(--pn-text-secondary);
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white-space: nowrap;
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}
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/* ══════════════════════════════════════════════════════════════════
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RESPONSIVE DESIGN — TABLET (768px - 1024px)
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══════════════════════════════════════════════════════════════════ */
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@media (min-width: 768px) and (max-width: 1023px) {
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.pn-news-feed {
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max-width: 100%;
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padding: 30px;
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}
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.pn-article {
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padding: 20px;
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gap: 12px;
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margin-bottom: 20px;
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}
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.pn-article-title {
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font-size: 20px;
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margin-bottom: 12px;
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}
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.pn-article-excerpt {
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margin-bottom: 12px;
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}
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.pn-skeleton-card {
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padding: 20px;
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margin-bottom: 20px;
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}
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}
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/* ══════════════════════════════════════════════════════════════════
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RESPONSIVE DESIGN — MOBILE (< 768px)
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══════════════════════════════════════════════════════════════════ */
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@media (max-width: 767px) {
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.pn-news-feed {
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max-width: 100%;
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padding: 20px 16px;
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}
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.pn-article {
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padding: 16px;
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gap: 10px;
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margin-bottom: 16px;
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}
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.pn-article-title {
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font-size: 18px;
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margin-bottom: 12px;
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line-height: 1.3;
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letter-spacing: -0.2px;
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}
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.pn-article-excerpt {
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font-size: 14px;
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line-height: 1.6;
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margin-bottom: 12px;
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-webkit-line-clamp: 3;
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}
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.pn-article-meta {
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gap: 6px;
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margin-bottom: 10px;
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font-size: 12px;
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}
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.pn-source {
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padding: 3px 6px;
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font-size: 12px;
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}
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.pn-author {
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margin-bottom: 8px;
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font-size: 12px;
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}
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.pn-skeleton-card {
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padding: 16px;
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margin-bottom: 16px;
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}
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.pn-pagination {
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flex-direction: column;
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gap: 12px;
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}
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.pn-page-btn {
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width: 100%;
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padding: 12px 16px;
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}
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.pn-page-info {
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width: 100%;
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}
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}
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/* ══════════════════════════════════════════════════════════════════
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SMALL MOBILE (< 480px)
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══════════════════════════════════════════════════════════════════ */
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@media (max-width: 479px) {
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.pn-news-feed {
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padding: 16px 12px;
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}
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.pn-article {
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padding: 12px;
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gap: 8px;
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margin-bottom: 12px;
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}
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.pn-article-title {
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font-size: 18px;
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margin-bottom: 10px;
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}
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.pn-article-excerpt {
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font-size: 14px;
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-webkit-line-clamp: 3;
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}
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.pn-article-meta {
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font-size: 12px;
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gap: 4px;
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margin-bottom: 8px;
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}
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.pn-skeleton-card {
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padding: 12px;
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margin-bottom: 12px;
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}
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}
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/* ══════════════════════════════════════════════════════════════════
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DARK MODE DARK MODE ENHANCEMENTS
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══════════════════════════════════════════════════════════════════ */
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@media (prefers-color-scheme: dark) {
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.pn-article {
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background: var(--pn-bg-primary);
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border-color: var(--pn-border-light);
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}
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.pn-article-title {
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color: var(--pn-text-primary);
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}
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.pn-article-excerpt {
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color: var(--pn-text-secondary);
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}
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.pn-article-meta {
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color: var(--pn-text-tertiary);
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}
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.pn-source {
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background: var(--pn-source-bg);
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color: var(--pn-source-color);
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}
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.pn-date {
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color: var(--pn-text-tertiary);
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}
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.pn-author {
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color: var(--pn-text-tertiary);
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}
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.pn-page-btn {
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background: transparent;
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border-color: var(--pn-border-light);
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color: var(--pn-text-primary);
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}
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.pn-page-btn:hover:enabled {
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border-color: var(--pn-accent-primary);
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color: var(--pn-accent-primary);
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background: transparent;
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}
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.pn-page-btn:disabled {
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color: var(--pn-text-muted);
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border-color: var(--pn-border-subtle);
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}
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.pn-page-info {
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color: var(--pn-text-secondary);
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}
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.pn-pagination {
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border-top-color: var(--pn-border-light);
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}
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.pn-error {
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background: color-mix(in srgb, var(--pn-error-bg) 40%, transparent);
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border-color: var(--pn-border-light);
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color: var(--pn-error);
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}
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.pn-retry-btn {
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background: var(--pn-error);
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color: #ffffff;
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}
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.pn-retry-btn:hover {
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opacity: 0.8;
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}
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.pn-empty {
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color: var(--pn-text-tertiary);
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}
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.pn-skeleton-line {
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background: linear-gradient(
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90deg,
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var(--pn-loading) 0%,
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color-mix(in srgb, var(--pn-loading) 50%, transparent) 50%,
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var(--pn-loading) 100%
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);
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background-size: 200% 100%;
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}
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.pn-skeleton-card {
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background: var(--pn-bg-primary);
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border-color: var(--pn-border-light);
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}
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}
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/* ══════════════════════════════════════════════════════════════════
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ACCESSIBILITY
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══════════════════════════════════════════════════════════════════ */
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/* High contrast mode support */
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@media (prefers-contrast: more) {
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.pn-article {
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border-width: 2px;
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}
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.pn-page-btn {
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border-width: 2px;
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}
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.pn-article-title a:focus-visible,
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.pn-page-btn:focus-visible,
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.pn-retry-btn:focus-visible {
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outline-width: 3px;
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}
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}
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/* Reduced motion support */
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@media (prefers-reduced-motion: reduce) {
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.pn-article,
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.pn-article-title a,
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.pn-page-btn,
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.pn-retry-btn,
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.pn-skeleton-line {
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animation: none !important;
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transition: none !important;
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}
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}
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