/* ============================================================================
   CALANDRIA RSS - FRONTEND TERMINAL THEME
   3-Column Layout: Categories | Articles | Reading Pane
   ============================================================================ */

:root {
    /* Reuse Admin Colors */
    --terminal-bg: #0a0a0a;
    --terminal-bg-light: #1a1a1a;
    --terminal-bg-lighter: #2a2a2a;
    --terminal-fg: #e0e0e0;
    --terminal-fg-dim: #888888;
    --terminal-accent: #ffffff;
    /* White for Frontend as requested */
    --terminal-accent-dim: #888888;
    --terminal-border: #333333;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;

    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

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

body {
    font-family: var(--font-mono);
    background-color: var(--terminal-bg);
    color: var(--terminal-fg);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--terminal-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--terminal-border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--terminal-accent-dim);
}

/* Layout */
.app-layout {
    display: grid;
    grid-template-columns: 250px 400px 1fr;
    height: 100vh;
    border-top: 2px solid var(--terminal-accent);
}

/* Common Column Styles */
.column {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--terminal-border);
    height: 100%;
    overflow: hidden;
}

.column-header {
    padding: var(--spacing-md);
    border-bottom: 1px dashed var(--terminal-border);
    color: var(--terminal-accent);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: var(--terminal-bg-light);
}

.column-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm) 0;
}

/* Column 1: Categories */
.category-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    color: var(--terminal-fg-dim);
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
}

.category-item:hover {
    color: var(--terminal-fg);
    background: var(--terminal-bg-lighter);
}

.category-item.active {
    color: var(--terminal-bg);
    background: var(--terminal-accent);
}

.category-count {
    font-size: 0.8em;
    opacity: 0.7;
}

/* Column 2: Article List */
.article-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--terminal-border);
    cursor: pointer;
    transition: background 0.2s;
}

.article-item:hover {
    background: var(--terminal-bg-light);
}

.article-item.active {
    border-left: 3px solid var(--terminal-accent);
    background: var(--terminal-bg-lighter);
}

.article-meta {
    font-size: 0.75rem;
    color: var(--terminal-fg-dim);
    margin-bottom: var(--spacing-xs);
    display: flex;
    justify-content: space-between;
}

.article-title {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--terminal-fg);
}

.article-source {
    color: var(--terminal-accent);
    font-size: 0.75rem;
}

/* Column 3: Preview */
.preview-container {
    padding: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.preview-header {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--terminal-border);
    padding-bottom: var(--spacing-md);
}

.preview-title {
    font-size: 1.5rem;
    color: var(--terminal-accent);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.preview-meta {
    color: var(--terminal-fg-dim);
    font-size: 0.9rem;
}

.preview-body {
    font-size: 1.1rem;
    color: var(--terminal-fg);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.preview-summary {
    font-size: 1rem;
    color: var(--terminal-fg-dim);
    font-style: italic;
    margin-bottom: var(--spacing-lg);
    border-left: 2px solid var(--terminal-border);
    padding-left: var(--spacing-md);
}

.preview-full-content {
    word-break: break-word;
}

.preview-full-content img {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--terminal-border);
    margin: var(--spacing-sm) 0;
}

.preview-actions {
    margin-top: var(--spacing-lg);
}

.btn-terminal {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--terminal-accent);
    color: var(--terminal-accent);
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.2s;
    background: transparent;
}

.btn-terminal:hover {
    background: var(--terminal-accent);
    color: var(--terminal-bg);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--terminal-fg-dim);
    font-style: italic;
    text-align: center;
    padding: var(--spacing-lg);
}

.loading {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--terminal-accent-dim);
    animation: blink 1s infinite;
}

@keyframes blink {
    50% {
        opacity: 0.5;
    }
}

.loading-mini {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--terminal-fg-dim);
    font-size: 0.8rem;
    font-style: italic;
    animation: blink 1.5s infinite;
}

/* Mobile */
@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .column-categories,
    .column-preview {
        display: none;
        /* Simplification for MVP */
    }

    .column-articles {
        border-right: none;
    }
}

/* Footer */
.column-footer {
    margin-top: auto;
    padding: var(--spacing-md);
    border-top: 1px solid var(--terminal-border);
    background: var(--terminal-bg-light);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    font-size: 0.75rem;
}

.footer-link {
    color: var(--terminal-fg-dim);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--terminal-accent);
}

.separator {
    color: var(--terminal-border);
}