/* ═══════════════════════════════════════════════════════════════════
   app.css — Component styles (references only var(--*) from theme.css)
   Mobile-first: base styles = mobile, @media = desktop enhancements
   ═══════════════════════════════════════════════════════════════════ */

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    letter-spacing: var(--tracking-wide);
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
}

/* === GRAIN TEXTURE === */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.025;
    pointer-events: none;
    z-index: var(--z-grain);
}

/* === LAYOUT === */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
}

/* === HEADER === */
.app-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.app-title {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-wider);
    color: var(--color-text);
    animation: fadeIn 0.7s ease;
}

.app-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    animation: fadeIn 0.7s ease 0.2s both;
}

/* === HEADER BAR (lang switcher + nav link) === */
.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-md);
    animation: fadeIn 0.7s ease 0.3s both;
}

.nav-link {
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    border: var(--border-width) solid var(--color-border);
    padding: var(--space-xs) var(--space-sm);
    transition: all var(--transition-fast) var(--transition-timing);
}

.nav-link:hover {
    color: var(--color-text);
    border-color: var(--color-text);
}

/* === LANGUAGE SWITCHER === */
.lang-switcher {
    display: flex;
    gap: var(--space-xs);
}

.lang-btn {
    background: none;
    border: var(--border-width) solid transparent;
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: all var(--transition-fast) var(--transition-timing);
}

.lang-btn:hover {
    color: var(--color-text);
}

.lang-btn.active {
    color: var(--color-text);
    border-bottom-color: var(--color-text);
}

/* === TABS === */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-lg);
    border: var(--border-width) solid var(--color-border);
    animation: fadeIn 0.7s ease 0.4s both;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    padding: var(--space-md);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: all var(--transition-fast) var(--transition-timing);
}

.tab-btn:first-child {
    border-right: var(--border-width) solid var(--color-border);
}

.tab-btn.active {
    background: var(--color-text);
    color: var(--color-bg);
}

.tab-btn:not(.active):hover {
    color: var(--color-text);
    background: var(--color-bg-surface);
}

/* === INPUT SECTION === */
.input-section {
    margin-bottom: var(--space-lg);
    animation: slideUp 0.6s ease 0.5s both;
}

.input-label {
    display: block;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.input-textarea {
    width: 100%;
    min-height: 160px;
    background: var(--color-bg-input);
    border: var(--border-width) solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    padding: var(--space-md);
    resize: vertical;
    transition: border-color var(--transition-fast) var(--transition-timing);
}

.input-textarea::placeholder {
    color: var(--color-text-muted);
}

.input-textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
}

.char-count {
    text-align: right;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.char-count.over-limit {
    color: var(--color-accent);
}

/* === TRANSLATE BUTTON === */
.btn-translate {
    width: 100%;
    background: var(--color-text);
    color: var(--color-bg);
    border: var(--border-width) solid var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-base);
    padding: var(--space-md) var(--space-lg);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    cursor: pointer;
    box-shadow: var(--shadow-brutal);
    transition: all var(--transition-fast) var(--transition-timing);
    animation: slideUp 0.6s ease 0.6s both;
}

.btn-translate:hover {
    background: var(--color-bg);
    color: var(--color-text);
    box-shadow: none;
    transform: translate(4px, 4px);
}

.btn-translate:active {
    transform: translate(4px, 4px);
    box-shadow: none;
}

.btn-translate:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-translate.loading {
    background: linear-gradient(
        90deg,
        var(--color-text) 0%,
        var(--color-text-secondary) 25%,
        var(--color-text) 50%,
        var(--color-text-secondary) 75%,
        var(--color-text) 100%
    );
    background-size: 200% 100%;
    animation: oceanWave 2s ease-in-out infinite;
    color: var(--color-bg);
}

/* === OUTPUT SECTION === */
.output-section {
    margin-top: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal) var(--transition-timing);
}

.output-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.output-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
}

.btn-copy {
    background: none;
    border: var(--border-width) solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: all var(--transition-fast) var(--transition-timing);
}

.btn-copy:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.btn-copy.copied {
    border-color: var(--color-success);
    color: var(--color-success);
}

.output-text {
    background: var(--color-bg-surface);
    border: var(--border-width) solid var(--color-border);
    padding: var(--space-lg);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.output-meta {
    text-align: right;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* === ERROR MESSAGE === */
.error-message {
    color: var(--color-accent);
    font-size: var(--text-sm);
    margin-top: var(--space-md);
    text-align: center;
}

/* === LOADING DOTS === */
.loading-dots {
    display: inline-flex;
    gap: var(--space-xs);
}

.loading-dots span {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--color-bg);
    animation: pulse 1.2s ease infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

/* === FOOTER === */
.app-footer {
    margin-top: var(--space-2xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
    animation: fadeIn 0.7s ease 0.8s both;
}

.app-footer p {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    letter-spacing: var(--tracking-wide);
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes oceanWave {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* === RESPONSIVE: DESKTOP === */
@media (min-width: 768px) {
    .container {
        padding: var(--space-2xl) var(--space-xl);
    }

    .input-textarea {
        min-height: 200px;
    }

    .tab-btn {
        font-size: var(--text-base);
    }
}

/* ═══════════════════════════════════════════════════════════════════
   FEED PAGE — Grid layout, viewport-fit, search, filters, modal
   ═══════════════════════════════════════════════════════════════════ */

/* === FEED PAGE LAYOUT (viewport-fit) === */
.feed-page {
    overflow: hidden;
}

.feed-container {
    display: flex;
    flex-direction: column;
    height: 100dvh;
    max-width: 960px;
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
}

.feed-container main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

/* === FEED HEADER === */
.feed-header {
    flex-shrink: 0;
}

.feed-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.feed-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    line-height: 1;
    letter-spacing: var(--tracking-wider);
    color: var(--color-text);
}

.feed-header-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* === FEED CONTROLS === */
.feed-controls {
    margin-bottom: var(--space-sm);
}

.search-bar {
    width: 100%;
    background: var(--color-bg-input);
    border: var(--border-width) solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-sm);
    transition: border-color var(--transition-fast) var(--transition-timing);
}

.search-bar::placeholder { color: var(--color-text-muted); }
.search-bar:focus { outline: none; border-color: var(--color-border-focus); }

.feed-filters {
    display: flex;
    gap: var(--space-sm);
}

/* === FILTER + SORT TABS (shared style) === */
.filter-tabs, .feed-sort {
    display: flex;
    border: var(--border-width) solid var(--color-border);
}

.filter-tabs { flex: 1; }
.feed-sort { flex-shrink: 0; }

.filter-btn, .sort-btn {
    flex: 1;
    background: transparent;
    border: none;
    border-right: var(--border-width) solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: all var(--transition-fast) var(--transition-timing);
    white-space: nowrap;
}

.filter-btn:last-child, .sort-btn:last-child { border-right: none; }

.filter-btn.active, .sort-btn.active {
    background: var(--color-text);
    color: var(--color-bg);
}

.filter-btn:not(.active):hover, .sort-btn:not(.active):hover {
    color: var(--color-text);
    background: var(--color-bg-surface);
}

/* === FEED GRID === */
.feed-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: min-content;
    align-content: start;
    gap: var(--space-sm);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
    padding-bottom: var(--space-xs);
}

/* === GRID CARD (compact) === */
.grid-card {
    border: var(--border-width) solid var(--color-border);
    padding: var(--space-sm);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    transition: border-color var(--transition-fast) var(--transition-timing);
    animation: fadeIn 0.3s ease both;
    overflow: hidden;
}

.grid-card:hover {
    border-color: var(--color-text);
}

.grid-card-mode {
    font-size: 0.6rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    margin-bottom: var(--space-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.grid-card-text {
    font-size: var(--text-sm);
    line-height: 1.4;
    color: var(--color-text);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-wrap: break-word;
}

.grid-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-xs);
    padding-top: var(--space-xs);
    border-top: 1px solid var(--color-border);
}

.grid-card-score {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 2px;
}

.grid-card-score .arrow-up { color: var(--color-success); }
.grid-card-score .arrow-down { color: var(--color-accent); }

.grid-card-time {
    font-size: 0.6rem;
    color: var(--color-text-muted);
}

/* === VOTE BUTTONS (used in detail modal) === */
.vote-group {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.vote-btn {
    background: none;
    border: var(--border-width) solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast) var(--transition-timing);
}

.vote-btn:hover { border-color: var(--color-text); color: var(--color-text); }
.vote-btn.active-up { border-color: var(--color-success); color: var(--color-success); }
.vote-btn.active-down { border-color: var(--color-accent); color: var(--color-accent); }

.vote-score {
    font-size: var(--text-sm);
    color: var(--color-text);
    min-width: 24px;
    text-align: center;
}

/* === PAGINATION === */
.pagination {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2px;
    padding: var(--space-sm) 0;
}

.page-btn {
    background: transparent;
    border: var(--border-width) solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast) var(--transition-timing);
}

.page-btn:hover { border-color: var(--color-text); color: var(--color-text); }
.page-btn.active { background: var(--color-text); color: var(--color-bg); }
.page-btn:disabled { opacity: 0.3; cursor: default; }
.page-ellipsis { color: var(--color-text-muted); font-size: var(--text-xs); padding: 0 var(--space-xs); }

/* === FEED CARD (used on detail page) === */
.feed-card {
    border: var(--border-width) solid var(--color-border);
    padding: var(--space-lg);
    animation: slideUp 0.4s ease both;
}

.feed-card-mode {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    margin-bottom: var(--space-sm);
}

.feed-card-input {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.feed-card-output {
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    white-space: pre-wrap;
    word-wrap: break-word;
    margin-bottom: var(--space-md);
}

.feed-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.feed-card-time {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.feed-card-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.header-nav-links {
    display: flex;
    gap: var(--space-sm);
}

/* === FEED LOADING / EMPTY === */
.feed-loading, .feed-empty {
    text-align: center;
    padding: var(--space-xl);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
}

/* === RESPONSIVE: FEED GRID === */
@media (max-width: 768px) {
    .feed-grid { grid-template-columns: repeat(2, 1fr); }
    .feed-container { padding: var(--space-xs) var(--space-sm); }
    .feed-header-top { flex-wrap: wrap; gap: var(--space-xs); }
    .feed-filters { flex-direction: column; gap: var(--space-xs); }
    .detail-content { padding: var(--space-lg); width: 95%; }
}

@media (max-width: 480px) {
    .feed-grid { grid-template-columns: 1fr; }
    .feed-title { font-size: var(--text-xl); }
}

/* === ADMIN PAGE === */
.admin-login-form {
    max-width: 320px;
    margin: var(--space-2xl) auto;
}

.admin-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: var(--space-md);
}

.admin-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    transition: opacity var(--transition-fast);
}

.admin-row-hidden {
    opacity: 0.4;
}

.admin-row-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1;
    min-width: 0;
}

.admin-row-id {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    flex-shrink: 0;
    min-width: 36px;
}

.admin-row-mode {
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.admin-row-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.admin-row-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.admin-row-score {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    min-width: 28px;
    text-align: right;
}

.admin-row-score.negative {
    color: var(--color-accent);
}

.admin-toggle-btn {
    background: transparent;
    border: var(--border-width) solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-xs);
    padding: var(--space-xs) var(--space-sm);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
    transition: all var(--transition-fast);
    min-width: 50px;
}

.admin-toggle-btn:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.admin-toggle-btn.is-hidden {
    border-color: var(--color-success);
    color: var(--color-success);
}

.admin-view-link {
    font-family: var(--font-body);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-decoration: none;
    letter-spacing: var(--tracking-wide);
    transition: color var(--transition-fast);
}

.admin-view-link:hover {
    color: var(--color-text);
}

@media (max-width: 600px) {
    .admin-row { flex-direction: column; align-items: flex-start; gap: var(--space-xs); }
    .admin-row-meta { align-self: flex-end; }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}