/* ══════════════════════════════════════════════════════
   diff.css — Code Diff (DevFix)
   Escopado em .diff-page
   ══════════════════════════════════════════════════════ */

.diff-page {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    padding: 40px 20px 72px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    box-sizing: border-box;
}

/* ─── Hero ───────────────────────────────────────────── */
.diff-hero h1 {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -.5px;
    margin: 0 0 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

/* ─── Cards ──────────────────────────────────────────── */
.diff-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 28px 32px;
    box-shadow: var(--shadow-md);
    animation: diffFadeIn .4s ease both;
}

@keyframes diffFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Tabs ───────────────────────────────────────────── */
.diff-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}

.diff-tab {
    padding: 10px 20px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--dur) var(--ease);
    margin-bottom: -1px;
    display: flex;
    align-items: center;
    gap: 7px;
}

.diff-tab:hover { color: var(--text-secondary); }

.diff-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.diff-tab-content { display: none; }
.diff-tab-content.active { display: block; }

/* ─── Editores lado a lado ───────────────────────────── */
.diff-editors {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.diff-editor-wrap {}

.diff-editor-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.diff-editor-badge {
    padding: 2px 8px;
    border-radius: 99px;
    font-size: .65rem;
    font-weight: 700;
}

.diff-editor-badge.original {
    background: var(--error-soft);
    color: var(--error);
}

.diff-editor-badge.modified {
    background: var(--success-soft);
    color: var(--success);
}

.diff-textarea {
    width: 100%;
    min-height: 260px;
    padding: 14px;
    border-radius: var(--r-md);
    border: 1px solid var(--border);
    background: var(--bg-code);
    color: #e2e8f0;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    transition: border-color var(--dur) var(--ease);
    tab-size: 4;
}

.diff-textarea:focus { border-color: var(--accent); }
.diff-textarea::placeholder { color: #4a5568; }

/* ─── Upload mode ────────────────────────────────────── */
.diff-upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.diff-drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--r-md);
    padding: 36px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
    position: relative;
}

.diff-drop-zone:hover,
.diff-drop-zone.over {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.diff-drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.diff-drop-icon { color: var(--text-muted); margin-bottom: 10px; }
.diff-drop-text { font-weight: 600; color: var(--text-secondary); font-size: 0.9rem; }
.diff-drop-sub  { color: var(--text-muted); font-size: 0.78rem; margin-top: 4px; }
.diff-drop-loaded {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--success);
    margin-top: 8px;
    display: none;
}

/* ─── Botão comparar ─────────────────────────────────── */
.diff-compare-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.diff-btn-compare {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 32px;
    background: var(--accent);
    color: var(--text-on-accent);
    border: none;
    border-radius: var(--r-md);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.diff-btn-compare:hover { background: var(--accent-hover); transform: translateY(-1px); }
.diff-btn-compare:active { transform: scale(.97); }
.diff-btn-compare:disabled {
    background: var(--bg-hover);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

.diff-btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 11px 20px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--dur) var(--ease);
}

.diff-btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--accent-soft);
}

/* ─── Estatísticas ───────────────────────────────────── */
.diff-stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.diff-stat {
    text-align: center;
    padding: 16px 12px;
    background: var(--bg-raised);
    border-radius: var(--r-md);
    border: 1px solid var(--border-soft);
}

.diff-stat-val {
    font-size: 1.8rem;
    font-weight: 800;
    font-family: var(--font-mono);
    line-height: 1;
}

.diff-stat-val.added   { color: var(--success); }
.diff-stat-val.removed { color: var(--error); }
.diff-stat-val.neutral { color: var(--text-secondary); }
.diff-stat-val.total   { color: var(--accent); }
.diff-stat-val.pct     { color: var(--warning); }

.diff-stat-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ─── Análise de funções ─────────────────────────────── */
.diff-fn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 12px;
}

.diff-fn-group {}
.diff-fn-title {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.diff-fn-title.added   { color: var(--success); }
.diff-fn-title.removed { color: var(--error); }

.diff-fn-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.diff-fn-tag {
    padding: 4px 12px;
    border-radius: var(--r-sm);
    font-size: 0.78rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.diff-fn-tag.added   { background: var(--success-soft); color: var(--success); }
.diff-fn-tag.removed { background: var(--error-soft); color: var(--error); }

.diff-fn-warning {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    background: var(--warning-soft);
    border: 1px solid rgba(217, 119, 6, 0.2);
    border-radius: var(--r-md);
    font-size: 0.83rem;
    color: var(--text-secondary);
}

/* ─── Visualizador de diff ───────────────────────────── */
.diff-viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.diff-viewer-title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.diff-viewer-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.diff-viewer {
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    overflow: hidden;
    max-height: 500px;
    overflow-y: auto;
    background: var(--bg-code);
}

.diff-line {
    display: flex;
    align-items: stretch;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.6;
    border-left: 3px solid transparent;
}

.diff-line.added   { background: rgba(52, 211, 153, 0.08); border-left-color: var(--success); }
.diff-line.removed { background: rgba(248, 113, 113, 0.08); border-left-color: var(--error); }
.diff-line.unchanged { border-left-color: transparent; }
.diff-line.unchanged.hidden { display: none; }

.diff-line-num {
    width: 44px;
    flex-shrink: 0;
    text-align: right;
    padding: 2px 8px;
    color: #4a5568;
    border-right: 1px solid rgba(255,255,255,0.05);
    user-select: none;
    font-size: 0.72rem;
}

.diff-line-sign {
    width: 22px;
    flex-shrink: 0;
    text-align: center;
    padding: 2px 0;
    font-weight: 700;
}

.diff-line.added   .diff-line-sign { color: var(--success); }
.diff-line.removed .diff-line-sign { color: var(--error); }
.diff-line.unchanged .diff-line-sign { color: #4a5568; }

.diff-line-code {
    padding: 2px 12px;
    white-space: pre-wrap;
    word-break: break-all;
    flex: 1;
    color: #e2e8f0;
}

.diff-line.added   .diff-line-code { color: #a7f3d0; }
.diff-line.removed .diff-line-code { color: #fca5a5; }
.diff-line.unchanged .diff-line-code { color: #94a3b8; }

.diff-hunk-separator {
    padding: 4px 12px;
    background: var(--accent-soft);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    border-bottom: 1px solid rgba(168, 216, 200, 0.22);
}

/* ─── Legend ─────────────────────────────────────────── */
.diff-legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 12px;
}

.diff-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.diff-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

.diff-legend-dot.added   { background: var(--success); }
.diff-legend-dot.removed { background: var(--error); }
.diff-legend-dot.unchanged { background: var(--text-muted); }

/* ─── Responsivo ─────────────────────────────────────── */
@media (max-width: 760px) {
    .diff-page { padding: 24px 16px 48px; }
    .diff-card { padding: 20px 16px; }
    .diff-editors { grid-template-columns: 1fr; }
    .diff-upload-grid { grid-template-columns: 1fr; }
    .diff-stats-grid { grid-template-columns: repeat(3, 1fr); }
    .diff-fn-grid { grid-template-columns: 1fr; }
    .diff-compare-row { flex-direction: column; }
    .diff-btn-compare { width: 100%; justify-content: center; }
}

@media (max-width: 480px) {
    .diff-stats-grid { grid-template-columns: repeat(2, 1fr); }
}