/* ───── Date Difference — Restyled Results ───── */
.diff-preset-bar { display:flex; flex-wrap:wrap; gap:6px; margin-bottom:0.75rem; }
.diff-preset { padding:6px 14px; font-size:0.78rem; font-weight:600; border-radius:100px; border:2px solid var(--border); background:var(--bg); color:var(--text-secondary); cursor:pointer; transition:all 0.15s; white-space:nowrap; font-family:var(--font); }
.diff-preset:hover { border-color:var(--accent); color:var(--accent); background:var(--accent-light); }

/* ===== Top Grid (Years, Months, Days) ===== */
.diff-top-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}
.diff-top-grid .result-item {
    text-align: center;
    padding: 1.25rem 0.75rem;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent-light), transparent 70%);
    border: 1px solid var(--border-glass);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16,1,0.3,1), box-shadow 0.3s;
}
.diff-top-grid .result-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255,107,74,0.15), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}
.diff-top-grid .result-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(255,107,74,0.15);
}
.diff-top-grid .result-item:hover::before { opacity: 1; }
.diff-top-grid .result-value {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent);
    position: relative;
    z-index: 1;
    letter-spacing: -0.03em;
    line-height: 1.1;
}
.diff-top-grid .result-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    position: relative;
    z-index: 1;
}

/* ===== Extra Grid ===== */
.diff-extra-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
    margin-bottom: 1rem;
}
.diff-extra-grid .result-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    background: var(--bg-glass);
    backdrop-filter: blur(8px);
    transition: all 0.25s cubic-bezier(0.16,1,0.3,1);
    position: relative;
    overflow: hidden;
    min-height: 56px;
}
.diff-extra-grid .result-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    border-radius: 0 2px 2px 0;
    opacity: 0.5;
    transition: opacity 0.3s, width 0.3s;
}
.diff-extra-grid .result-item:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(255,107,74,0.15);
    transform: translateX(3px);
}
.diff-extra-grid .result-item:hover::before {
    opacity: 1;
    width: 4px;
}
.diff-extra-grid .result-label {
    font-size: 0.78rem !important;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
    z-index: 1;
}
.diff-extra-grid .result-value {
    font-size: 1.05rem !important;
    font-weight: 700;
    color: var(--accent);
    margin-left: auto;
    text-align: right;
    white-space: nowrap;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}
.diff-extra-grid .result-item:nth-child(odd) .result-value { color: var(--accent); }
.diff-extra-grid .result-item:nth-child(even) .result-value { color: var(--accent-2); }

/* ===== Human Readable ===== */
.diff-human-read {
    padding: 1.25rem 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    backdrop-filter: blur(8px);
    transition: border-color 0.25s, box-shadow 0.25s;
}
.diff-human-read:hover {
    border-color: var(--accent);
    box-shadow: 0 4px 16px rgba(255,107,74,0.15);
}
.diff-human-read h4 {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-tertiary);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.diff-human-read p {
    font-size: 1.05rem;
    color: var(--text);
    font-weight: 600;
    line-height: 1.55;
}

.diff-section-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
}

.exclude-toggle { display:flex; align-items:center; gap:0.5rem; margin-top:0.5rem; }

@media (max-width: 768px) {
    .diff-top-grid { grid-template-columns: repeat(2, 1fr); }
    .diff-extra-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .diff-top-grid { grid-template-columns: repeat(2, 1fr); }
    .diff-extra-grid { grid-template-columns: 1fr; }
}