/* ==========================================================================
   Date & Time Difference Calculator Styles
   Theme & Token Integrated (Light / Dark)
   ========================================================================== */

.dd-container {
    padding: var(--space-4) 0;
}

.dd-header-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-6);
}

.dd-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-fg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.dd-title i {
    color: var(--color-accent);
}

.dd-description {
    color: var(--color-fg-muted);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Card surfaces */
.dd-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
    margin-bottom: var(--space-5);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.dd-card:hover {
    border-color: var(--color-accent);
}

.dd-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border);
}

.dd-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-fg);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: 0;
}

/* Quick pills / presets */
.dd-quick-presets {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.dd-preset-btn {
    font-size: 0.8rem;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface-elevated);
    color: var(--color-fg);
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.dd-preset-btn:hover {
    background-color: var(--color-accent);
    color: var(--color-accent-fg);
    border-color: var(--color-accent);
}

/* Hero Summary Card */
.dd-summary-hero {
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-elevated) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-bottom: var(--space-5);
    position: relative;
    overflow: hidden;
}

.dd-summary-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--color-accent);
}

.dd-summary-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-fg-muted);
    margin-bottom: var(--space-1);
}

.dd-summary-text {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-fg);
    line-height: 1.4;
    word-break: break-word;
}

.dd-summary-meta {
    font-size: 0.85rem;
    color: var(--color-fg-muted);
    margin-top: var(--space-2);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

/* Calendar Breakdown Grid */
.dd-breakdown-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.dd-breakdown-card {
    background-color: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    text-align: center;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.dd-breakdown-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
}

.dd-breakdown-num {
    font-size: 1.6rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--color-accent);
    line-height: 1.1;
}

.dd-breakdown-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--color-fg-muted);
    margin-top: var(--space-1);
}

/* Total Units Grid */
.dd-units-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.dd-unit-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    position: relative;
}

.dd-unit-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.dd-unit-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-fg-muted);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.dd-unit-value {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-fg);
    word-break: break-all;
}

.dd-unit-subtitle {
    font-size: 0.8rem;
    color: var(--color-fg-muted);
    margin-top: var(--space-1);
}

.dd-btn-copy-unit {
    background: transparent;
    border: none;
    color: var(--color-fg-muted);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.15s ease;
}

.dd-btn-copy-unit:hover {
    color: var(--color-accent);
    background-color: var(--color-surface-elevated);
}

/* Workday Analysis Progress */
.dd-workday-container {
    background-color: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
}

.dd-progress-bar-wrapper {
    height: 12px;
    border-radius: 6px;
    background-color: var(--color-border);
    overflow: hidden;
    display: flex;
    margin: var(--space-3) 0 var(--space-2) 0;
}

.dd-progress-segment-business {
    background-color: #22c55e;
    height: 100%;
    transition: width 0.3s ease;
}

.dd-progress-segment-weekend {
    background-color: #f59e0b;
    height: 100%;
    transition: width 0.3s ease;
}

.dd-workday-legend {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
    font-size: 0.85rem;
}

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

.dd-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.dd-legend-dot-business {
    background-color: #22c55e;
}

.dd-legend-dot-weekend {
    background-color: #f59e0b;
}

/* Swap dates button */
.dd-btn-swap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    color: var(--color-fg);
    cursor: pointer;
    transition: all 0.2s ease;
}

.dd-btn-swap:hover {
    background-color: var(--color-accent);
    color: var(--color-accent-fg);
    border-color: var(--color-accent);
    transform: rotate(180deg);
}

/* Option switches container */
.dd-options-box {
    background-color: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
}

.dd-option-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) 0;
}

.dd-option-row:not(:last-child) {
    border-bottom: 1px solid var(--color-border);
}

@media (max-width: 768px) {
    .dd-summary-text {
        font-size: 1.15rem;
    }
    .dd-breakdown-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .dd-units-grid {
        grid-template-columns: 1fr;
    }
}