/* DSL Core — Base Components.
 * No hardcoded colors, fonts, surfaces, or shadows.
 * All visual styling comes from tokens (which inherit from the theme)
 * or from structural values (layout, dimensions, cursor, etc.).
 */

/* ---- Typography helpers ---- */

.dslc-h1, .dslc-h2, .dslc-h3 {
    color: var(--dslc-text-primary);
    line-height: var(--dslc-lh-tight);
    margin: 0 0 var(--dslc-sp-3);
}
.dslc-h1 { font-size: var(--dslc-fs-h1); font-weight: var(--dslc-fw-display); }
.dslc-h2 { font-size: var(--dslc-fs-h2); font-weight: var(--dslc-fw-heading); }
.dslc-h3 { font-size: var(--dslc-fs-h3); font-weight: var(--dslc-fw-heading); }

.dslc-text-muted { color: var(--dslc-text-muted); }
.dslc-text-secondary { color: var(--dslc-text-secondary); }
.dslc-text-sm { font-size: var(--dslc-fs-sm); }
.dslc-text-xs { font-size: var(--dslc-fs-xs); }

/* ---- Card ---- */

.dslc-card {
    background: var(--dslc-bg-elevated);
    border: 1px solid var(--dslc-border);
    border-radius: var(--dslc-radius-card);
    box-shadow: var(--dslc-shadow-subtle);
    padding: var(--dslc-sp-6);
    color: var(--dslc-text-primary);
    line-height: var(--dslc-lh-body);
    transition: box-shadow var(--dslc-transition), transform var(--dslc-transition), border-color var(--dslc-transition);
}

.dslc-card > :first-child { margin-top: 0; }
.dslc-card > :last-child  { margin-bottom: 0; }

.dslc-card--hover:hover {
    box-shadow: var(--dslc-shadow-elevated);
    border-color: var(--dslc-border-strong);
}

.dslc-card--flush { padding: 0; overflow: hidden; }
.dslc-card--accent { border-left: 4px solid var(--dslc-orange); }

/* ---- Buttons ---- */

.dslc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--dslc-sp-2);
    padding: var(--dslc-sp-3) var(--dslc-sp-5);
    border-radius: var(--dslc-radius-control);
    border: 1px solid transparent;
    font-weight: var(--dslc-fw-heading);
    font-size: var(--dslc-fs-sm);
    line-height: 1;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition:
        background var(--dslc-transition-fast),
        border-color var(--dslc-transition-fast),
        color var(--dslc-transition-fast),
        box-shadow var(--dslc-transition-fast),
        transform var(--dslc-transition-fast);
    background: var(--dslc-orange);
    color: inherit;
}

.dslc-btn:hover { background: var(--dslc-orange-hover); color: inherit; }
.dslc-btn:active { background: var(--dslc-orange-active); }
.dslc-btn:focus-visible { outline: none; box-shadow: var(--dslc-shadow-focus); }

.dslc-btn:disabled,
.dslc-btn[aria-disabled="true"] {
    cursor: not-allowed;
    transform: none;
}

.dslc-btn--secondary {
    background: var(--dslc-bg-surface);
    border-color: var(--dslc-border-strong);
    color: var(--dslc-text-primary);
}
.dslc-btn--secondary:hover {
    background: var(--dslc-bg-surface-alt);
    border-color: var(--dslc-text-muted);
    color: var(--dslc-text-primary);
}

.dslc-btn--ghost {
    background: transparent;
    border-color: transparent;
    color: var(--dslc-text-secondary);
}
.dslc-btn--ghost:hover {
    background: var(--dslc-bg-surface-alt);
    color: var(--dslc-text-primary);
}

.dslc-btn--danger {
    background: transparent;
    border-color: transparent;
    color: var(--dslc-error);
}
.dslc-btn--danger:hover { background: var(--dslc-error-soft); color: var(--dslc-error); }

.dslc-btn--sm { padding: var(--dslc-sp-2) var(--dslc-sp-3); font-size: var(--dslc-fs-xs); }
.dslc-btn--lg { padding: var(--dslc-sp-4) var(--dslc-sp-6); font-size: var(--dslc-fs-body); }
.dslc-btn--block { display: flex; width: 100%; }

/* ---- Form controls ---- */

.dslc-input,
.dslc-select,
.dslc-textarea {
    display: block;
    width: 100%;
    padding: var(--dslc-sp-3) var(--dslc-sp-4);
    border-radius: var(--dslc-radius-control);
    border: 1px solid var(--dslc-border-strong);
    background: var(--dslc-bg-surface);
    color: var(--dslc-text-primary);
    font-size: var(--dslc-fs-sm);
    font-family: inherit;
    line-height: inherit;
    transition: border-color var(--dslc-transition-fast), box-shadow var(--dslc-transition-fast), background var(--dslc-transition-fast);
}

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

.dslc-input:hover,
.dslc-select:hover,
.dslc-textarea:hover { border-color: var(--dslc-text-muted); }

.dslc-input:focus,
.dslc-select:focus,
.dslc-textarea:focus {
    border-color: var(--dslc-border-focus);
    outline: none;
    box-shadow: var(--dslc-shadow-focus);
}

.dslc-input:disabled,
.dslc-select:disabled,
.dslc-textarea:disabled {
    background: var(--dslc-bg-surface-alt);
    color: var(--dslc-text-muted);
    cursor: not-allowed;
}

.dslc-input[aria-invalid="true"],
.dslc-select[aria-invalid="true"],
.dslc-textarea[aria-invalid="true"] {
    border-color: var(--dslc-error);
}

.dslc-textarea { resize: vertical; line-height: var(--dslc-lh-body); }

.dslc-field {
    display: flex;
    flex-direction: column;
    gap: var(--dslc-sp-2);
    margin-bottom: var(--dslc-sp-4);
}
.dslc-field > label,
.dslc-field .dslc-label {
    font-weight: var(--dslc-fw-medium);
    font-size: var(--dslc-fs-sm);
    color: var(--dslc-text-primary);
}
.dslc-field .dslc-help {
    font-size: var(--dslc-fs-xs);
    color: var(--dslc-text-muted);
}
.dslc-field .dslc-error {
    font-size: var(--dslc-fs-xs);
    color: var(--dslc-error);
}

.dslc-field-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--dslc-sp-4);
}

/* Checkbox/radio rows */
.dslc-check {
    display: inline-flex;
    align-items: center;
    gap: var(--dslc-sp-2);
    font-size: var(--dslc-fs-sm);
    color: var(--dslc-text-primary);
    cursor: pointer;
}
.dslc-check input[type="checkbox"],
.dslc-check input[type="radio"] {
    accent-color: var(--dslc-orange);
}

/* ---- Toggle switch ---- */

.dslc-toggle {
    appearance: none;
    -webkit-appearance: none;
    background: var(--dslc-border-strong);
    border-radius: var(--dslc-radius-pill);
    position: relative;
    cursor: pointer;
    transition: background var(--dslc-transition-fast);
    vertical-align: middle;
    flex-shrink: 0;
}
.dslc-toggle::after {
    content: '';
    position: absolute;
    background: currentColor;
    border-radius: 50%;
    transition: transform var(--dslc-transition-fast);
}
.dslc-toggle:checked { background: var(--dslc-orange); }
.dslc-toggle:focus-visible { box-shadow: var(--dslc-shadow-focus); outline: none; }
.dslc-toggle:disabled { cursor: not-allowed; }

/* ---- Alerts ---- */

.dslc-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--dslc-sp-3);
    padding: var(--dslc-sp-4) var(--dslc-sp-5);
    border-radius: var(--dslc-radius-card);
    border: 1px solid transparent;
    border-left-width: 4px;
    background: var(--dslc-info-soft);
    border-left-color: var(--dslc-info);
    color: var(--dslc-text-primary);
    font-size: var(--dslc-fs-sm);
    line-height: var(--dslc-lh-body);
    animation: dslc-fade-in var(--dslc-transition);
}

.dslc-alert--success { background: var(--dslc-success-soft); border-left-color: var(--dslc-success); }
.dslc-alert--warning { background: var(--dslc-warning-soft); border-left-color: var(--dslc-warning); }
.dslc-alert--error   { background: var(--dslc-error-soft);   border-left-color: var(--dslc-error); }
.dslc-alert--info    { background: var(--dslc-info-soft);    border-left-color: var(--dslc-info); }

.dslc-alert__body { flex: 1; min-width: 0; }
.dslc-alert__title {
    font-weight: var(--dslc-fw-heading);
    margin: 0 0 var(--dslc-sp-1);
    color: var(--dslc-text-primary);
    font-size: var(--dslc-fs-sm);
}
.dslc-alert__message { color: var(--dslc-text-secondary); }
.dslc-alert__message > :first-child { margin-top: 0; }
.dslc-alert__message > :last-child  { margin-bottom: 0; }

.dslc-alert__dismiss {
    background: transparent;
    border: none;
    color: var(--dslc-text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 0 var(--dslc-sp-1);
    border-radius: var(--dslc-radius-sm);
    transition: color var(--dslc-transition-fast), background var(--dslc-transition-fast);
}
.dslc-alert__dismiss:hover { color: var(--dslc-text-primary); background: var(--dslc-bg-surface-alt); }

/* ---- Progress ---- */

.dslc-progress {
    width: 100%;
    background: var(--dslc-bg-surface-alt);
    border-radius: var(--dslc-radius-pill);
    overflow: hidden;
}
.dslc-progress__bar {
    height: 100%;
    background: var(--dslc-orange);
    border-radius: var(--dslc-radius-pill);
    transition: width var(--dslc-transition-slow);
}
.dslc-progress__bar--success { background: var(--dslc-success); }
.dslc-progress__bar--info    { background: var(--dslc-info); }

/* ---- Badge / Pill ---- */

.dslc-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--dslc-sp-1);
    padding: var(--dslc-sp-1) var(--dslc-sp-3);
    border-radius: var(--dslc-radius-pill);
    background: var(--dslc-bg-surface-alt);
    color: var(--dslc-text-secondary);
    font-size: var(--dslc-fs-xs);
    font-weight: var(--dslc-fw-heading);
    text-transform: uppercase;
    white-space: nowrap;
}

.dslc-badge--brand   { background: var(--dslc-orange-soft);  color: var(--dslc-orange-hover); }
.dslc-badge--success { background: var(--dslc-success-soft); color: var(--dslc-success); }
.dslc-badge--warning { background: var(--dslc-warning-soft); color: var(--dslc-warning); }
.dslc-badge--error   { background: var(--dslc-error-soft);   color: var(--dslc-error); }
.dslc-badge--info    { background: var(--dslc-info-soft);    color: var(--dslc-info); }

.dslc-badge--dot::before {
    content: '';
    background: currentColor;
    display: inline-block;
    border-radius: 50%;
}

/* ---- Banner (full-width site notification) ---- */

.dslc-banner {
    position: fixed;
    left: 0;
    right: 0;
    padding: var(--dslc-sp-3) var(--dslc-sp-6);
    background: var(--dslc-bg-inverse);
    color: var(--dslc-text-inverse);
    font-size: var(--dslc-fs-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--dslc-sp-4);
    box-shadow: var(--dslc-shadow-elevated);
}

.dslc-banner--top    { top: 0;    animation: dslc-slide-down var(--dslc-transition-slow); }
.dslc-banner--bottom { bottom: 0; animation: dslc-slide-up   var(--dslc-transition-slow); }

.dslc-banner .dslc-alert__title { color: inherit; }
.dslc-banner .dslc-alert__message { color: inherit; }
.dslc-banner .dslc-alert__dismiss { color: inherit; }
.dslc-banner .dslc-alert__dismiss:hover { color: inherit; background: transparent; }
.dslc-banner .dslc-btn--secondary {
    background: transparent;
    border-color: currentColor;
    color: inherit;
}
.dslc-banner .dslc-btn--secondary:hover { background: transparent; }

/* ---- Spinner ---- */

.dslc-spinner {
    display: inline-block;
    border: 2px solid var(--dslc-border-strong);
    border-top-color: var(--dslc-orange);
    border-radius: 50%;
    animation: dslc-spin 0.8s linear infinite;
    vertical-align: middle;
}

/* ---- Links ---- */

.dslc-link { color: var(--dslc-text-link); text-decoration: none; }
.dslc-link:hover { text-decoration: underline; }

/* ---- Skeleton loaders ---- */

.dslc-skeleton {
    background: var(--dslc-bg-surface-alt);
    animation: dslc-skeleton-shimmer 1.4s ease infinite;
    border-radius: var(--dslc-radius-sm);
    display: block;
}
.dslc-skeleton--card  { border-radius: var(--dslc-radius-card); }
.dslc-skeleton--circle { border-radius: 50%; }

@keyframes dslc-skeleton-shimmer { 0% { opacity: 1; } 50% { opacity: 0.6; } 100% { opacity: 1; } }

/* ---- Stat — labeled numeric display ---- */
.dslc-stat {
    display: flex;
    flex-direction: column;
    gap: var(--dslc-sp-1);
}
.dslc-stat__label {
    font-size: var(--dslc-fs-xs);
    text-transform: uppercase;
    color: var(--dslc-text-muted);
    font-weight: var(--dslc-fw-heading);
}
.dslc-stat__value {
    font-size: var(--dslc-fs-display);
    font-weight: var(--dslc-fw-display);
    line-height: 1;
    color: var(--dslc-text-primary);
    font-feature-settings: var(--dslc-num-font-feature);
    display: inline-flex;
    align-items: baseline;
    gap: var(--dslc-sp-2);
}
.dslc-stat__value--lg { font-size: var(--dslc-fs-display); }
.dslc-stat__value--sm { font-size: var(--dslc-fs-h2); }

.dslc-stat__value--grade-a { color: var(--dslc-success); }
.dslc-stat__value--grade-b { color: var(--dslc-success); }
.dslc-stat__value--grade-c { color: var(--dslc-warning); }
.dslc-stat__value--grade-d { color: var(--dslc-warning); }
.dslc-stat__value--grade-f { color: var(--dslc-error); }

.dslc-stat__delta {
    font-size: var(--dslc-fs-sm);
    font-weight: var(--dslc-fw-heading);
    font-feature-settings: var(--dslc-num-font-feature);
    color: var(--dslc-text-muted);
}
.dslc-stat__delta--up   { color: var(--dslc-success); }
.dslc-stat__delta--down { color: var(--dslc-error); }

.dslc-stat__meta {
    font-size: var(--dslc-fs-xs);
    color: var(--dslc-text-secondary);
    line-height: var(--dslc-lh-body);
}

/* ---- Selectable card ---- */
.dslc-card--selectable {
    cursor: pointer;
    position: relative;
    transition: border-color var(--dslc-transition-fast), background var(--dslc-transition-fast), box-shadow var(--dslc-transition-fast);
}
.dslc-card--selectable:hover {
    border-color: var(--dslc-border-strong);
}
.dslc-card--selectable input[type="radio"],
.dslc-card--selectable input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.dslc-card--selectable:has(input:checked),
.dslc-card--selected {
    border-color: var(--dslc-orange);
    background: var(--dslc-orange-soft);
    box-shadow: var(--dslc-ring);
}

/* ---- Step ---- */
.dslc-step {
    display: flex;
    flex-direction: column;
    gap: var(--dslc-sp-3);
    padding: var(--dslc-sp-5);
    background: var(--dslc-bg-surface);
    border: 1px solid var(--dslc-border);
    border-left: 4px solid var(--dslc-border-strong);
    border-radius: var(--dslc-radius-card);
    box-shadow: var(--dslc-shadow-subtle);
    transition: box-shadow var(--dslc-transition-fast), border-color var(--dslc-transition-fast);
}
.dslc-step:hover {
    box-shadow: var(--dslc-shadow-elevated);
}
.dslc-step--phone { border-left-color: var(--dslc-info); }
.dslc-step--email { border-left-color: var(--dslc-orange); }
.dslc-step--todo  { border-left-color: var(--dslc-text-muted); }
.dslc-step--done  { border-left-color: var(--dslc-success); }

.dslc-step__head {
    display: flex;
    align-items: center;
    gap: var(--dslc-sp-2);
    flex-wrap: wrap;
}
.dslc-step__kind {
    font-size: var(--dslc-fs-xs);
    font-weight: var(--dslc-fw-heading);
    text-transform: uppercase;
    color: var(--dslc-text-muted);
}
.dslc-step__subject {
    font-size: var(--dslc-fs-body);
    font-weight: var(--dslc-fw-heading);
    color: var(--dslc-text-primary);
    flex: 1 1 auto;
    min-width: 0;
}
.dslc-step__body {
    font-size: var(--dslc-fs-body);
    line-height: var(--dslc-lh-body);
    color: var(--dslc-text-primary);
    padding: var(--dslc-sp-4);
    background: var(--dslc-bg-surface-alt);
    border-radius: var(--dslc-radius-control);
    white-space: pre-line;
}
.dslc-step__note {
    font-size: var(--dslc-fs-sm);
    color: var(--dslc-text-secondary);
    background: var(--dslc-warning-soft);
    padding: var(--dslc-sp-2) var(--dslc-sp-4);
    border-radius: var(--dslc-radius-control);
}
.dslc-step__actions {
    display: flex;
    gap: var(--dslc-sp-2);
    flex-wrap: wrap;
}

/* ---- Day track ---- */
.dslc-day-track {
    display: flex;
    flex-direction: column;
    gap: var(--dslc-sp-6);
}
.dslc-day-track__row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--dslc-sp-4);
    align-items: start;
}
.dslc-day-track__marker {
    position: sticky;
    top: var(--dslc-sp-4);
    padding: var(--dslc-sp-3) var(--dslc-sp-4) var(--dslc-sp-3) 0;
    text-align: right;
    font-size: var(--dslc-fs-xs);
    font-weight: var(--dslc-fw-heading);
    text-transform: uppercase;
    color: var(--dslc-orange-hover);
    border-right: 2px solid var(--dslc-border);
}
.dslc-day-track__items {
    display: flex;
    flex-direction: column;
    gap: var(--dslc-sp-3);
    min-width: 0;
}
@media (max-width: 640px) {
    .dslc-day-track__row { grid-template-columns: 1fr; gap: var(--dslc-sp-2); }
    .dslc-day-track__marker {
        position: static;
        text-align: left;
        border-right: none;
        border-left: 3px solid var(--dslc-orange);
        padding: var(--dslc-sp-1) var(--dslc-sp-3);
    }
}

/* ---- Search pill ---- */
.dslc-search-pill {
    display: flex;
    align-items: stretch;
    gap: var(--dslc-sp-3);
    padding: var(--dslc-sp-6) var(--dslc-sp-8);
    background: var(--dslc-bg-surface);
    border: 1px solid var(--dslc-border);
    border-radius: var(--dslc-radius-lg);
    box-shadow: var(--dslc-shadow-subtle);
    transition: box-shadow var(--dslc-transition);
}
.dslc-search-pill:focus-within { box-shadow: var(--dslc-shadow-elevated); }

.dslc-search-pill__input {
    flex: 1;
    padding: 0 var(--dslc-sp-8);
    background: var(--dslc-bg-surface);
    border: 1px solid var(--dslc-border-strong);
    border-radius: var(--dslc-radius-pill);
    font-size: var(--dslc-fs-lg);
    font-weight: var(--dslc-fw-heading);
    color: var(--dslc-text-primary);
    font-family: inherit;
    transition: border-color var(--dslc-transition-fast), box-shadow var(--dslc-transition-fast);
}
.dslc-search-pill__input::placeholder { font-weight: var(--dslc-fw-body); color: var(--dslc-text-muted); }
.dslc-search-pill__input:hover { border-color: var(--dslc-text-muted); }
.dslc-search-pill__input:focus {
    outline: none;
    border-color: var(--dslc-orange);
    box-shadow: var(--dslc-ring);
}

.dslc-search-pill__select {
    padding: 0 var(--dslc-sp-8) 0 var(--dslc-sp-5);
    background: var(--dslc-bg-surface);
    border: 1px solid var(--dslc-border-strong);
    border-radius: var(--dslc-radius-pill);
    font-size: var(--dslc-fs-body);
    font-weight: var(--dslc-fw-medium);
    color: var(--dslc-text-primary);
    font-family: inherit;
    cursor: pointer;
    transition: border-color var(--dslc-transition-fast), box-shadow var(--dslc-transition-fast);
}
.dslc-search-pill__select:hover { border-color: var(--dslc-text-muted); }
.dslc-search-pill__select:focus {
    outline: none;
    border-color: var(--dslc-orange);
    box-shadow: var(--dslc-ring);
}

.dslc-search-pill__submit {
    padding: 0 var(--dslc-sp-10);
    border-radius: var(--dslc-radius-pill);
    font-size: var(--dslc-fs-body);
    font-weight: var(--dslc-fw-heading);
}

@media (max-width: 640px) {
    .dslc-search-pill {
        flex-wrap: wrap;
        padding: var(--dslc-sp-5);
    }
    .dslc-search-pill__input { flex-basis: 100%; }
    .dslc-search-pill__select { flex: 1; }
}

/* ---- Icon ---- */
.dslc-icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.dslc-icon svg { width: 100%; height: 100%; display: block; }
.dslc-icon--lg { font-size: 1.5em; }
.dslc-icon--xl { font-size: 2.5em; }