/* ==============================
   COMBINATION BUILDER
============================== */
.builder {
    padding: 40px 0 90px;
}

/* Current combination */
.current-combination {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
}

.combination-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
}

.combination-header > div {
    display: flex;
    align-items: center;
    gap: 12px;
}

.label {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.combination-count {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.text-button {
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.text-button:hover {
    color: var(--text-primary);
}

/* Combination list */
.combination-list {
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 30px;
    transition: background-color 0.2s ease;
}

.combination-list.is-drop-target {
    background: var(--surface-hover);
}

/* Empty combination */
.empty-combination {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.empty-combination span {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    border: 1px dashed var(--border-hover);
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 1.3rem;
}

.empty-combination p {
    max-width: 350px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Individual techniques */
.combination-technique {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    align-items: center;
    column-gap: 10px;
    row-gap: 0;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease;
    cursor: grab;
    user-select: none;
}

.combination-technique:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.combination-technique:active {
    cursor: grabbing;
}

.combination-technique.is-dragging,
.technique-button.is-dragging {
    opacity: 0.45;
}

.combination-technique.is-drag-over {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--surface-active);
    transform: translateY(-2px) scale(1.03);
}

.remove-technique-button {
    grid-column: -1;
    grid-row: 1;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
}

.remove-technique-button:hover,
.remove-technique-button:focus-visible {
    background: var(--surface-active);
    color: var(--accent);
}

.combination-number {
    grid-column: 1;
    grid-row: 1;
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
}

.combination-technique-name {
    grid-column: 2;
    grid-row: 1;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}

.combination-technique-options {
    display: block;
    margin-top: 2px;
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.combination-option-buttons button.is-selected,
.technique-option-buttons button.is-selected {
    border-color: var(--accent);
    background: var(--accent);
    color: white;
}

/* Combination actions */
.combination-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 18px 24px;
    border-top: 1px solid var(--border);
}

.combination-randomizer-actions,
.combination-utility-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.icon-button {
    width: 48px;
    height: 48px;
    display: inline-grid;
    place-items: center;
    flex: 0 0 48px;
    border: 1px solid var(--border-hover);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
}

.icon-button:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.icon-button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.icon-button svg {
    width: 19px;
    height: 19px;
}

.saved-combinations-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
}

.saved-combinations-heading h3 {
    font-size: 1.1rem;
}

.saved-combinations-heading .label {
    display: block;
}

.saved-combinations-list {
    display: grid;
    gap: 10px;
    padding: 16px 24px;
}

.saved-combinations-dialog {
    width: min(100% - 30px, 800px);
    max-height: min(80vh, 650px);
    margin: auto;
    padding: 0;
    overflow: hidden auto;
    border: 1px solid var(--border-hover);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text-primary);
}

.saved-combinations-dialog::backdrop {
    background: rgb(0 0 0 / 70%);
}

.empty-saved-combinations {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.saved-combination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
}

.saved-combination h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
}

.saved-combination p {
    margin-top: 3px;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.saved-combination-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

/* Save dialog */
.save-combination-dialog {
    width: min(100% - 30px, 440px);
    margin: auto;
    padding: 0;
    border: 1px solid var(--border-hover);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text-primary);
}

.save-combination-dialog::backdrop {
    background: rgb(0 0 0 / 70%);
}

.save-combination-dialog form {
    display: grid;
    gap: 12px;
    padding: 28px;
}

.save-combination-dialog h2 {
    font-size: 1.5rem;
}

.save-combination-dialog p,
.save-combination-dialog label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.save-combination-dialog label {
    margin-bottom: -6px;
    font-weight: 700;
}

.save-combination-dialog input {
    width: 100%;
    min-height: 46px;
    padding: 0 12px;
    border: 1px solid var(--border-hover);
    border-radius: 6px;
    background: var(--background);
    color: var(--text-primary);
    font: inherit;
}

.save-combination-dialog input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

/* Randomizer settings */
.randomizer-settings-dialog {
    width: min(100% - 30px, 440px);
    margin: auto;
    padding: 0;
    border: 1px solid var(--border-hover);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text-primary);
}

.randomizer-settings-dialog::backdrop {
    background: rgb(0 0 0 / 70%);
}

.randomizer-settings-dialog form {
    display: grid;
    gap: 16px;
    padding: 28px;
}

.randomizer-settings-dialog h2 {
    font-size: 1.5rem;
}

.randomizer-settings-dialog fieldset {
    display: grid;
    gap: 10px;
    border: 0;
}

.randomizer-settings-dialog legend {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 700;
}

.randomizer-length-inputs label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
}

.randomizer-category-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.randomizer-checkbox-option {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
}

.randomizer-checkbox-option input {
    position: absolute;
    opacity: 0;
}

.randomizer-checkbox-option span {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.randomizer-checkbox-option span::before {
    width: 16px;
    height: 16px;
    border: 1px solid var(--border-hover);
    border-radius: 4px;
    background: var(--background);
    content: "";
}

.randomizer-checkbox-option input:checked + span::before {
    border-color: var(--accent);
    background: var(--accent);
}

.randomizer-checkbox-option input:checked + span::after {
    position: absolute;
    top: 4px;
    left: 6px;
    width: 4px;
    height: 7px;
    border: solid var(--text-primary);
    border-width: 0 2px 2px 0;
    content: "";
    transform: rotate(45deg);
}

.randomizer-checkbox-option input:focus-visible + span::before {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

.randomizer-length-inputs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.randomizer-length-inputs label {
    display: grid;
    gap: 6px;
}

.randomizer-length-inputs input {
    width: 100%;
    min-height: 42px;
    padding: 8px 10px;
    border: 1px solid var(--border-hover);
    border-radius: 6px;
    background: var(--background);
    color: var(--text-primary);
    font: inherit;
}

.randomizer-length-inputs input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.randomizer-settings-error {
    min-height: 1.35em;
    color: var(--accent);
    font-size: 0.85rem;
}

.dialog-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    margin-top: 8px;
}

/* ==============================
   TECHNIQUE SELECTION
============================== */
.technique-selection {
    margin-top: 45px;
}

.technique-group {
    margin-bottom: 45px;
}

.technique-group:last-child {
    margin-bottom: 0;
}

.technique-group-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
}

.technique-group-heading h3 {
    font-size: 1.15rem;
}

.technique-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    align-items: start;
    gap: 10px;
}

.technique-picker-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    min-width: 0;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
}

.technique-button {
    width: 100%;
    min-height: 55px;
    padding: 12px;
    border: none;
    border-radius: 5px 0 0 5px;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 700;
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease;
    cursor: grab;
}

.technique-button:hover {
    background: var(--surface-hover);
}

.technique-button:active {
    background: var(--surface-active);
    cursor: grabbing;
}

.technique-picker-item:has(.technique-button:hover),
.technique-picker-item:has(.technique-options-preview:hover) {
    border-color: var(--border-hover);
}

.technique-options-preview {
    grid-column: 1 / -1;
    max-height: 0;
    overflow: hidden;
    display: grid;
    border-top: 1px solid transparent;
    opacity: 0;
    transform: translateY(-4px);
    transition:
        max-height 0.25s ease,
        border-color 0.2s ease,
        opacity 0.16s ease,
        transform 0.25s ease;
}

.technique-options-toggle {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
}

.technique-options-label {
    width: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    justify-content: center;
    border-radius: 0 5px 5px 0;
    color: var(--text-muted);
    cursor: pointer;
}

.technique-options-label:hover {
    background: var(--surface-hover);
    color: var(--text-secondary);
}

.technique-options-toggle:checked ~ .technique-options-preview {
    max-height: 160px;
    border-color: var(--border);
    opacity: 1;
    transform: translateY(0);
}

.technique-options-toggle:focus-visible ~ .technique-options-label {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.technique-options-panel {
    display: grid;
    gap: 10px;
    padding: 10px;
}

.technique-option-row {
    display: grid;
    gap: 5px;
}

.technique-option-row > span {
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
}

.combination-options-toggle {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
}

.combination-options-label {
    grid-column: 3;
    grid-row: 1;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    line-height: 0.7;
}

.combination-options-label:hover {
    background: var(--surface-active);
    color: var(--text-primary);
}

.combination-options-label span {
    width: 8px;
    height: 8px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translate(-2px, -2px);
    transition: transform 0.2s ease;
}

.combination-options-toggle:checked ~ .combination-options-label span {
    transform: rotate(225deg) translate(-2px, -2px);
}

.combination-options-toggle:focus-visible ~ .combination-options-label {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.combination-options-preview {
    grid-column: 1 / -1;
    max-height: 0;
    overflow: hidden;
    display: grid;
    gap: 8px;
    padding-top: 0;
    border-top: 1px solid transparent;
    opacity: 0;
    transform: translateY(-4px);
    transition:
        max-height 0.25s ease,
        padding-top 0.25s ease,
        border-color 0.2s ease,
        opacity 0.16s ease,
        transform 0.25s ease;
}

.combination-options-toggle:checked ~ .combination-options-preview {
    max-height: 500px;
    padding-top: 10px;
    opacity: 1;
    transform: translateY(0);
}

.combination-option-row {
    display: grid;
    gap: 4px;
}

.combination-option-row > span {
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.combination-option-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.combination-option-buttons button {
    padding: 4px 7px;
    border: 1px solid var(--border);
    border-radius: 3px;
    background: var(--surface);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.68rem;
    text-transform: capitalize;
}

.combination-option-buttons button:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.technique-option-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.technique-option-buttons button {
    padding: 4px 7px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--background);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.68rem;
    text-transform: capitalize;
}

.technique-option-buttons button:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.technique-option-buttons button.selected {
    border-color: var(--accent);
    color: var(--text-primary);
    background: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
    .combination-options-preview,
    .technique-options-preview,
    .combination-options-label span {
        transition: none;
    }
}

/* ==============================
   HOW IT WORKS
============================== */
.how-it-works {
    padding: 70px 0 120px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.step {
    padding: 30px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
}

.step-number {
    display: block;
    margin-bottom: 30px;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
}

.step h3 {
    margin-bottom: 10px;
    font-size: 1.4rem;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==============================
   RESPONSIVE
============================== */

@media (max-width: 850px) {
    .technique-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 700px) {
    .builder {
        padding-top: 30px;
    }

    .combination-header > div {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }

    .combination-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .combination-randomizer-actions,
    .combination-utility-actions {
        width: 100%;
    }

    .combination-randomizer-actions .button {
        flex: 1;
    }

    .combination-utility-actions {
        flex-wrap: wrap;
    }

    .combination-utility-actions #saved-combinations-button {
        flex-grow: 1;
    }

    .saved-combination {
        align-items: flex-start;
        flex-direction: column;
    }

    .technique-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .combination-card {
        padding: 25px;
    }

    .combination {
        justify-content: flex-start;
    }

    .technique {
        width: 100%;
        padding-bottom: 15px;
        border-bottom: 1px solid var(--border);
    }

    .steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 380px) {
    .randomizer-length-inputs {
        grid-template-columns: 1fr;
    }
}