/* ============================================
   CALCULATOR PAGE STYLES
   Brutalist design for brick calculator
============================================ */

/* ============================================
   CALCULATOR CONTAINER
============================================ */
.calc {
    position: relative;
    padding: 4rem 0;
    background: var(--bg-primary);
    overflow: hidden;
}

.calc__container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   CALCULATOR HEADER
============================================ */
.calc__header {
    text-align: center;
    margin-bottom: 4rem;
    padding: 3rem 0;
}

.calc__badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(196, 92, 38, 0.1);
    border: 1px solid rgba(196, 92, 38, 0.3);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1.5rem;
}

.calc__title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.calc__title-stroke {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 700;
    color: transparent;
    -webkit-text-stroke: 2px var(--accent);
    text-stroke: 2px var(--accent);
    letter-spacing: 0.05em;
}

.calc__title-main {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.1em;
}

.calc__subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ============================================
   CALCULATOR GRID
============================================ */
.calc__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

/* ============================================
   CALCULATOR SECTIONS
============================================ */
.calc-section {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
    position: relative;
}

/* Corner accents */
.calc-section::before,
.calc-section::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    pointer-events: none;
}

.calc-section::before {
    top: -1px;
    left: -1px;
    border-top: 2px solid var(--accent);
    border-left: 2px solid var(--accent);
}

.calc-section::after {
    bottom: -1px;
    right: -1px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    border-right: 2px solid rgba(255, 255, 255, 0.1);
}

.calc-section__header {
    margin-bottom: 1.5rem;
}

.calc-section__number {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    color: transparent;
    -webkit-text-stroke: 1px rgba(255, 255, 255, 0.1);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.calc-section__title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   BRICK SELECTOR
============================================ */
.brick-selector__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: rgba(196, 92, 38, 0.3);
    padding: 2px;
    margin-bottom: 1.5rem;
}

.brick-selector__item {
    background: var(--bg-primary);
    padding: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    text-align: left;
}

.brick-selector__item:hover {
    background: var(--bg-tertiary);
}

.brick-selector__item--selected {
    background: var(--bg-tertiary);
}

.brick-selector__item--selected::before,
.brick-selector__item--selected::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    transition: all 0.3s var(--ease-out-expo);
}

.brick-selector__item--selected::before {
    top: 4px;
    left: 4px;
    border-top: 2px solid var(--accent);
    border-left: 2px solid var(--accent);
}

.brick-selector__item--selected::after {
    bottom: 4px;
    right: 4px;
    border-bottom: 2px solid var(--accent);
    border-right: 2px solid var(--accent);
}

.brick-selector__preview {
    height: 40px;
    display: flex;
    align-items: flex-end;
    margin-bottom: 0.75rem;
}

.brick-selector__brick {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.brick-selector__brick--single {
    width: 50px;
    height: 13px;
}

.brick-selector__brick--thick {
    width: 50px;
    height: 18px;
}

.brick-selector__brick--block {
    width: 60px;
    height: 35px;
}

.brick-selector__brick--block-small {
    width: 50px;
    height: 28px;
}

.brick-selector__brick--build {
    width: 50px;
    height: 13px;
    background: linear-gradient(135deg, #8B4513 0%, #654321 100%);
}

.brick-selector__brick--build-thick {
    width: 50px;
    height: 18px;
    background: linear-gradient(135deg, #8B4513 0%, #654321 100%);
}

.brick-selector__info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.brick-selector__name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.brick-selector__dims {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.brick-selector__selected {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(196, 92, 38, 0.1);
    border: 1px solid rgba(196, 92, 38, 0.2);
}

.brick-selector__selected-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.brick-selector__selected-name {
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.brick-selector__selected-price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--accent);
}

.brick-selector__selected-price strong {
    font-size: 1.1rem;
}

/* ============================================
   DIMENSION INPUTS
============================================ */
.dimension-inputs {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dimension-input {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem;
}

.dimension-input__grid {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.5;
    pointer-events: none;
}

.dimension-input__label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.dimension-input__wrapper {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
}

.dimension-input__field {
    flex: 1;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--accent);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.75rem;
    font-weight: 600;
    padding: 0.25rem 0;
    outline: none;
    width: 100%;
}

.dimension-input__field:focus {
    border-bottom-color: var(--accent-light);
}

.dimension-input__unit {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

/* ============================================
   SEGMENT SELECTOR
============================================ */
.segment-selector {
    margin-bottom: 1.5rem;
}

.segment-selector__label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.segment-selector__track {
    display: flex;
    gap: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.segment-selector__option {
    flex: 1;
    padding: 0.75rem 0.5rem;
    background: var(--bg-primary);
    border: none;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    text-align: center;
}

.segment-selector__option:last-child {
    border-right: none;
}

.segment-selector__option:hover {
    background: var(--bg-tertiary);
}

.segment-selector__option--active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.segment-selector__option--active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

.segment-selector__value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
}

.segment-selector__desc {
    display: block;
    font-size: 0.65rem;
    color: var(--text-dark);
    margin-top: 0.25rem;
}

.segment-selector__option--active .segment-selector__desc {
    color: var(--text-muted);
}

/* ============================================
   DEDUCTION GROUPS
============================================ */
.deduction-group {
    position: relative;
    padding: 1.25rem;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 1rem;
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 0 100%);
}

.deduction-group::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 15px;
    height: 15px;
    background: linear-gradient(135deg, var(--accent) 50%, transparent 50%);
}

.deduction-group__header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.deduction-group__header svg {
    width: 18px;
    height: 18px;
    stroke: var(--accent);
}

.deduction-group__row {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
}

.deduction-group__field {
    flex: 1;
    position: relative;
}

.deduction-group__label {
    display: block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.deduction-group__input {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    padding: 0.5rem;
    text-align: center;
    outline: none;
}

.deduction-group__input:focus {
    border-color: var(--accent);
}

.deduction-group__unit {
    position: absolute;
    right: 0.5rem;
    bottom: 0.5rem;
    font-size: 0.7rem;
    color: var(--text-dark);
}

.deduction-group__multiply {
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 300;
    padding-bottom: 0.5rem;
}

/* ============================================
   RESERVE SELECTOR
============================================ */
.reserve-selector {
    margin-top: 1.5rem;
}

.reserve-selector__label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.reserve-selector__track {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
}

.reserve-selector__option {
    padding: 0.75rem 0.5rem;
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    text-align: center;
}

.reserve-selector__option:hover {
    background: var(--bg-tertiary);
}

.reserve-selector__option--active {
    background: rgba(196, 92, 38, 0.2);
    border-color: var(--accent);
    color: var(--text-primary);
}

.reserve-selector__option--active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
}

.reserve-selector__value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
}

.reserve-selector__desc {
    display: block;
    font-size: 0.6rem;
    color: var(--text-dark);
    margin-top: 0.25rem;
}

.reserve-selector__option--active .reserve-selector__desc {
    color: var(--accent);
}

/* ============================================
   CALCULATE BUTTON
============================================ */
.calc__action {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
}

.calculate-btn {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 3rem;
    background: var(--accent);
    color: #fff;
    border: none;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
    clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.calculate-btn:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(196, 92, 38, 0.4);
}

.calculate-btn__icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s var(--ease-out-expo);
}

.calculate-btn:hover .calculate-btn__icon {
    transform: translateX(5px);
}

.calculate-btn--processing {
    background: var(--bg-secondary);
    color: var(--accent);
    pointer-events: none;
}

.calculate-btn--processing::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(196, 92, 38, 0.3), transparent);
    animation: processingSwipe 1s linear infinite;
}

@keyframes processingSwipe {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ============================================
   RESULTS PANEL
============================================ */
.results-panel {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0;
    margin-bottom: 4rem;
    overflow: hidden;
}

/* Corner accents */
.results-panel__corner {
    position: absolute;
    width: 20px;
    height: 20px;
    z-index: 2;
}

.results-panel__corner--tl {
    top: 0;
    left: 0;
    border-top: 3px solid var(--accent);
    border-left: 3px solid var(--accent);
}

.results-panel__corner--tr {
    top: 0;
    right: 0;
    border-top: 3px solid var(--accent);
    border-right: 3px solid var(--accent);
}

.results-panel__corner--bl {
    bottom: 0;
    left: 0;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
    border-left: 3px solid rgba(255, 255, 255, 0.1);
}

.results-panel__corner--br {
    bottom: 0;
    right: 0;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
    border-right: 3px solid rgba(255, 255, 255, 0.1);
}

.results-panel__header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.results-panel__header-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(196, 92, 38, 0.5), transparent);
}

.results-panel__header-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    color: var(--text-muted);
}

.results-panel__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: rgba(255, 255, 255, 0.05);
}

.result-card {
    background: var(--bg-secondary);
    padding: 2rem 1.5rem;
    text-align: center;
    position: relative;
}

.result-card__icon {
    width: 32px;
    height: 32px;
    margin: 0 auto 1rem;
    color: var(--text-dark);
}

.result-card__icon svg {
    width: 100%;
    height: 100%;
}

.result-card__value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    color: transparent;
    -webkit-text-stroke: 2px var(--accent);
    line-height: 1;
    margin-bottom: 0.5rem;
    transition: all 0.5s var(--ease-out-expo);
}

.result-card__value--filled {
    color: var(--accent);
    -webkit-text-stroke: 2px var(--accent);
}

.result-card__unit {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.result-card__label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dark);
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Primary result (cost) */
.result-card--primary {
    background: rgba(196, 92, 38, 0.1);
}

.result-card--primary .result-card__value {
    font-size: 2.75rem;
    color: var(--accent);
    -webkit-text-stroke: none;
}

.result-card--primary .result-card__icon {
    color: var(--accent);
}

.results-panel__cta {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.results-panel__note {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

/* ============================================
   REFERENCE TABLE
============================================ */
.calc__table-section {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
    position: relative;
}

.calc__table-section::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    width: 15px;
    height: 15px;
    border-top: 2px solid var(--accent);
    border-left: 2px solid var(--accent);
}

.calc__table-header {
    margin-bottom: 1.5rem;
}

.calc__table-header h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.calc__table-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.calc__table-wrapper {
    overflow-x: auto;
}

.calc__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.calc__table th,
.calc__table td {
    padding: 1rem;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.calc__table th {
    background: var(--bg-primary);
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.calc__table td {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary);
}

.calc__table td:first-child {
    font-family: var(--font-body);
    color: var(--text-muted);
}

.calc__table tr:hover td {
    background: rgba(196, 92, 38, 0.05);
}

/* ============================================
   SIMPLE FOOTER
============================================ */
.footer--simple {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
}

.footer--simple .footer__content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.footer--simple .footer__brand p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.footer--simple .footer__phone {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    color: var(--accent);
    transition: color 0.3s;
}

.footer--simple .footer__phone:hover {
    color: var(--accent-light);
}

.footer--simple .footer__copy {
    max-width: 1400px;
    margin: 0 auto;
    color: var(--text-dark);
    font-size: 0.75rem;
    text-align: center;
}

/* ============================================
   HEADER DARK VARIANT
============================================ */
.header--dark {
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* ============================================
   CALCULATOR TABS
============================================ */
.calc-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 3rem;
    position: relative;
}

.calc-tabs::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.05);
}

.calc-tab-btn {
    position: relative;
    padding: 1rem 2.5rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: none;
    color: var(--text-muted);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 1;
}

.calc-tab-btn:first-child {
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.calc-tab-btn:last-child {
    clip-path: polygon(0 12px, 12px 0, 100% 0, 100% 100%, 0 100%);
}

.calc-tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.calc-tab-btn--active {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.calc-tab-btn--active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
}

.calc-tab-btn__icon {
    display: inline-block;
    width: 18px;
    height: 18px;
    margin-right: 0.5rem;
    vertical-align: middle;
}

.calc-tab-panel {
    display: none;
}

.calc-tab-panel--active {
    display: block;
}

/* ============================================
   GYPSUM SELECTOR
============================================ */
.gypsum-selector__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    background: rgba(100, 150, 100, 0.3);
    padding: 2px;
    margin-bottom: 1.5rem;
}

.gypsum-selector__item {
    background: var(--bg-primary);
    padding: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    text-align: left;
}

.gypsum-selector__item:hover {
    background: var(--bg-tertiary);
}

.gypsum-selector__item--selected {
    background: var(--bg-tertiary);
}

.gypsum-selector__item--selected::before,
.gypsum-selector__item--selected::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    transition: all 0.3s var(--ease-out-expo);
}

.gypsum-selector__item--selected::before {
    top: 4px;
    left: 4px;
    border-top: 2px solid #6a9a5b;
    border-left: 2px solid #6a9a5b;
}

.gypsum-selector__item--selected::after {
    bottom: 4px;
    right: 4px;
    border-bottom: 2px solid #6a9a5b;
    border-right: 2px solid #6a9a5b;
}

.gypsum-selector__preview {
    height: 40px;
    display: flex;
    align-items: center;
    margin-bottom: 0.75rem;
}

.gypsum-selector__sheet {
    width: 28px;
    height: 36px;
    border: 2px solid;
    border-radius: 1px;
    position: relative;
}

.gypsum-selector__sheet--gkl {
    border-color: #9a9a9a;
    background: linear-gradient(135deg, rgba(200, 200, 200, 0.15) 0%, rgba(150, 150, 150, 0.08) 100%);
}

.gypsum-selector__sheet--gklv {
    border-color: #6a9a5b;
    background: linear-gradient(135deg, rgba(106, 154, 91, 0.2) 0%, rgba(80, 120, 70, 0.1) 100%);
}

.gypsum-selector__sheet-thick {
    position: absolute;
    bottom: 2px;
    right: 2px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.55rem;
    color: var(--text-muted);
}

.gypsum-selector__info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.gypsum-selector__name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.gypsum-selector__dims {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.gypsum-selector__badge {
    display: inline-block;
    font-size: 0.55rem;
    padding: 0.15rem 0.4rem;
    background: rgba(106, 154, 91, 0.15);
    color: #6a9a5b;
    border: 1px solid rgba(106, 154, 91, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

.gypsum-selector__selected {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(106, 154, 91, 0.1);
    border: 1px solid rgba(106, 154, 91, 0.2);
}

.gypsum-selector__selected-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.gypsum-selector__selected-name {
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.gypsum-selector__selected-area {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: #6a9a5b;
}

/* Gypsum accent overrides */
.calc-tab-panel--gypsum .calc-section::before {
    border-top-color: #6a9a5b;
    border-left-color: #6a9a5b;
}

.calc-tab-panel--gypsum .dimension-input__field {
    border-bottom-color: #6a9a5b;
}

.calc-tab-panel--gypsum .dimension-input__field:focus {
    border-bottom-color: #7db36a;
}

.calc-tab-panel--gypsum .segment-selector__option--active::before {
    background: linear-gradient(90deg, #6a9a5b, #7db36a);
}

.calc-tab-panel--gypsum .reserve-selector__option--active {
    background: rgba(106, 154, 91, 0.2);
    border-color: #6a9a5b;
}

.calc-tab-panel--gypsum .reserve-selector__option--active::after {
    background: #6a9a5b;
}

.calc-tab-panel--gypsum .reserve-selector__option--active .reserve-selector__desc {
    color: #6a9a5b;
}

.calc-tab-panel--gypsum .calculate-btn {
    background: #6a9a5b;
}

.calc-tab-panel--gypsum .calculate-btn:hover {
    background: #7db36a;
    box-shadow: 0 10px 40px rgba(106, 154, 91, 0.4);
}

.calc-tab-panel--gypsum .calculate-btn--processing {
    background: var(--bg-secondary);
    color: #6a9a5b;
}

.calc-tab-panel--gypsum .calculate-btn--processing::before {
    background: linear-gradient(90deg, transparent, rgba(106, 154, 91, 0.3), transparent);
}

.calc-tab-panel--gypsum .results-panel__corner--tl,
.calc-tab-panel--gypsum .results-panel__corner--tr {
    border-color: #6a9a5b;
}

.calc-tab-panel--gypsum .results-panel__header-line {
    background: linear-gradient(90deg, transparent, rgba(106, 154, 91, 0.5), transparent);
}

.calc-tab-panel--gypsum .result-card__value {
    -webkit-text-stroke-color: #6a9a5b;
}

.calc-tab-panel--gypsum .result-card__value--filled {
    color: #6a9a5b;
    -webkit-text-stroke-color: #6a9a5b;
}

.calc-tab-panel--gypsum .deduction-group::before {
    background: linear-gradient(135deg, #6a9a5b 50%, transparent 50%);
}

.calc-tab-panel--gypsum .deduction-group__header svg {
    stroke: #6a9a5b;
}

.calc-tab-panel--gypsum .deduction-group__multiply {
    color: #6a9a5b;
}

.calc-tab-panel--gypsum .deduction-group__input:focus {
    border-color: #6a9a5b;
}

.calc-tab-panel--gypsum .calc__table tr:hover td {
    background: rgba(106, 154, 91, 0.05);
}

.calc-tab-panel--gypsum .calc__table-section::before {
    border-top-color: #6a9a5b;
    border-left-color: #6a9a5b;
}

/* Gypsum results: 5 columns */
.results-panel--gypsum .results-panel__grid {
    grid-template-columns: repeat(5, 1fr);
}

/* Layers selector */
.layers-selector {
    margin-bottom: 1.5rem;
}

.layers-selector__label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.layers-selector__track {
    display: flex;
    gap: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.layers-selector__option {
    flex: 1;
    padding: 0.75rem 0.5rem;
    background: var(--bg-primary);
    border: none;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    text-align: center;
}

.layers-selector__option:last-child {
    border-right: none;
}

.layers-selector__option:hover {
    background: var(--bg-tertiary);
}

.layers-selector__option--active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.layers-selector__option--active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #6a9a5b, #7db36a);
}

.layers-selector__value {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
}

.layers-selector__desc {
    display: block;
    font-size: 0.65rem;
    color: var(--text-dark);
    margin-top: 0.25rem;
}

.layers-selector__option--active .layers-selector__desc {
    color: var(--text-muted);
}

/* ============================================
   RESPONSIVE STYLES
============================================ */
@media (max-width: 1200px) {
    .calc__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .calc-section--deductions {
        grid-column: span 2;
    }

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

    .results-panel--gypsum .results-panel__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .calc {
        padding-top: 0px;
    }

    .calc__container {
        padding: 0 1rem;
    }

    .calc__header {
        margin-bottom: 2rem;
        padding: 2rem 0;
    }

    .calc__grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .calc-section--deductions {
        grid-column: span 1;
    }

    .calc-section {
        padding: 1.5rem;
    }

    .brick-selector__grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .segment-selector__track {
        flex-wrap: wrap;
    }

    .segment-selector__option {
        flex: 1 1 auto;
        min-width: calc(33.333% - 1px);
    }

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

    .results-panel--gypsum .results-panel__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-card {
        padding: 1.5rem 1rem;
    }

    .result-card__value {
        font-size: 2rem;
    }

    .result-card--primary .result-card__value {
        font-size: 2.25rem;
    }

    .calc-tabs {
        gap: 0;
    }

    .calc-tab-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.7rem;
        letter-spacing: 0.05em;
    }

    .calc-tab-btn__icon {
        display: none;
    }

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

    .footer--simple .footer__content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .calc__title-stroke {
        -webkit-text-stroke: 1.5px var(--accent);
    }

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

    .segment-selector__option {
        min-width: calc(50% - 1px);
    }

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

    .results-panel__grid {
        grid-template-columns: 1fr;
    }

    .results-panel--gypsum .results-panel__grid {
        grid-template-columns: 1fr;
    }

    .calculate-btn {
        width: 100%;
        justify-content: center;
    }

    .calc__table {
        font-size: 0.75rem;
    }

    .calc__table th,
    .calc__table td {
        padding: 0.75rem 0.5rem;
    }
}