/* Paving Calculator - Design Adaptation to Sintez Bruk Style */

:root {
    --calc-white: #ffffff;
    --calc-gray: #f8f9fa;
    --calc-border: rgba(0, 0, 0, 0.08);
    --calc-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.calculator-hero {
    position: relative;
    padding-top: 180px;
    padding-bottom: 80px;
    background-image: url('../img/stat-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: #fff;
    text-align: center;
}

.calculator-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.4));
    z-index: 1;
}

.calculator-hero__inner {
    position: relative;
    top: 30px;
    z-index: 2;
}

.calculator-main {
    padding-top: 60px;
    padding-bottom: 80px;
    background: #fdfdfd;
    min-height: 100vh;
}

@media (max-width: 991px) {
    .calculator-hero {
        padding-top: 140px;
        padding-bottom: 60px;
    }
}

/* Header Section Overlay Fix */
.calc-header h1 {
    font-size: 42px;
    font-weight: 900;
    color: #fff;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.calc-header p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* Main Grid */
.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}

@media (max-width: 991px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }
}

/* Base Panel Style */
.calc-panel {
    background: var(--calc-white);
    border: 1px solid var(--calc-border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--calc-shadow);
}

.calc-panel__title {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--pc-text-soft);
    margin-bottom: 24px;
    display: block;
}

/* Load Type Selector */
.load-types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 30px;
    padding-bottom: 10px; /* Space for shadows and move animation */
}

.type-btn {
    border-radius: 12px;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: var(--pc-transition);
    border: 2px solid transparent;
    background: var(--calc-gray);
    width: 100%;
    overflow: visible; /* Prevent clipping of shadows/borders */
}

.type-btn:hover {
    transform: translateY(-4px);
    background: #fff;
    border-color: rgba(0, 155, 61, 0.1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.type-btn.active {
    background: #fff;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08); /* Changed to more neutral shadow */
    transform: translateY(-4px);
}

.type-btn--pedestrian.active { border-bottom-color: #009b3d !important; }
.type-btn--car.active { border-bottom-color: #373737 !important; }
.type-btn--truck.active { border-bottom-color: #e08b05 !important; }

.type-btn__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 10px;
    transition: var(--pc-transition);
    color: var(--pc-text-soft);
}

.type-btn.active .type-btn__icon {
    background: rgba(0, 155, 61, 0.1);
    color: var(--pc-green);
}

.type-btn--car.active .type-btn__icon { color: var(--pc-dark); }
.type-btn--truck.active .type-btn__icon { color: var(--pc-amber); }

.type-btn__icon svg {
    width: 24px;
    height: 24px;
    stroke-width: 2px;
}

.type-btn__label {
    font-size: 12px;
    font-weight: 700;
    text-align: center;
    line-height: 1.2;
}

/* Layer Bar Visualization */
.layers-vis {
    border-top: 1px solid var(--calc-border);
    padding-top: 24px;
}

.layer-item {
    margin-bottom: 12px;
}

.layer-item:last-child {
    margin-bottom: 0;
}

.layer-item__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.layer-item__label {
    font-size: 12px;
    font-weight: 600;
    color: var(--pc-text-soft);
}

.layer-item__value {
    font-size: 12px;
    font-weight: 700;
    color: var(--pc-dark);
}

.layer-item__bar-wrap {
    height: 8px;
    background: #eee;
    border-radius: 4px;
    overflow: hidden;
}

.layer-item__bar {
    height: 100%;
    border-radius: 4px;
    transition: width 0.4s ease;
}

/* Form Controls */
.calc-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 576px) {
    .calc-form-grid {
        grid-template-columns: 1fr;
    }
}

.input-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-block__label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--pc-text-soft);
}

.input-block__wrapper {
    position: relative;
}

.input-block__wrapper input {
    width: 100%;
    background: var(--calc-gray);
    border: 1px solid var(--calc-border);
    border-radius: 12px;
    padding: 14px 16px;
    padding-right: 45px;
    font-size: 18px;
    font-weight: 700;
    color: var(--pc-dark);
    transition: var(--pc-transition);
}

.input-block__wrapper input:focus {
    outline: none;
    background: #fff;
    border-color: var(--pc-green);
    box-shadow: 0 0 0 4px rgba(0, 155, 61, 0.08);
}

.input-block__unit {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    font-weight: 700;
    color: var(--pc-text-soft);
    opacity: 0.6;
}

.input-block__hint {
    font-size: 11px;
    color: var(--pc-text-soft);
    opacity: 0.7;
    margin-top: 4px;
}

/* Results Cards */
.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (max-width: 576px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
}

.result-card {
    background: var(--calc-gray);
    border: 1px solid var(--calc-border);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    overflow: hidden;
}

.result-card__label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--pc-text-soft);
}

.result-card__main {
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.result-card__value {
    font-size: 26px;
    font-weight: 900;
    color: var(--pc-dark);
    line-height: 1;
}

.result-card__unit {
    font-size: 12px;
    font-weight: 600;
    color: var(--pc-text-soft);
    margin-bottom: 4px;
}

.result-card__accent {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    opacity: 0.4;
}

/* Coefficients */
.coef-block {
    margin-top: 20px;
    background: rgba(0, 0, 0, 0.02);
    border-radius: 12px;
    padding: 16px;
}

.coef-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    margin-bottom: 4px;
}

.coef-row:last-child {
    margin-bottom: 0;
}

.coef-row__key {
    color: var(--pc-text-soft);
}

.coef-row__val {
    font-weight: 700;
    color: var(--pc-dark);
}

/* Buttons */
.print-btn {
    width: 100%;
    border: none;
    border-radius: 16px;
    padding: 18px;
    font-size: 16px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: var(--pc-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.print-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 155, 61, 0.25);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Loader */
.calculator-loader {
    text-align: center;
    padding: 100px;
    font-size: 18px;
    font-weight: 500;
    color: var(--pc-text-soft);
}

/* Footer Adaptation */
.calculator-footer {
    padding: 40px 0;
    text-align: center;
    background: #f8f9fa;
    border-top: 1px solid var(--calc-border);
}

.calculator-footer p {
    font-size: 14px;
    color: var(--pc-text-soft);
}

/* Empty State */
.calc-empty {
    padding: 60px;
    text-align: center;
    border: 2px dashed var(--calc-border);
    border-radius: 20px;
    color: var(--pc-text-soft);
}

.calc-empty__icon svg {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    display: inline-block;
    opacity: 0.2;
    stroke: var(--pc-text-soft);
}

/* Custom Header Fix for Static View */
.site-header--static {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--calc-border);
    position: absolute; /* Revert index.html positioning */
}

.site-header--static .site-nav a {
    color: var(--pc-dark);
}

.site-header--static .site-nav a.active {
    color: var(--pc-green);
}