/* ============================================
   LED Screen Calculator — ooo-mega.ru / UCALC style
   Vertical layout, 960px, white background
   ============================================ */

/* --- FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');

/* --- RESET --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* --- VARIABLES --- */
:root {
    --color-accent: #F44336;
    --color-accent-dark: #D32F2F;
    --color-text: #3F4145;
    --color-heading: #242424;
    --color-input-bg: #EFEFEF;
    --color-input-text: #5D5D5D;
    --color-gray: #636363;
    --color-light: #E0E0E0;
    --color-white: #FFFFFF;
    --font-label: 'Roboto', Arial, sans-serif;
    --font-body: 'Roboto', Arial, sans-serif;
    --font-size-base: 14px;
    --max-width: 960px;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-white);
    overflow-y: auto;
    overflow-x: hidden;
}

/* --- CALC WRAPPER --- */
.calc {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

/* ==============================
   3D VIEWPORT
   ============================== */
.calc__viewport {
    position: relative;
    width: 100%;
    height: 420px;
    background: #e8e8e8;
    overflow: hidden;
}

#canvas3d {
    display: block;
    width: 100%;
    height: 100%;
}

/* --- SPECS OVERLAY --- */
.specs {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(0, 0, 0, 0.65);
    color: var(--color-white);
    padding: 10px 14px;
    font-size: 12px;
    line-height: 1.6;
    max-width: 240px;
    pointer-events: none;
    border-radius: 4px;
}

.specs__title {
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 4px;
}

.specs__row {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.specs__label {
    color: #bbb;
}

.specs__value {
    color: var(--color-white);
    text-align: right;
}

.specs__value--accent {
    color: var(--color-accent);
}

/* --- EXPLANATION --- */
.explanation {
    position: absolute;
    bottom: 44px;
    right: 12px;
    background: rgba(0, 0, 0, 0.65);
    color: #ddd;
    padding: 8px 12px;
    font-size: 11px;
    line-height: 1.5;
    max-width: 260px;
    pointer-events: none;
    border-radius: 4px;
}

.explanation__icon {
    color: var(--color-accent);
    margin-right: 4px;
}

/* --- HINT --- */
.hint {
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: #aaa;
    padding: 5px 14px;
    font-size: 10px;
    white-space: nowrap;
    pointer-events: none;
    border-radius: 3px;
}

/* ==============================
   CONTROLS ROW — white bg, UCALC style
   ============================== */
.calc__controls {
    display: flex;
    gap: 40px;
    padding: 30px 24px 24px;
    background: var(--color-white);
    color: var(--color-text);
}

.ctrl-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.ctrl-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ctrl-label {
    font-family: var(--font-label);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-heading);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.ctrl-select {
    width: 100%;
    padding: 10px 40px 10px 12px;
    border: none;
    background: var(--color-input-bg);
    color: var(--color-input-text);
    font-family: var(--font-body);
    font-size: 14px;
    outline: none;
    border-radius: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%235D5D5D'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    cursor: pointer;
    height: 42px;
}

.ctrl-select:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

/* --- CHECKBOX --- */
.ctrl-check {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text);
    cursor: pointer;
    line-height: 1.4;
}

.ctrl-check input[type="checkbox"] {
    accent-color: var(--color-accent);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* --- PITCH SCALE --- */
.pitch-scale {
    display: flex;
    gap: 3px;
    flex-wrap: wrap;
}

.pitch-chip {
    padding: 5px 9px;
    font-size: 12px;
    font-weight: 500;
    background: var(--color-input-bg);
    color: var(--color-input-text);
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 3px;
    transition: all 0.2s;
    text-align: center;
    min-width: 38px;
    user-select: none;
}

.pitch-chip:hover {
    border-color: var(--color-accent);
    background: #fce4e1;
}

.pitch-chip--active {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
    font-weight: 700;
}



/* --- RANGE SLIDER --- */
.range-row {
    display: flex;
    align-items: center;
    gap: 14px;
}

.ctrl-range {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--color-input-bg);
    outline: none;
    border-radius: 2px;
    cursor: pointer;
}

.ctrl-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
}

.ctrl-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
}

.range-val {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-accent);
    min-width: 80px;
    text-align: right;
    white-space: nowrap;
}

.range-minmax {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--color-input-text);
    margin-top: 0;
}

/* ==============================
   DISCLAIMER
   ============================== */
.calc__disclaimer {
    padding: 20px 24px;
    background: var(--color-white);
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    font-style: italic;
}

.calc__disclaimer strong {
    color: var(--color-accent);
    font-style: italic;
}

/* ==============================
   SEPARATOR LINE
   ============================== */
.calc__separator {
    height: 2px;
    background: var(--color-accent);
    margin: 0 24px;
}

/* ==============================
   RESULT ROW
   ============================== */
.calc__result {
    display: flex;
    gap: 40px;
    padding: 20px 24px;
    align-items: flex-start;
    background: var(--color-white);
}

.result-specs {
    flex: 1;
    font-size: 14px;
    line-height: 1.7;
}

.result-specs .rec-pitch {
    color: var(--color-accent);
    font-size: 22px;
    font-weight: 700;
}

.result-specs .rec-row {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid #f0f0f0;
    padding: 4px 0;
}

.result-specs .rec-label {
    color: var(--color-input-text);
}

.result-specs .rec-value {
    font-weight: 700;
    color: var(--color-heading);
}

.result-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    min-width: 200px;
    text-align: right;
}

.result-price__label {
    font-size: 15px;
    font-weight: 700;
    color: rgba(36, 36, 36, 0.7);
}

.result-price__value {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-accent);
    margin: 4px 0;
    white-space: nowrap;
}

.result-price__note {
    font-size: 12px;
    color: #999;
}

/* ==============================
   FORM — white bg, UCALC style
   ============================== */
.calc__form {
    padding: 24px 24px;
    background: var(--color-white);
    color: var(--color-text);
    border-top: 1px solid #eee;
}

.form-row {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
}

.form-row--submit {
    justify-content: flex-end;
    margin-bottom: 8px;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-family: var(--font-label);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-heading);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: var(--color-input-bg);
    color: var(--color-input-text);
    font-family: var(--font-body);
    font-size: 14px;
    outline: none;
    border-radius: 0;
    height: 42px;
}

.form-input:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

.form-input::placeholder {
    color: #999;
}

.form-btn {
    padding: 0 24px;
    height: 42px;
    border: 2px solid var(--color-accent);
    background: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-label);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: 0;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
}

.form-btn:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.form-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-agree {
    text-align: center;
    font-size: 12px;
    color: #999;
    margin-top: 4px;
}

.form-agree a {
    color: var(--color-input-text);
    text-decoration: underline;
}

.form-agree a:hover {
    color: var(--color-accent);
}

/* --- FORM SUCCESS MESSAGE --- */
.form-success {
    text-align: center;
    padding: 24px;
    font-size: 16px;
    color: #4caf50;
}

/* ==============================
   RESPONSIVE
   ============================== */
@media (max-width: 767px) {
    .calc__viewport {
        height: 300px;
    }

    .calc__controls {
        flex-direction: column;
        gap: 20px;
        padding: 20px 16px;
    }

    .ctrl-label,
    .form-label {
        font-size: 15px;
        letter-spacing: 1px;
    }

    .calc__result {
        flex-direction: column;
        padding: 16px;
    }

    .result-price {
        min-width: unset;
        width: 100%;
        align-items: center;
    }

    .form-row {
        flex-direction: column;
        gap: 14px;
    }

    .calc__form {
        padding: 16px;
    }

    .specs {
        top: 6px;
        right: 6px;
        font-size: 10px;
        padding: 8px 10px;
        max-width: 180px;
    }

    .explanation {
        display: none;
    }

    .hint {
        font-size: 9px;
        padding: 4px 8px;
    }
}