:root {
    --accent-color: #0A3C46;
}
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    width: 100%;
    flex: 1;
    padding: 0 1rem;
}
header {
    padding: 1rem;
    background: var(--accent-color);
    color: #fff;
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
}
button {
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 0.5rem 2rem;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
}
select {
    padding: 0.5rem;
    border-radius: 4px;
}
.systems-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    padding: 1rem;
    gap: 3rem;
}

#systems-container {
    justify-content: center;
}

.options-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.option-block {
    position: relative;
    margin: 0.5rem;
    cursor: pointer;
    width: 300px;
    height: auto;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.option-block img {
    max-width: 300px;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    margin-bottom: 1rem;
}
.option-block.selected {
    outline: 3px solid var(--accent-color);
}
.system-block {
    position: relative;
    margin: 0.5rem;
    cursor: pointer;
    width: 300px;
    height: 240px;
    overflow: hidden;
}
.system-block img {
    width: 100%;
    height: 240px;
    object-fit: contain;
    display: block;
}
.system-block video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 240px;
    object-fit: contain;
    display: none;
}
.system-block:hover video { display: block; }
.system-block.selected {
    outline: 3px solid var(--accent-color);
}
.subsystem-block {
    width: 300px;
    height: auto;
    overflow: visible;
}

.subsystem-block img,
.subsystem-block video {
    width: 100%;
    height: 240px;
    margin-bottom: 1rem;
}
.system-title {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    padding: 0.25rem 0;
    text-align: center;
    font-size: 0.9rem;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    box-sizing: border-box;
}

.option-block .system-title,
.subsystem-block .system-title {
    position: static;
    background: none;
    color: var(--accent-color);
    margin-top: 1rem;
}

.option-block .system-title {
    text-align: left;
}

.subsystem-block .system-title {
    text-align: center;
}
.glass-option .system-title,
.shotlan-option .system-title {
    text-align: center;
}
.steps-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10rem;
    padding: 1rem 0;
    width: 100%;
    position: relative;
}
.step {
    color: #fff;
    cursor: pointer;
    text-align: center;
    position: relative;
    min-width: 110px;
    padding: 0.5rem;
}
.step::before {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid #fff;
    margin: 0 auto 0.25rem;
}
.step.completed::before {
    background: #fff;
}
.steps-bar .step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 50%;
    left: calc(100% + 0.5rem);
    transform: translateY(-50%);
    width: 160px;
    height: 2px;
    background: #fff;
}
.step-name {
    font-size: 0.75rem;
    display: block;
}
.step-value {
    font-size: 0.8rem;
    display: block;
}
.step.active {
    text-decoration: underline;
}
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); display: flex; align-items: center; justify-content: center; z-index: 2000; }
.modal.hidden { display: none; }
.modal-content { background: #fff; padding: 1rem; max-width: 90%; }
footer {
    padding: 2rem 0;
    background: var(--accent-color);
    color: #fff;
    margin-top: auto;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
    align-items: center;
}
.footer-text { max-width: 60%; text-align: left; }
.footer-text h3 { font-size: 2rem; }
.footer-form { flex: 1; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-form .row { display: flex; gap: 0.5rem; }
.footer-form input, .footer-form textarea {
    flex: 1;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #ccc;
}
.footer-form button {
    background: #fff;
    color: var(--accent-color);
    border: none;
    padding: 0.5rem 2rem;
    border-radius: 4px;
    cursor: pointer;
}
@media (max-width: 600px) {
    .container { padding: 0; }
    .systems-container {
        align-items: center;
        justify-content: center;
        text-align: center;
        margin-bottom: 6rem;
    }
    .system-block { width: 90%; height: 240px; }
    .subsystem-block,
    .option-block { width: 90%; }
    .steps-bar { gap: 2rem; }
    .steps-bar .step:not(:last-child)::after { width: 60px; }
    .number-input { width: 90%; pointer-events: none; }
    input[type="range"].range-input { width: 90%; }
    .footer-inner { flex-direction: column; }
    .footer-form .row { flex-direction: column; }
    .footer-text { max-width: 100%; }
    header, footer { display: none; }
    .size-bar,
    .size-bar-header { align-items: center; }
    .range-wrapper { justify-content: center; }
    .button-row { flex-direction: column; gap: 1rem; }
    .button-row button { width: 100%; }
    .next-btn,
    .back-btn {
        padding: 1.5rem 2rem;
        font-size: 1rem;
    }
    .download-btn,
    .calc-submit { margin-right: 0; }
    .modal-buttons {
        flex-direction: column;
    }
    .modal-buttons button {
        width: 100%;
    }
    #calc-modal .modal-content { max-height: 95vh; }
    .calc-form { gap: 1rem; }
    .calc-table { margin: 0; }
    .calc-table th,
    .calc-table td { padding: 0.25rem 0.5rem; }
    .mobile-next { display: block; }
    .currency-note { text-align: center; }
}

.size-bar {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    margin: 0.5rem 0;
    width: 95%;
}

.size-bar-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
}
.number-input {
    width: 80px;
    padding: 0.25rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

input[type="range"].range-input {
    -webkit-appearance: none;
    width: 100%;
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    margin: 0 0.25rem;
}
input[type="range"].range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
}
input[type="range"].range-input::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
}

.range-value {
    color: var(--accent-color);
    font-weight: bold;
    margin-left: 0.5rem;
    min-width: 60px;
    text-align: left;
}

.range-label {
    text-align: left;
    color: var(--accent-color);
    width: 160px;
    margin: 1rem;
}

.range-wrapper {
    display: flex;
    align-items: center;
    width: 95%;
    padding: 0 1rem;
}

.help-icon {
    cursor: pointer;
    position: relative;
    color: var(--accent-color);
    font-weight: bold;
}


h1, h2, h3, h4, h5, h6,
#main-title {
    text-align: center;
}
.section-title {
    color: var(--accent-color);
    margin: 3.5rem 0 2rem;
    font-size: 2rem;
}

.next-btn,
.back-btn {
    padding: 1.5rem 2rem;
    font-size: 1rem;
}

.back-btn {
    background: none;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
}

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

.button-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin: 3rem 0;
    width: 100%;
}

.calc-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
    text-align: left;
}
.calc-table th,
.calc-table td {
    border: 1px solid #ccc;
    padding: 0.25rem 0.5rem;
}
.calc-table .indent td:first-child {
    padding-left: 0;
}
.calc-table .section-header td {
    padding: 0.5rem 0.5rem;
    font-weight: bold;
}
.calc-table .summary td {
    font-weight: bold;
    border-top: 2px solid #ccc;
}
.currency-note {
    font-size: 0.8rem;
    margin: 1rem 0;
}

.hidden { display: none; }

.hint {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

#calc-modal .modal-content {
    width: calc(100% - 2rem);
    margin: 0 1rem;
    text-align: left;
    max-height: 95vh;
    overflow-y: auto;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.calc-form label {
    display: flex;
    flex-direction: column;
    text-align: left;
    color: var(--accent-color);
}

.calc-form .checkbox-label {
    flex-direction: row;
    align-items: center;
}

.calc-form input[type="text"],
.calc-form input[type="tel"] {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.modal-buttons {
    display: flex;
    justify-content: flex-start;
    gap: 1rem;
}

.table-scroll {
    overflow-x: auto;
}

.cancel-btn {
    background: #fff;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    padding: 0.5rem 2rem;
    font-size: 1rem;
    display: inline-block;
    width: auto;
    height: auto;
}

.download-btn {
    padding: 0.5rem 2rem;
    font-size: 1rem;
    margin-right: 1rem;
}
.calc-submit {
    margin-right: 1rem;
}

.mobile-next {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    padding: 1.5rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    font-size: 1.2rem;
    z-index: 1500;
}

.mobile-next:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (min-width: 601px) {
    .next-btn,
    .back-btn,
    .download-btn,
    .calc-submit,
    .cancel-btn {
        padding: 0.75rem 2rem;
    }
    #calc-modal .modal-content {
        width: 800px;
        max-width: 100%;
    }
    .calc-table {
        width: 800px;
        border: 1px solid #ddd;
        border-radius: 6px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        overflow: hidden;
    }
    .calc-table th {
        background: var(--accent-color);
        color: #fff;
        padding: 0.75rem 1rem;
        text-align: left;
        border: none;
    }
    .calc-table td {
        padding: 0.75rem 1rem;
        border: none;
        border-bottom: 1px solid #eee;
    }
    .calc-table tr:last-child td {
        border-bottom: none;
    }
    .calc-table .section-header td {
        background: #f5f5f5;
        padding: 1rem 1rem;
    }
    .calc-table .summary td {
        background: #fafafa;
    }
}