body {
    background: #f5f6fa;
    font-family: 'Roboto', Arial, sans-serif;
    color: #222831;
    margin: 0;
}

h1,
h2 {
    font-family: 'Montserrat', Arial, sans-serif;
    color: #233045;
    margin-top: 0;
}

.main-flex {
    display: flex;
    gap: 0;
    max-width: 1500px;
    margin: 40px auto 0 auto;
    align-items: flex-start;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 32px #0001;
    background: #fff;
}

.calc-form {
    display: flex;
    width: 100%;
}

.calc-left,
.calc-right {
    background: none;
    box-shadow: none;
    border-radius: 0;
    padding: 38px 40px 38px 40px;
    flex: 1 1 0;
}

.calc-left {
    border-right: 2px solid #f5f6fa;
    min-width: 480px;
    max-width: 850px;
}

.calc-right {
    min-width: 400px;
    max-width: 550px;
}

.calc-field {
    margin-bottom: 18px;
}

.calc-field label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
}

.field-note {
    color: #888;
    font-size: 0.97em;
}

.dims input {
    width: 60px;
    padding: 7px;
    margin: 0 2px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 1em;
}

select,
input[type="number"],
textarea {
    width: 100%;
    padding: 8px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 1em;
    background: #fafcff;
    transition: border-color .15s;
}

select:focus,
input[type="number"]:focus,
textarea:focus {
    border-color: #00b894;
    outline: none;
}

textarea {
    min-height: 38px;
    resize: vertical;
}

.stl-drop {
    border: 2px dashed #00b894;
    background: #fafcff;
    color: #00b894;
    border-radius: 16px;
    text-align: center;
    padding: 28px 6px 16px 6px;
    font-size: 1.15em;
    cursor: pointer;
    transition: .16s;
    outline: none;
}

.stl-drop.dragover,
.stl-drop:focus {
    background: #f0fffa;
    border-color: #009874;
    outline: 2px solid #00b89433;
}

.stl-info {
    color: #555;
    font-size: 1em;
    margin-top: 8px;
    min-height: 22px;
}

.kalk-btn {
    background: #00b894;
    color: #fff;
    border: none;
    border-radius: 32px;
    padding: 14px 0;
    width: 100%;
    font-weight: bold;
    font-size: 1.09em;
    cursor: pointer;
    transition: .2s;
    box-shadow: 0 2px 8px #00b89419;
}

.kalk-btn.secondary-btn {
    background: #233045;
    margin-top: 0;
}

.kalk-btn:hover {
    background: #019874;
}

.kalk-btn.secondary-btn:hover {
    background: #1d2638;
}

.form-actions {
    margin-bottom: 34px;
}

.calc-result {
    background: #f5f6fa;
    border-radius: 14px;
    box-shadow: 0 2px 10px #0001;
    padding: 18px 12px 14px 12px;
    text-align: center;
    font-size: 1.08em;
    margin-top: 22px;
}

.mail-status {
    text-align: center;
    color: #00b894;
    font-size: 1.03em;
    margin-top: 8px;
    min-height: 28px;
}

ul {
    margin-bottom: 0;
}

.right-field {
    margin-bottom: 18px;
}

.right-field label {
    font-weight: 500;
    margin-bottom: 4px;
}

@media (max-width: 1200px) {
    .main-flex {
        gap: 0;
        max-width: 99vw;
    }
    .calc-left,
    .calc-right {
        min-width: 320px;
        padding: 24px 12px;
    }
}

@media (max-width: 800px) {
    .main-flex,
    .calc-form {
        flex-direction: column;
        gap: 0;
        border-radius: 10px;
    }
    .calc-left,
    .calc-right {
        max-width: 100vw;
        min-width: unset;
        padding: 16px 2vw 16px 2vw;
        border-right: none;
    }
}

@media (max-width: 540px) {
    .calc-right,
    .calc-left {
        padding: 10px 1vw 12px 1vw;
    }
    h1 {
        font-size: 1.1em;
    }
    h2 {
        font-size: 1em;
    }
}


/* Pole kontaktu vpravo */

.calc-right input[type="text"],
.calc-right input[type="tel"] {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1.5px solid #ddd;
    font-size: 1.07em;
    background: #fafcff;
    margin-bottom: 4px;
    box-sizing: border-box;
    transition: border-color .15s;
}

.calc-right input[type="text"]:focus,
.calc-right input[type="tel"]:focus {
    border-color: #00b894;
    outline: none;
    background: #f5fffa;
}

.calc-right label {
    font-weight: 500;
    margin-bottom: 3px;
    display: block;
    color: #233045;
}
.calc-right input[type="email"] {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1.5px solid #ddd;
    font-size: 1.07em;
    background: #fafcff;
    margin-bottom: 4px;
    box-sizing: border-box;
    transition: border-color .15s;
}

.calc-right input[type="email"]:focus {
    border-color: #00b894;
    outline: none;
    background: #f5fffa;
}

.calc-right label {
    font-weight: 500;
    margin-bottom: 3px;
    display: block;
    color: #233045;
}
.input-error {
    border-color: #d60c0c !important;
    background: #ffeaea !important;
}