.ecdc-calculator,
.ecdc-calculator * {
    box-sizing: border-box;
}

.ecdc-calculator {
    --ecdc-page: #f7f8fb;
    --ecdc-surface: #ffffff;
    --ecdc-text: #111827;
    --ecdc-muted: #667085;
    --ecdc-border: #dde3eb;
    --ecdc-line: #d8dee7;
    --ecdc-primary: #304158;
    --ecdc-primary-strong: #1f2b3a;
    --ecdc-success: #14804a;
    --ecdc-danger: #a61b1b;
    --ecdc-focus: rgba(48, 65, 88, 0.28);
    width: 100%;
    max-width: 760px;
    margin: 20px auto;
    padding: clamp(16px, 4vw, 30px);
    color: var(--ecdc-text);
    background: var(--ecdc-page);
    border: 1px solid var(--ecdc-border);
    border-radius: 22px;
    font-family: inherit;
    overflow-wrap: anywhere;
    box-shadow: 0 16px 42px rgba(17, 24, 39, 0.08);
}

.ecdc-calculator.ecdc-dark {
    --ecdc-page: #101827;
    --ecdc-surface: #172235;
    --ecdc-text: #f8fafc;
    --ecdc-muted: #c4ceda;
    --ecdc-border: #2d3b4e;
    --ecdc-line: #38485d;
    --ecdc-primary: #d9e5f2;
    --ecdc-primary-strong: #f8fafc;
    --ecdc-success: #6ee7a8;
    --ecdc-danger: #fecaca;
    --ecdc-focus: rgba(217, 229, 242, 0.28);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.26);
}

.ecdc-header {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 22px;
}

.ecdc-kicker {
    margin: 0 0 8px;
    color: var(--ecdc-muted);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.ecdc-header h2 {
    margin: 0;
    color: var(--ecdc-text);
    font-size: clamp(1.55rem, 6vw, 2.45rem);
    line-height: 1.12;
    text-transform: capitalize;
}

.ecdc-intro {
    max-width: 62ch;
    margin: 10px 0 0;
    color: var(--ecdc-muted);
    font-size: clamp(0.98rem, 2.8vw, 1.08rem);
    line-height: 1.65;
}

.ecdc-theme-toggle,
.ecdc-button {
    appearance: none;
    width: 100%;
    border: 0;
    border-radius: 18px;
    padding: 15px 18px;
    background: var(--ecdc-primary);
    color: #ffffff;
    cursor: pointer;
    font: inherit;
    font-weight: 800;
    line-height: 1.1;
    text-align: center;
    transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.ecdc-theme-toggle {
    background: var(--ecdc-surface);
    color: var(--ecdc-text);
    border: 1px solid var(--ecdc-border);
}

.ecdc-button:hover,
.ecdc-theme-toggle:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(17, 24, 39, 0.12);
}

.ecdc-button:active,
.ecdc-theme-toggle:active {
    transform: translateY(0);
}

.ecdc-button:focus-visible,
.ecdc-theme-toggle:focus-visible,
.ecdc-field input:focus-visible,
.ecdc-field select:focus-visible,
.ecdc-field textarea:focus-visible {
    outline: 3px solid var(--ecdc-focus);
    outline-offset: 3px;
}

.ecdc-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-bottom: clamp(28px, 7vw, 46px);
}

.ecdc-field {
    min-width: 0;
    padding: 16px;
    background: var(--ecdc-surface);
    border: 1px solid var(--ecdc-border);
    border-radius: 18px;
}

.ecdc-field label {
    display: block;
    margin: 0 0 8px;
    color: var(--ecdc-text);
    font-size: 0.98rem;
    font-weight: 800;
    line-height: 1.35;
}

.ecdc-field label span {
    color: var(--ecdc-muted);
    font-size: 0.86rem;
    font-weight: 700;
}

.ecdc-field input,
.ecdc-field select,
.ecdc-field textarea {
    display: block;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    border: 1px solid var(--ecdc-line);
    border-radius: 14px;
    padding: 13px 14px;
    background: var(--ecdc-surface);
    color: var(--ecdc-text);
    font: inherit;
    font-size: 1rem;
    line-height: 1.35;
}

.ecdc-field textarea {
    resize: vertical;
}

.ecdc-field small {
    display: block;
    margin-top: 8px;
    color: var(--ecdc-muted);
    font-size: 0.88rem;
    line-height: 1.45;
}

.ecdc-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    min-width: 0;
    margin-top: 4px;
}

.ecdc-output {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    color: var(--ecdc-text);
}

.ecdc-output h3 {
    margin: 0 0 18px;
    color: var(--ecdc-text);
    font-size: clamp(1.45rem, 5.5vw, 2rem);
    line-height: 1.15;
}

.ecdc-error {
    margin: 0 0 16px;
    padding: 14px 16px;
    border-left: 5px solid var(--ecdc-danger);
    border-radius: 12px;
    background: rgba(166, 27, 27, 0.08);
    color: var(--ecdc-danger);
    font-weight: 800;
    line-height: 1.45;
}

.ecdc-output-row {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    margin: 0;
    padding: clamp(18px, 5vw, 26px) 0;
    border-top: 1px solid var(--ecdc-line);
}

.ecdc-output-main {
    margin-bottom: 4px;
    padding: clamp(22px, 6vw, 30px) 18px;
    border-top: 0;
    border-left: 6px solid var(--ecdc-primary);
    border-radius: 20px;
    background: var(--ecdc-surface);
    box-shadow: 0 12px 30px rgba(17, 24, 39, 0.06);
}

.ecdc-output-label {
    display: block;
    margin-bottom: 8px;
    color: var(--ecdc-muted);
    font-size: clamp(1rem, 3.8vw, 1.24rem);
    font-weight: 800;
    line-height: 1.25;
}

.ecdc-output-value {
    display: block;
    max-width: 100%;
    color: var(--ecdc-text);
    font-size: clamp(1.35rem, 6.3vw, 2.28rem);
    font-weight: 900;
    line-height: 1.16;
    overflow-wrap: anywhere;
}

.ecdc-output-main .ecdc-output-value {
    color: var(--ecdc-success);
}

.ecdc-output-sub {
    display: block;
    margin-top: 8px;
    color: var(--ecdc-muted);
    font-size: clamp(0.94rem, 3.5vw, 1.05rem);
    font-weight: 700;
    overflow-wrap: anywhere;
}

.ecdc-explain {
    margin: 12px 0 0;
    padding: 18px 0;
    border-top: 3px solid var(--ecdc-text);
    color: var(--ecdc-text);
    font-size: clamp(1rem, 3.8vw, 1.15rem);
    font-weight: 700;
    line-height: 1.55;
}

.ecdc-disclaimer {
    margin: 0;
    padding-top: 16px;
    border-top: 1px solid var(--ecdc-line);
    color: var(--ecdc-muted);
    font-size: 0.92rem;
    line-height: 1.6;
}

@media (min-width: 680px) {
    .ecdc-header {
        flex-direction: row;
        align-items: flex-start;
        justify-content: space-between;
    }

    .ecdc-theme-toggle {
        width: auto;
        white-space: nowrap;
    }

    .ecdc-form {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }

    .ecdc-field-full,
    .ecdc-actions {
        grid-column: 1 / -1;
    }

    .ecdc-actions {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}

@media print {
    .ecdc-theme-toggle,
    .ecdc-actions {
        display: none !important;
    }

    .ecdc-calculator {
        max-width: none;
        margin: 0;
        border: 0;
        box-shadow: none;
        background: #ffffff;
        color: #000000;
    }

    .ecdc-output-main {
        box-shadow: none;
    }
}