* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --lime: hsl(61, 70%, 52%);
    --red: hsl(4, 69%, 50%);
    --white: hsl(0, 0%, 100%);
    --slate-100: hsl(202, 86%, 94%);
    --slate-300: hsl(203, 41%, 72%);
    --slate-500: hsl(200, 26%, 54%);
    --slate-700: hsl(200, 24%, 40%);
    --slate-900: hsl(202, 55%, 16%);
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 16px;
    background-color: var(--slate-100);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: var(--white);
    border-radius: 24px;
    overflow: hidden;
    max-width: 1008px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    box-shadow: 0 32px 64px rgba(0, 0, 0, 0.1);
}

.form-section {
    padding: 40px;
}

.form-header {
    margin-bottom: 40px;
}

.form-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 8px;
}

.clear-btn {
    background: none;
    border: none;
    color: var(--slate-700);
    text-decoration: underline;
    cursor: pointer;
    font-size: 16px;
    font-family: inherit;
    transition: color 0.3s ease;
}

.clear-btn:hover {
    color: var(--slate-900);
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    color: var(--slate-700);
    margin-bottom: 12px;
    font-weight: 500;
}

.input-wrapper {
    position: relative;
    display: flex;
    border: 1px solid var(--slate-300);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.input-wrapper:hover {
    border-color: var(--slate-700);
}

.input-wrapper.focused {
    border-color: var(--lime);
}

.input-wrapper.error {
    border-color: var(--red);
}

.input-prefix,
.input-suffix {
    background: var(--slate-100);
    padding: 12px 16px;
    color: var(--slate-700);
    font-weight: 700;
    display: flex;
    align-items: center;
}

.form-input {
    flex: 1;
    border: none;
    padding: 12px 16px;
    font-size: 18px;
    font-weight: 700;
    color: var(--slate-900);
    font-family: inherit;
    outline: none;
}

.form-input::placeholder {
    color: var(--slate-500);
}

.error-message {
    color: var(--red);
    font-size: 14px;
    margin-top: 8px;
    display: none;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-option {
    position: relative;
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border: 1px solid var(--slate-300);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.radio-option:hover {
    border-color: var(--lime);
}

.radio-option.selected {
    border-color: var(--lime);
    background-color: hsl(61, 70%, 52%, 0.1);
}

.radio-input {
    margin-right: 16px;
    width: 20px;
    height: 20px;
    border: 2px solid var(--slate-300);
    border-radius: 50%;
    position: relative;
    cursor: pointer;
}

.radio-input::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--lime);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.radio-option.selected .radio-input {
    border-color: var(--lime);
}

.radio-option.selected .radio-input::before {
    opacity: 1;
}

.radio-label {
    font-weight: 700;
    color: var(--slate-900);
    cursor: pointer;
}

.calculate-btn {
    width: 100%;
    background: var(--lime);
    border: none;
    padding: 16px;
    border-radius: 32px;
    font-size: 18px;
    font-weight: 700;
    color: var(--slate-900);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: background-color 0.3s ease;
    margin-top: 40px;
}

.calculate-btn:hover {
    background: hsl(61, 70%, 45%);
}

.calculate-icon {
    width: 24px;
    height: 24px;
}

.results-section {
    background: var(--slate-900);
    padding: 40px;
    color: var(--white);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.empty-results {
    text-align: center;
}

.empty-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.empty-description {
    color: var(--slate-300);
    line-height: 1.5;
}

.completed-results {
    display: none;
    width: 100%;
}

.results-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.results-description {
    color: var(--slate-300);
    margin-bottom: 40px;
    line-height: 1.5;
}

.results-card {
    background: hsl(202, 55%, 8%);
    border-radius: 8px;
    border-top: 4px solid var(--lime);
    padding: 32px;
}

.monthly-payment {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--slate-700);
}

.payment-label {
    color: var(--slate-300);
    margin-bottom: 8px;
}

.payment-amount {
    font-size: 56px;
    font-weight: 700;
    color: var(--lime);
    line-height: 1;
}

.total-payment .payment-amount {
    font-size: 24px;
    color: var(--white);
}

.grid-cols-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.grid-cols-2 .form-group {
    min-width: 0;
    /* Allow flex items to shrink */
}

.grid-cols-2 .input-wrapper {
    width: 100%;
    min-width: 0;
    /* Ensure inputs can shrink */
}

.grid-cols-2 .form-input {
    min-width: 0;
    /* Allow input to shrink below its content width */
    width: 100%;
}

.attribution {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    text-align: center;
    color: var(--slate-700);
}

.attribution a {
    color: hsl(228, 45%, 44%);
}

@media (max-width: 900px) {
    .grid-cols-2 {
        gap: 16px;
    }

    .input-prefix,
    .input-suffix {
        padding: 12px 14px;
        font-size: 16px;
    }

    .form-input {
        padding: 12px 14px;
        font-size: 16px;
    }
}

@media (max-width: 800px) {
    .grid-cols-2 {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
        border-radius: 0;
        max-width: none;
        min-height: 100vh;
    }

    .form-section,
    .results-section {
        padding: 32px 24px;
    }

    .form-title {
        font-size: 20px;
    }

    .payment-amount {
        font-size: 40px;
    }

    .radio-group {
        gap: 8px;
    }
}

@media (max-width: 600px) {

    .input-prefix,
    .input-suffix {
        padding: 12px 12px;
        font-size: 14px;
    }

    .form-input {
        padding: 12px 12px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {

    .input-prefix,
    .input-suffix {
        padding: 10px 10px;
        font-size: 14px;
    }

    .form-input {
        padding: 10px 10px;
        font-size: 15px;
    }

    .grid-cols-2 {
        gap: 12px;
    }
}