:root {
    --primary-color-start: #11998e;
    --primary-color-end: #38ef7d;
    --secondary-color: #64748b;
    --background-color: #f4f7fc;
    --card-background: #ffffff;
    --text-color-primary: #1e293b;
    --text-color-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-color: rgba(17, 153, 142, 0.1);
    --hover-bg: #f8f9fa;
    --success-bg: #e6f8f5;
    --success-border: #a1e9de;
    --success-text: #0d6b5e;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.main-container {
    width: 100%;
    max-width: 900px;
}

.tool-card {
    background: var(--card-background);
    padding: 30px 40px;
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow-color);
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
}

h1 {
    text-align: center;
    color: var(--text-color-primary);
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 10px 0;
}

.tagline {
    text-align: center;
    color: var(--text-color-secondary);
    font-size: 16px;
    margin: 0 0 30px 0;
}

.main-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.input-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color-primary);
    margin-bottom: 10px;
    display: block;
}

input[type="text"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 18px;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

.input-group-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background-color: var(--hover-bg);
    border-radius: 8px;
}

.input-group-checkbox label {
    margin: 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color-primary);
    cursor: pointer;
}

/* New Styles for Added Features */
.radio-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.radio-group label {
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.advanced-toggle {
    text-align: center;
    margin: -10px 0;
}

.advanced-toggle a {
    color: var(--primary-color-start);
    font-weight: 600;
    text-decoration: none;
    font-size: 14px;
}

.advanced-deductions-panel {
    background: #fafbfc;
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 10px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    transition: all 0.3s ease-in-out;
}

.advanced-deductions-panel.hidden {
    display: none;
}

.input-group.small-input label {
    font-size: 14px;
    margin-bottom: 5px;
}

.input-group.small-input input {
    font-size: 16px;
    padding: 8px 12px;
}

/* Results Panel */
.results-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.recommendation-box {
    padding: 15px 20px;
    border-radius: 10px;
    background-color: var(--success-bg);
    border: 1px solid var(--success-border);
    text-align: center;
    font-weight: 600;
    color: var(--success-text);
    font-size: 16px;
}

.result-comparison {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.result-card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: border-color 0.3s;
}

.result-card h4 {
    margin: 0 0 15px 0;
    font-size: 18px;
    color: var(--text-color-primary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-card .default-tag {
    font-size: 10px;
    font-weight: 600;
    background-color: var(--primary-color-start);
    color: white;
    padding: 3px 8px;
    border-radius: 10px;
    text-transform: uppercase;
}

.result-card p {
    margin: 8px 0;
    color: var(--text-color-secondary);
    font-weight: 500;
    display: flex;
    justify-content: space-between;
}

.result-card p span {
    font-weight: 600;
    color: var(--text-color-primary);
}

.result-card h3.total-tax {
    margin: 15px 0 0;
    padding-top: 10px;
    border-top: 1px dashed var(--border-color);
    display: flex;
    justify-content: space-between;
    font-size: 20px;
    color: var(--primary-color-start);
}

/* Other Sections */
.extra-section,
footer,
.ad-container {
    margin-top: 25px;
}

.ad-container {
    text-align: center;
}

.extra-section {
    background: var(--card-background);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow-color);
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-color-primary);
    margin-bottom: 20px;
    border-bottom: 3px solid var(--primary-color-start);
    padding-bottom: 10px;
}

/* === STYLES FOR "OTHER TOOLS" BUTTONS === */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.tool-button {
    display: block;
    padding: 15px;
    background-color: var(--hover-bg);
    color: var(--primary-color-start);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tool-button:hover {
    background-color: var(--primary-color-start);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 10px var(--shadow-color);
}
/* === END OF STYLES FOR "OTHER TOOLS" === */


.how-to-use-list {
    list-style-type: none;
    padding-left: 0;
    counter-reset: steps-counter;
}

.how-to-use-list li {
    position: relative;
    padding-left: 45px;
    margin-bottom: 15px;
    font-size: 16px;
    color: var(--text-color-secondary);
}

.how-to-use-list li::before {
    counter-increment: steps-counter;
    content: counter(steps-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 30px;
    height: 30px;
    background-color: var(--primary-color-start);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 600;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--text-color-secondary);
    font-size: 14px;
}

@media (max-width: 850px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .advanced-deductions-panel {
        grid-template-columns: 1fr;
    }
}