/* --- Core Variables & Base Styles --- */
:root {
    --primary-color: #005A9C; /* LIC Deep Blue */
    --secondary-color: #00AEEF; /* LIC Light Blue */
    --accent-color: #FFD700; /* LIC Gold */
    --success-color: #28a745;
    --danger-color: #dc3545;
    --light-gray: #f8f9fa;
    --border-color: #e0e6ed;
    --card-bg-color: #ffffff;
    --text-color: #333;
    --label-color: #555;
    --body-bg-color: #f4f7fc;
    --shadow: 0 10px 25px rgba(0, 90, 156, 0.08);
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--body-bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
}

.tool-page-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
}

.card {
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background-color: var(--light-gray);
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.25rem;
    color: var(--primary-color);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-body { padding: 1.5rem; }
.content-list ul, .content-list ol { padding-left: 20px; }
.content-list li { margin-bottom: 1rem; }

/* --- Header --- */
.page-header { text-align: center; margin-bottom: 2.5rem; }
.page-header h1 { font-size: 2.8rem; font-weight: 700; color: var(--primary-color); margin-bottom: 0.5rem; }
.page-header .subtitle { font-size: 1.2rem; color: var(--label-color); max-width: 750px; margin: 0 auto; }
.last-updated { font-size: 0.9rem; color: #999; margin-top: 1rem; }

/* --- Main Layout --- */
.main-content { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; align-items: flex-start; }
.calculator-container { position: sticky; top: 2rem; }

/* --- Calculator Form --- */
.calculator { padding: 1.5rem; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.5rem; color: var(--label-color); font-size: 0.95rem; }
.form-group small { font-size: 0.8rem; color: #888; margin-top: 0.25rem; display: block; }

.input-with-stepper { display: flex; align-items: center; }
.input-with-stepper .input-with-icon { flex-grow: 1; border-radius: 8px; }
.input-with-stepper .stepper-btn { background-color: #eef2f7; border: 1px solid var(--border-color); color: var(--primary-color); font-size: 1.2rem; font-weight: 600; cursor: pointer; padding: 0.5rem; width: 45px; height: 48px; transition: background-color 0.2s; border-radius: 8px; }
.input-with-stepper .stepper-btn:first-of-type { margin-right: 0.5rem; }
.input-with-stepper .stepper-btn:last-of-type { margin-left: 0.5rem; }
.input-with-stepper .stepper-btn:hover { background-color: #d1d9e3; }

.input-with-icon { display: flex; align-items: center; border: 1px solid var(--border-color); border-radius: 8px; transition: all 0.3s; background-color: #fff; }
.input-with-icon:focus-within { border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(0, 90, 156, 0.1); }
.input-with-icon i { padding: 12px; min-width: 45px; text-align: center; color: white; border-top-left-radius: 7px; border-bottom-left-radius: 7px; }
.input-with-icon .icon-blue { background-color: #3B82F6; }
.input-with-icon .icon-green { background-color: #10B981; }
.input-with-icon .icon-gold { background-color: #F59E0B; }
.input-with-icon input, .input-with-icon select.input-select { flex: 1; border: none; outline: none; padding: 12px; font-size: 1rem; background: transparent; width: 100%; -moz-appearance: none; appearance: none; }
.input-with-icon input::-webkit-outer-spin-button, .input-with-icon input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.slider { -webkit-appearance: none; width: 100%; height: 8px; background: #e2e8f0; border-radius: 5px; outline: none; margin-top: 1rem; transition: opacity .2s; }
.slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; background: var(--primary-color); cursor: pointer; border-radius: 50%; }
.slider::-moz-range-thumb { width: 20px; height: 20px; background: var(--primary-color); cursor: pointer; border-radius: 50%; }

.radio-group { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 0.5rem; }
.radio-group label { display: flex; align-items: center; gap: 0.5rem; padding: 0.75rem; border: 1px solid var(--border-color); border-radius: 8px; cursor: pointer; transition: all 0.3s; }
.radio-group label:hover { background-color: #f5faff; }
.radio-group input[type="radio"]:checked + div { color: var(--primary-color); font-weight: 600; }
.radio-group input[type="radio"] { display: none; }
.radio-group div { display: flex; align-items: center; gap: 0.75rem; }
.radio-group i { color: var(--secondary-color); font-size: 1.2rem; }

.form-actions { display: flex; gap: 1rem; margin-top: 1.5rem; }
.btn { padding: 0.75rem 1.5rem; border-radius: 8px; border: none; font-weight: 600; cursor: pointer; transition: all 0.3s; display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; }
.btn-primary { background-color: var(--primary-color); color: #fff; }
.btn-primary:hover { background-color: #004a80; transform: translateY(-2px); }
.btn-secondary { background-color: #e2e8f0; color: var(--label-color); }
.btn-secondary:hover { background-color: #d1d9e3; }
.btn-edit { background: none; border: 1px solid var(--border-color); color: var(--primary-color); padding: 0.3rem 0.8rem; border-radius: 6px; font-size: 0.9rem; font-weight: 600; cursor: pointer; }
.btn-edit:hover { background-color: #eef2f7; }
.error-box { background-color: #fff5f5; color: #c53030; margin-top: 1.5rem; padding: 1rem; font-weight: 600; border-radius: 8px; border: 1px solid #f56565; }

/* --- Results & Tabs --- */
.results-tabs { padding: 0 1.5rem; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
.tab-btn-group { display: flex; gap: 0.5rem; }
.tab-btn { background: none; border: none; padding: 0.75rem 1.25rem; cursor: pointer; font-size: 1rem; font-weight: 600; color: var(--label-color); border-bottom: 3px solid transparent; margin-bottom: -1px; }
.tab-btn.active { color: var(--primary-color); border-bottom-color: var(--primary-color); }
.tab-panel { display: none; padding: 1.5rem; }
.tab-panel.active { display: block; animation: fadeIn 0.5s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.summary-grid-3-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
.result-box { background-color: var(--light-gray); padding: 1.5rem; border-radius: 12px; text-align: center; }
.result-box p { margin: 0 0 0.5rem 0; font-weight: 600; color: var(--label-color); }
.result-box .subtitle { font-size: 0.85rem; color: #777; font-weight: 400; }
.result-box .value { font-size: 1.8rem; font-weight: 700; color: var(--primary-color); }
.premium-box .value { color: var(--danger-color); }
.maturity-box { background-color: #f0fff4; grid-column: 1 / -1; }
.maturity-box .value { color: var(--success-color); font-size: 2.5rem; }
.disclaimer { margin-top: 1.5rem; padding: 1rem; background-color: #fffbeb; border-radius: 8px; font-size: 0.9rem; color: #b45309; text-align: center; }

.table-container { overflow-x: auto; border: 1px solid var(--border-color); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(--border-color); white-space: nowrap; }
th { background-color: var(--light-gray); position: sticky; top: 0; font-weight: 600; color: var(--primary-color); }
tr:last-child td { border-bottom: none; }
tr:nth-child(even) { background-color: #fdfdfd; }

.chart-wrapper { max-width: 450px; min-height: 400px; margin: 0 auto; }

/* --- FAQ --- */
.faq-content { padding: 0 1.5rem 1.5rem; }
.faq-item { border-bottom: 1px solid var(--border-color); padding: 1rem 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item summary { font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    content: "\f078";
    transition: transform 0.3s ease-in-out;
    color: var(--secondary-color);
}
.faq-item[open] > summary::after { transform: rotate(180deg); }
.faq-item div { padding-top: 1rem; }

/* --- Language Switchers --- */
.section-lang-switcher, .floating-lang-switcher { display: flex; }
.lang-btn { background-color: #eef2f7; border: 1px solid var(--border-color); color: var(--label-color); padding: 0.3rem 0.7rem; font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: all 0.3s; }
.lang-btn:first-child { border-top-left-radius: 6px; border-bottom-left-radius: 6px; }
.lang-btn:last-child { border-top-right-radius: 6px; border-bottom-right-radius: 6px; border-left: none; }
.lang-btn.active { background-color: var(--primary-color); color: #fff; border-color: var(--primary-color); }

.floating-lang-switcher { position: fixed; bottom: 20px; right: 20px; z-index: 1000; box-shadow: var(--shadow); border-radius: 8px; overflow: hidden; }
.floating-lang-switcher .lang-btn { padding: 0.5rem 1rem; font-size: 0.9rem; }


/* --- Responsive --- */
@media (max-width: 1200px) {
    .main-content { grid-template-columns: 1fr; }
    .calculator-container { position: static; }
}
@media (max-width: 768px) {
    .page-header h1 { font-size: 2.2rem; }
    .summary-grid-3-col { grid-template-columns: 1fr; }
    .maturity-box { grid-column: auto; }
    .results-tabs { flex-direction: column; align-items: flex-start; gap: 1rem; }
}
@media (max-width: 480px) {
    .tool-page-container {
        padding: 1rem;
    }
    .page-header h1 {
        font-size: 1.8rem;
    }
    .page-header .subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    .card-header h2 {
        font-size: 1.1rem;
    }
    .results-tabs {
        gap: 0.5rem;
    }
    .tab-btn {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
    .result-box .value {
        font-size: 1.6rem;
    }
    .maturity-box .value {
        font-size: 2.2rem;
    }
    .form-group {
        margin-bottom: 1.25rem;
    }
}