/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    --color-bg: #ffffff;
    --color-bg-subtle: #fafafa;
    --color-text-primary: #222221;
    --color-text-secondary: #898683;
    --color-button-bg: #160F0C;
    --color-button-text: #ffffff;
    --color-accent: #2563eb;
    --color-success: #059669;
    --color-warning: #d97706;
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* ========================================
   Calculator Container
   ======================================== */
.calculator-container {
    max-width: 680px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   Header
   ======================================== */
.calc-header {
    margin-bottom: 3rem;
}

.back-link {
    display: inline-block;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    margin-bottom: 2rem;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--color-text-primary);
}

.calc-title {
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
}

.calc-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}

/* Terminology Help */
.terminology-help {
    margin-top: 1.5rem;
}

.help-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--color-text-secondary);
    background: var(--color-bg-subtle);
    border: 1px solid #e5e5e5;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.help-toggle:hover {
    color: var(--color-text-primary);
    border-color: var(--color-text-secondary);
}

.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-button-text);
    background: var(--color-button-bg);
    border-radius: 50%;
}

.help-content {
    display: none;
    margin-top: 1rem;
    padding: 1.25rem;
    background: var(--color-bg-subtle);
    border-radius: 12px;
    animation: fadeIn 0.2s ease-out;
}

.help-content.show {
    display: block;
}

.term {
    margin-bottom: 1rem;
}

.term:last-child {
    margin-bottom: 0;
}

.term strong {
    font-size: 0.9375rem;
    color: var(--color-text-primary);
}

.term p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

/* ========================================
   Main Form
   ======================================== */
.calc-main {
    flex: 1;
}

.calc-form {
    position: relative;
}

/* Steps */
.calc-step {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.calc-step.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.step-indicator {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.step-question {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.step-hint {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

/* Input Group */
.input-group {
    position: relative;
    margin-bottom: 2rem;
}

.input-group input[type="number"] {
    width: 100%;
    padding: 1rem 4rem 1rem 1.25rem;
    font-size: 1.25rem;
    font-family: inherit;
    border: 2px solid #e5e5e5;
    border-radius: 12px;
    background: var(--color-bg);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-group input[type="number"]:focus {
    outline: none;
    border-color: var(--color-button-bg);
    box-shadow: 0 0 0 4px rgba(22, 15, 12, 0.1);
}

.input-group input[type="number"]::placeholder {
    color: #c4c4c4;
}

.input-suffix {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* Remove number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

/* Option Cards */
.option-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.option-card {
    display: flex;
    align-items: flex-start;
    padding: 1.25rem;
    background: var(--color-bg-subtle);
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-card:hover {
    background: #f0f0f0;
}

.option-card input[type="radio"] {
    margin-top: 0.25rem;
    margin-right: 1rem;
    width: 20px;
    height: 20px;
    accent-color: var(--color-button-bg);
}

.option-card:has(input:checked) {
    border-color: var(--color-button-bg);
    background: var(--color-bg);
}

.option-content {
    display: flex;
    flex-direction: column;
}

.option-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.option-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

/* Buttons */
.btn-group {
    display: flex;
    gap: 1rem;
}

.btn-next,
.btn-back,
.btn-restart {
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-next {
    background: var(--color-button-bg);
    color: var(--color-button-text);
    flex: 1;
}

.btn-next:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.btn-back {
    background: transparent;
    color: var(--color-text-secondary);
    border: 2px solid #e5e5e5;
}

.btn-back:hover {
    border-color: var(--color-text-secondary);
    color: var(--color-text-primary);
}

/* Additional Questions */
.additional-questions {
    margin-bottom: 2rem;
}

.question-block {
    margin-bottom: 1.5rem;
}

.question-block label {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

/* RNOR Questions */
.rnor-question {
    margin-bottom: 1.5rem;
}

.rnor-label {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

/* ========================================
   Result
   ======================================== */
.result-container {
    animation: fadeIn 0.4s ease-out;
}

.result-container.hidden {
    display: none;
}

.result-card {
    background: var(--color-bg-subtle);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
}

.result-status {
    margin-bottom: 1.5rem;
}

.status-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 999px;
}

.status-badge.nri {
    background: #dbeafe;
    color: #1e40af;
}

.status-badge.ror {
    background: #dcfce7;
    color: #166534;
}

.status-badge.rnor {
    background: #fef3c7;
    color: #92400e;
}

.result-title {
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.result-description {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    max-width: 480px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.result-details {
    text-align: left;
    background: var(--color-bg);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.result-details h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.result-details ul {
    list-style: none;
}

.result-details li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.result-details li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-text-primary);
}

.btn-restart {
    background: var(--color-button-bg);
    color: var(--color-button-text);
}

.btn-restart:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* ========================================
   Footer
   ======================================== */
.calc-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e5e5;
}

.disclaimer {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-align: center;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 640px) {
    .calculator-container {
        padding: 1.5rem;
    }

    .calc-title {
        font-size: 2rem;
    }

    .step-question {
        font-size: 1.25rem;
    }

    .result-card {
        padding: 1.5rem;
    }

    .btn-group {
        flex-direction: column-reverse;
    }

    .btn-back {
        text-align: center;
    }
}