:root {
    --navy: #1a2744;
    --navy-mid: #2c3e6b;
    --accent: #b5460f;
    --accent-light: #e8601e;
    --gold: #c8921a;
    --gold-light: #f5c842;
    --green: #1a6b3a;
    --green-light: #e8f5ee;
    --green-border: #7bbf98;
    --red: #b5200f;
    --red-light: #fdf0ee;
    --red-border: #e8a09a;
    --text-primary: #0f1826;
    --text-secondary: #4a5568;
    --text-muted: #8a9ab0;
    --border: #dde3ec;
    --bg: #ffffff;
    --bg-page: #f4f6fb;
    --bg-input: #f9fafc;
    --shadow-sm: 0 1px 3px rgba(26,39,68,0.08), 0 1px 2px rgba(26,39,68,0.04);
    --shadow-md: 0 4px 16px rgba(26,39,68,0.10), 0 2px 6px rgba(26,39,68,0.06);
    --shadow-lg: 0 12px 40px rgba(26,39,68,0.14), 0 4px 12px rgba(26,39,68,0.08);
}

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

.nda-calculator {
    background: var(--bg-page);
    color: var(--text-primary);
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px 60px;
    background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(44,62,107,0.08) 0%, transparent 70%);
}

.nda-calculator .container {
    width: 100%;
    max-width: 700px;
    animation: fadeUp 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Header */
.nda-calculator .header {
    text-align: center;
    margin-bottom: 40px;
}

.nda-calculator .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--navy);
    color: #fff;
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 18px;
}

.nda-calculator h1 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: clamp(2.1rem, 5vw, 3rem);
    font-weight: 400;
    color: var(--navy);
    line-height: 1.15;
    margin: 0;
}

.nda-calculator h1 em {
    font-style: italic;
    color: var(--accent);
}

.nda-calculator .subtitle {
    color: var(--text-secondary);
    font-size: 15px;
    margin-top: 10px;
    font-weight: 400;
}

/* Cards */
.nda-calculator .card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
}

.nda-calculator .card:hover {
    box-shadow: var(--shadow-lg);
}

.nda-calculator .card-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2.5px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 28px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nda-calculator .card-title::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 14px;
    background: var(--accent);
    border-radius: 2px;
}

/* Form */
.nda-calculator .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 500px) {
    .nda-calculator .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

.nda-calculator .form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.nda-calculator .form-group:last-child {
    margin-bottom: 0;
}

.nda-calculator label {
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.nda-calculator .required {
    color: var(--accent);
    font-size: 12px;
}

.nda-calculator small {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: -4px;
}

.nda-calculator select,
.nda-calculator input[type="date"],
.nda-calculator input[type="tel"],
.nda-calculator input[type="text"] {
    background: var(--bg-input);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
    font-size: 15px;
    padding: 12px 14px;
    outline: none;
    transition: border-color 0.18s, box-shadow 0.18s;
    width: 100%;
}

.nda-calculator select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234a5568' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    appearance: none;
}

.nda-calculator select:focus,
.nda-calculator input:focus {
    border-color: var(--navy-mid);
    box-shadow: 0 0 0 3px rgba(44, 62, 107, 0.10);
    background: #fff;
}

/* Radio Buttons */
.nda-calculator .radio-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.nda-calculator .radio-btn {
    flex: 1;
    min-width: 80px;
    text-align: center;
    padding: 11px 10px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-input);
    transition: all 0.18s;
    user-select: none;
}

.nda-calculator .radio-btn:hover {
    border-color: var(--navy-mid);
    color: var(--navy);
    background: #fff;
    transform: translateY(-1px);
}

.nda-calculator .radio-btn.active {
    border-color: var(--navy);
    background: var(--navy);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(26, 39, 68, 0.18);
}

/* Calculate Button */
.nda-calculator .calculate-btn {
    width: 100%;
    padding: 15px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-family: 'DM Sans', sans-serif;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 10px;
    box-shadow: 0 4px 14px rgba(181, 70, 15, 0.30);
}

.nda-calculator .calculate-btn:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(181, 70, 15, 0.35);
}

.nda-calculator .calculate-btn:active {
    transform: translateY(0);
}

/* Result Card */
.nda-calculator .result-card {
    display: none;
}

.nda-calculator .result-card.visible {
    display: block;
    animation: fadeUp 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Info Rows */
.nda-calculator .info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 11px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.nda-calculator .info-row:last-child {
    border-bottom: none;
}

.nda-calculator .info-row .key {
    color: var(--text-secondary);
    font-weight: 400;
}

.nda-calculator .info-row .val {
    font-weight: 600;
    color: var(--text-primary);
}

.nda-calculator .info-row .val.green {
    color: var(--green);
}

.nda-calculator .info-row .val.red {
    color: var(--red);
}

.nda-calculator .info-row .val.gold {
    color: var(--gold);
}

/* Attempts Grid */
.nda-calculator .attempts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(148px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}

.nda-calculator .attempt-item {
    background: var(--green-light);
    border: 1.5px solid var(--green-border);
    border-radius: 14px;
    padding: 18px 14px;
    text-align: center;
    transition: transform 0.18s, box-shadow 0.18s;
}

.nda-calculator .attempt-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(26, 107, 58, 0.15);
}

.nda-calculator .attempt-nda {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--green);
    margin-bottom: 4px;
}

.nda-calculator .attempt-year {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: 26px;
    font-weight: 400;
    color: var(--navy);
    line-height: 1;
    margin-bottom: 10px;
}

.nda-calculator .attempt-pill {
    display: inline-block;
    font-size: 11px;
    font-weight: 500;
    padding: 3px 9px;
    border-radius: 100px;
    margin-top: 4px;
    line-height: 1.6;
}

.nda-calculator .pill-exam {
    background: rgba(26, 39, 68, 0.08);
    color: var(--navy);
}

.nda-calculator .pill-join {
    background: rgba(200, 146, 26, 0.12);
    color: #7a5800;
}

.nda-calculator .pill-age {
    background: rgba(181, 70, 15, 0.10);
    color: var(--accent);
    font-weight: 600;
}

/* No Attempts */
.nda-calculator .no-attempts {
    background: var(--red-light);
    border: 1.5px solid var(--red-border);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    color: var(--red);
    font-weight: 500;
    font-size: 14px;
    line-height: 1.6;
}

/* Note Box */
.nda-calculator .note-box {
    background: #fffbf0;
    border: 1px solid #f0d98a;
    border-left: 4px solid var(--gold);
    padding: 16px 18px;
    border-radius: 10px;
    font-size: 13.5px;
    color: #5a4a00;
    line-height: 1.7;
    margin-top: 18px;
}

/* Section Label */
.nda-calculator .section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nda-calculator .section-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* Divider */
.nda-calculator .divider {
    height: 1px;
    background: var(--border);
    margin: 22px 0;
}

/* Loading State */
.nda-calculator .loading {
    position: relative;
    opacity: 0.6;
    pointer-events: none;
}

.nda-calculator .loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Error Message */
.nda-calculator .error-message {
    background: var(--red-light);
    border: 1px solid var(--red-border);
    border-radius: 12px;
    padding: 12px 16px;
    margin-top: 15px;
    color: var(--red);
    font-size: 13px;
    text-align: center;
}

/* Success Animation */
@keyframes successPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.nda-calculator .save-success {
    animation: successPulse 0.5s ease;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .nda-calculator .card {
        padding: 24px;
    }
    
    .nda-calculator .attempts-grid {
        grid-template-columns: 1fr;
    }
    
    .nda-calculator .radio-group {
        flex-direction: column;
    }
    
    .nda-calculator .radio-btn {
        width: 100%;
    }
}

/* Print Styles */
@media print {
    .nda-calculator {
        background: white;
        padding: 20px;
    }
    
    .nda-calculator .calculate-btn {
        display: none;
    }
    
    .nda-calculator .result-card {
        display: block !important;
    }
}

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:wght@300;400;500;600;700&display=swap');