:root {
    --bg-dark: #0a0a0a;
    --bg-card: #161616;
    --text-main: #f5f5f5;
    --text-muted: #888888;
    --accent-teal: #6b9e9e;
    --accent-teal-dark: #416161;
    --accent-red: #d96c75;
    --accent-green: #4b9e7b;
    --border-color: #222222;
    --glass-bg: rgba(22, 22, 22, 0.6);
    --glass-border: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background-image: 
        radial-gradient(circle at 10% 0%, rgba(107, 158, 158, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 100%, rgba(107, 158, 158, 0.03) 0%, transparent 40%);
    background-attachment: fixed;
}

.app-container {
    width: 100%;
    max-width: 1100px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* SPA View Management */
.view {
    display: none;
    opacity: 0;
    animation: fadeIn 0.4s ease forwards;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.hidden {
    display: none !important;
}

/* Header / Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    position: relative;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--accent-teal);
    border-radius: 50%;
}

.brand h1 {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.nav-links a:hover, .nav-links a.active-link {
    color: var(--text-main);
}
.nav-links a.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* Helpers */
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.hero-center {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    min-height: 60vh;
    max-width: 700px;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    background-color: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 2rem;
    text-transform: uppercase;
}
.badge .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-teal);
}

/* Typography */
.main-heading {
    font-size: 4rem;
    font-weight: 300;
    line-height: 1.1;
    color: var(--text-main);
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.hero-description {
    color: var(--text-muted);
    font-size: 1.25rem;
    font-weight: 300;
    max-width: 600px;
    margin-bottom: 3rem;
    line-height: 1.6;
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    background-color: #f0f0f0;
    color: #000;
    border: none;
}

.btn-primary:hover {
    background-color: #ffffff;
    transform: translateY(-1px);
}

.btn-link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s ease;
}

.btn-link-arrow:hover {
    color: var(--text-main);
}

.action-row {
    display: flex;
    align-items: center;
    gap: 2rem;
}

/* Bottom Tags */
.footer-tags {
    display: flex;
    gap: 1.5rem;
    margin-top: auto;
    padding-top: 4rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: monospace;
    background: rgba(255,255,255,0.01);
}

/* Home Details Section */
.home-details {
    margin-top: 4rem;
    width: 100%;
    max-width: 800px;
}

.details-heading {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 2rem;
    color: var(--text-main);
}

.readings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.reading-item {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 16px;
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

.reading-item:hover {
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    transform: translateY(-2px);
}

/* Form Styles */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    margin-top: 4rem;
}

.form-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.step-indicator {
    color: var(--accent-teal);
    font-size: 0.85rem;
}

.form-step {
    display: none;
}
.form-step.active {
    display: block;
    animation: fadeIn 0.3s ease forwards;
}

.form-title {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

input[type="number"], select {
    background: rgba(22, 22, 22, 0.8);
    border: 1px solid #333;
    color: var(--text-main);
    padding: 1.2rem 1.25rem;
    border-radius: 16px;
    font-family: inherit;
    font-size: 1.1rem;
    outline: none;
    transition: all 0.2s ease;
    width: 100%;
}

input[type="number"]:focus, select:focus {
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 2px rgba(107, 158, 158, 0.15);
}

/* Hide number spinners for premium look */
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;
}

/* Custom select arrow */
select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1.2rem center;
    background-size: 1em;
}

/* Range Slider */
.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.slider-header label {
    margin-bottom: 0 !important;
}

.slider-value {
    color: var(--text-main);
    font-weight: 500;
    font-size: 1.1rem;
}

input[type="range"].slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    outline: none;
    transition: background 0.2s;
    padding: 0;
    border: none;
}

input[type="range"].slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-teal);
    cursor: pointer;
    border: 2px solid var(--text-main);
    box-shadow: 0 0 10px rgba(107, 158, 158, 0.4);
}

input[type="range"].slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-teal);
    cursor: pointer;
    border: 2px solid var(--text-main);
    box-shadow: 0 0 10px rgba(107, 158, 158, 0.4);
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.radio-card {
    display: flex;
    align-items: center;
    padding: 1.25rem;
    border: 1px solid #333;
    border-radius: 16px;
    cursor: pointer;
    background: rgba(22, 22, 22, 0.8);
    transition: all 0.2s ease;
}

.radio-card:hover {
    border-color: #555;
}

.radio-card:has(input:checked) {
    border-color: var(--accent-teal);
    background: rgba(107, 158, 158, 0.08);
}

.radio-card input[type="radio"] {
    margin-right: 1rem;
    accent-color: var(--accent-teal);
}

.pill-radio-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
}

.pill-radio {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.8rem 1rem;
    border: 1px solid #333;
    border-radius: 30px;
    cursor: pointer;
    background: rgba(22, 22, 22, 0.8);
    transition: all 0.2s ease;
    color: var(--text-muted);
}

.pill-radio input[type="radio"] {
    display: none;
}

.pill-radio:hover {
    border-color: #555;
    color: var(--text-main);
}

.pill-radio:has(input:checked) {
    border-color: var(--accent-teal);
    background: rgba(107, 158, 158, 0.08);
    color: var(--text-main);
}


.form-actions {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-muted);
}

.btn-secondary:hover {
    color: var(--text-main);
}

/* Analyzing Screen */
.spin-animation {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

.progress-container {
    width: 100%;
    max-width: 400px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent-teal);
    transition: width 0.1s linear;
}

/* Cards Section */
.cards-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

/* Cohort Insights specific */
.insights-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2rem;
}

.chart-header {
    margin-bottom: 1.5rem;
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.chart-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.bar-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 250px;
    padding-bottom: 30px;
    position: relative;
    margin-top: 2rem;
    border-bottom: 1px solid var(--border-color);
}

/* Y-axis lines */
.bar-chart::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: var(--border-color);
    opacity: 0.5;
}
.bar-chart::after {
    content: '';
    position: absolute;
    top: 33%; left: 0; right: 0;
    height: 1px;
    background: var(--border-color);
    opacity: 0.5;
}
.y-axis-mid {
    position: absolute;
    top: 66%; left: 0; right: 0;
    height: 1px;
    background: var(--border-color);
    opacity: 0.5;
    z-index: 0;
}

.y-axis-labels {
    position: absolute;
    left: -20px;
    top: 0;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.bar-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 60px;
    height: 100%;
    justify-content: flex-end;
    position: relative;
    z-index: 1;
}

.bar {
    width: 100%;
    background: linear-gradient(to top, var(--accent-teal-dark), var(--accent-teal));
    border-radius: 8px 8px 0 0;
    transition: height 1s ease-out, filter 0.2s ease;
    position: relative;
}

.bar::after {
    content: attr(data-value);
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(30, 30, 30, 0.9);
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity 0.2s ease, top 0.2s ease;
    pointer-events: none;
    white-space: nowrap;
    border: 1px solid var(--border-color);
}

.bar:hover {
    filter: brightness(1.2);
    cursor: pointer;
}

.bar:hover::after {
    opacity: 1;
    top: -40px;
}

.bar-label {
    position: absolute;
    bottom: -25px;
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.chart-footer {
    margin-top: 1.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Results view fixes */
.hero-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 4rem;
    margin-top: 2rem;
}

.score-container {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.score-gauge {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.gauge-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 2.5;
}

.gauge-value {
    fill: none;
    stroke: var(--accent-teal);
    stroke-width: 3.5;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    stroke-linecap: round;
    transition: stroke-dashoffset 2s cubic-bezier(0.1, 0.7, 0.1, 1);
}

.score-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 1;
    text-align: center;
}

.score-number {
    font-size: 5rem;
    font-weight: 300;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.score-label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.score-status {
    color: var(--accent-teal);
    font-size: 0.9rem;
    font-weight: 500;
}

.reading-container {
    flex: 1.5;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.section-subtitle {
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    color: var(--accent-teal);
    font-weight: 500;
}

.highlight {
    color: var(--accent-teal);
}

.highlight-white {
    color: var(--text-main);
    font-weight: 500;
}

.reading-description {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 90%;
}

.action-buttons {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-top: 1rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-category {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.dot-red { background-color: var(--accent-red); }
.dot-teal { background-color: var(--accent-teal); }
.dot-green { background-color: var(--accent-green); }

.card-title-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.icon-box {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.icon-red { color: var(--accent-red); }
.icon-teal { color: var(--text-main); }
.icon-green { color: var(--text-muted); }

.card-title {
    font-size: 1.5rem;
    font-weight: 400;
}

.card-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }
    
    .score-container, .reading-container {
        width: 100%;
        align-items: center;
    }
    
    .reading-description {
        max-width: 100%;
    }
    
    .action-buttons {
        justify-content: center;
    }

    .cards-section {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .pill-radio-group {
        grid-template-columns: 1fr;
    }
    
    .main-heading {
        font-size: 3rem;
    }
}