/* Base Reset & Variables */
:root {
    --primary-hue: 150;
    /* Green */
    --primary: hsl(var(--primary-hue), 90%, 35%);
    /* Slightly darker for contrast on white */
    --primary-dark: hsl(var(--primary-hue), 90%, 25%);
    --accent: hsl(200, 90%, 45%);
    --bg-dark: hsl(0, 0%, 100%);
    /* White */
    --text-light: hsl(220, 30%, 15%);
    /* Dark Text */
    --text-dim: hsl(220, 10%, 40%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    /* Milky White Glass */
    --glass-border: rgba(0, 0, 0, 0.1);
    --radius-lg: 24px;
    --radius-md: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Animated Background */
.background-globes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.globe {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.globe-1 {
    top: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--primary), transparent);
}

.globe-2 {
    bottom: -10%;
    left: -10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, var(--accent), transparent);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    50% {
        transform: translate(30px, 50px) scale(1.1);
    }
}

/* Layout */
.container {
    max-width: 1600px;
    /* Much wider cap */
    width: 95%;
    /* Take up 95% of the available iframe/screen width */
    margin: 0 auto;
    padding: 0 10px;
    /* Reduced side padding for more space */
}

/* Responsive Grid for Large Screens */
@media (min-width: 900px) {
    .panel.active {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    /* Make headers/full-width items span both columns */
    .panel h3,
    .panel .full-width {
        grid-column: 1 / -1;
    }
}

/* Header */
.main-header {
    padding: 20px 0;
    margin-bottom: 40px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-shadow: 0 0 20px rgba(0, 255, 127, 0.3);
}

/* Glass Panel Utility */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    /* Softer shadow */
    margin-bottom: 60px;
}

/* Calculator Section */
.calculator-card {
    transition: var(--transition);
}

.calc-header {
    text-align: center;
    margin-bottom: 30px;
}

.calc-header h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-dim);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: rgba(0, 0, 0, 0.05);
    /* Light gray track */
    padding: 5px;
    border-radius: var(--radius-md);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-dim);
    padding: 12px;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.tab-btn:hover {
    color: var(--text-light);
    background: rgba(0, 0, 0, 0.05);
}

.tab-btn.active {
    background: #fff;
    /* White active tab */
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Form Panels */
.panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.panel.active {
    display: block;
}

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

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

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 14px;
    background: #fff;
    /* White inputs */
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-light);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 220, 130, 0.1);
    background: #fff;
}

.form-actions {
    margin-top: 30px;
}

.btn-primary {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--radius-md);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(0, 220, 130, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 220, 130, 0.4);
}

/* Results */
.results-section {
    margin-top: 40px;
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
}

.results-section.hidden {
    display: none;
}

.score-display {
    margin: 20px 0;
}

.score {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--primary);
}

.unit {
    font-size: 1rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.comparison {
    margin-bottom: 20px;
    color: var(--text-light);
    font-size: 1.1rem;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Content Guide Styling */
.content-guide {
    position: relative;
    z-index: 10;
}

.content-guide h1 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.content-guide h2 {
    font-size: 1.5rem;
    margin: 40px 0 20px;
    color: var(--text-light);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--glass-border);
}

.content-guide h3 {
    font-size: 1.2rem;
    margin: 30px 0 15px;
    color: var(--text-light);
}

.content-guide p {
    margin-bottom: 20px;
    color: var(--text-dim);
    font-size: 1.05rem;
}

.content-guide ul,
.content-guide ol {
    margin-bottom: 20px;
    padding-left: 25px;
}

.content-guide li {
    margin-bottom: 10px;
    color: var(--text-dim);
}

.content-guide strong {
    color: var(--text-light);
}

.lead {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 40px;
}

/* Responsiveness */
@media (max-width: 768px) {
    .glass-panel {
        padding: 30px 20px;
    }

    .calc-header h1 {
        font-size: 2rem;
    }

    .score {
        font-size: 3rem;
    }
}

/* FAQ Section */
.faq-section {
    margin: 60px 0;
}

.faq-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--primary);
}

.faq-item {
    margin-bottom: 15px;
    border-bottom: 1px solid var(--glass-border);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item summary {
    padding: 20px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-light);
    list-style: none;
    /* Remove default triangle */
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary:hover {
    color: var(--primary);
    background: rgba(0, 0, 0, 0.02);
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item[open] summary {
    color: var(--primary);
    border-bottom: 1px solid var(--glass-border);
}

.faq-content {
    padding: 20px;
    color: var(--text-dim);
    line-height: 1.6;
    animation: slideDown 0.3s ease-out;
}

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

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

/* Enhanced Footer */
.main-footer {
    padding: 60px 40px 20px;
    margin-bottom: 40px;
    margin-top: 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--glass-border);
}

.footer-brand h3 {
    color: var(--primary);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.footer-links h4,
.footer-legal h4 {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links ul,
.footer-legal ul {
    list-style: none;
}

.footer-links li,
.footer-legal li {
    margin-bottom: 12px;
}

.footer-links a,
.footer-legal a {
    color: var(--text-dim);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover,
.footer-legal a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.9rem;
}
/* ── Guide Banner ── */
.guide-banner {
    margin: 28px 0 8px;
    background: linear-gradient(135deg, rgba(16,185,129,0.12), rgba(5,150,105,0.18));
    border: 1px solid rgba(16,185,129,0.35);
    border-radius: 12px;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.guide-banner-text {
    display: flex;
    align-items: center;
    gap: 12px;
}
.guide-banner-icon { font-size: 1.8rem; line-height: 1; flex-shrink: 0; }
.guide-banner-copy strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 3px;
}
.guide-banner-copy span { font-size: 0.82rem; opacity: 0.8; }
.guide-banner-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #059669, #10b981);
    color: #fff;
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 8px;
    white-space: nowrap;
    flex-shrink: 0;
    transition: opacity 0.2s;
}
.guide-banner-btn:hover { opacity: 0.88; color: #fff; text-decoration: none; }
@media (max-width: 600px) {
    .guide-banner { flex-direction: column; align-items: flex-start; }
}