body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--forest-green);
    line-height: 1.6;
    margin: 0;

    /* FULL SCREEN BACKGROUND IMAGE SETTINGS */
    background-image: 
        /* 1. The Overlay: This adds a white/green tint so text is easy to read */
        linear-gradient(rgba(245, 247, 245, 0.85), rgba(245, 247, 245, 0.85)),
        
        /* 2. Your Local Image */
        url('Screenshot 2025-12-11 181158.png'); 

    background-size: cover;       /* Covers the whole screen */
    background-position: center;  /* Centers the image */
    background-attachment: fixed; /* Keeps the image still while you scroll */
    background-repeat: no-repeat;
}


/* =======================================================
   CLEANAIR AQI - PROFESSIONAL DARK GREEN THEME
   ======================================================= */

/* --- 1. COLOR PALETTE (CSS Variables) --- */
:root {
    /* Primary Dark Greens */
    --forest-green: #003313;   /* Headers, Nav Background */
    --pine-green:   #083d1c;   /* Buttons, Active Links */
    --hunter-green: #355e3b;   /* Hover States, Secondary Text */
    
    /* Accents & Borders */
    --moss-green:   #4f7942;   /* Borders, Icons */
    --sage-green:   #8fbc8f;   /* Subtle Accents */
    --mint-soft:    #e8f5e9;   /* Very light green background */

    /* Neutrals */
    --white:        #ffffff;   /* Card Backgrounds, Text on Green */
    --off-white:    #f5f7f5;   /* Main Page Background */
    --cream:        #fffdd0;   /* Highlight Sections */
    --gray-green:   #a9b8a9;   /* Subtle Borders */
    
    /* Shadows */
    --shadow:       0 4px 12px rgba(8, 61, 28, 0.15);
}

/* --- 2. GLOBAL RESET & TYPOGRAPHY --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--off-white);
    color: var(--forest-green);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* --- 3. HEADER & NAVIGATION --- */
header {
    background-color: var(--forest-green);
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--white);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links li a {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-links li a:hover,
.nav-links li a.active {
    background-color: var(--pine-green);
    color: var(--white);
    border-bottom: 2px solid var(--sage-green);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.8rem;
    cursor: pointer;
}

/* --- 4. LAYOUT & SECTIONS --- */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 80vh;
}

.hero-section {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--mint-soft);
    border-bottom: 1px solid var(--sage-green);
    border-radius: 8px;
    margin-bottom: 30px;
}

.hero-section h1 {
    font-size: 2.5rem;
    color: var(--pine-green);
}

.card-section {
    margin-bottom: 40px;
}

.card-section h2 {
    border-left: 5px solid var(--hunter-green);
    padding-left: 15px;
    margin-bottom: 20px;
    color: var(--forest-green);
}

/* --- 5. CARDS & CONTAINERS --- */
.card-layout, .graphs-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

/* General Card Style */
.data-card, .card, .aqi-card, .steps-card, .critical-info, .pollutant-card {
    background: var(--white);
    border: 1px solid var(--gray-green);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.data-card:hover, .pollutant-card:hover {
    transform: translateY(-3px);
}

/* Special Case: Hidden elements */
.hidden {
    display: none;
}

/* --- 6. FORMS & INPUTS --- */
.search-container {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
}

input[type="text"], select {
    padding: 12px;
    border: 1px solid var(--moss-green);
    border-radius: 6px;
    font-size: 1rem;
    outline: none;
    min-width: 200px;
}

input[type="text"]:focus, select:focus {
    border-color: var(--forest-green);
    box-shadow: 0 0 0 3px rgba(79, 121, 66, 0.2);
}

/* Buttons */
button {
    background-color: var(--pine-green);
    color: var(--white);
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: var(--hunter-green);
}

/* --- 7. SPECIFIC PAGE STYLES --- */

/* Air Pollution Page Cards */
#real-time-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.pollutant-card h3 {
    text-align: center;
    color: var(--pine-green);
    border-bottom: 2px solid var(--sage-green);
    padding-bottom: 5px;
    margin-bottom: 15px;
}

.level {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--forest-green);
}

/* Symptom Checker (Asthma Page) */
.form-layout {
    flex-direction: column;
    align-items: flex-start;
    max-width: 600px;
    margin: 0 auto;
}

.form-layout label {
    margin-bottom: 12px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.question {
    background-color: var(--mint-soft);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid var(--moss-green);
}

.question label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
}

/* Result Box Styling */
#result {
    margin-top: 20px;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.1);
}

/* Solutions Page */
.plant-list {
    list-style: none;
}

.plant-list li {
    background: var(--white);
    margin-bottom: 10px;
    padding: 15px;
    border-left: 5px solid var(--sage-green);
    box-shadow: 2px 2px 5px rgba(0,0,0,0.05);
}

blockquote.critical-info {
    border-left: 5px solid #d32f2f; /* Red for emergency */
    background-color: #ffebee;
}

/* --- 8. MOBILE RESPONSIVENESS --- */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: var(--pine-green);
        position: absolute;
        top: 60px;
        left: 0;
        padding: 20px;
    }

    .nav-links.active {
        display: flex;
    }

    .search-container {
        flex-direction: column;
    }

    input[type="text"], select, button {
        width: 100%;
    }
}
/* ==============================================
   Personal Symptom Tracker (AQI vs. Severity)
   ============================================== */

/* The main container for the tracker */
.aqi-graph {
    background-color: var(--white);       /* Clean white background */
    border: 1px solid var(--gray-green);  /* Subtle green border */
    border-radius: 12px;                  /* Rounded corners */
    padding: 30px;                        /* Spacing inside the card */
    box-shadow: var(--shadow);            /* Soft shadow for depth */
    margin: 40px auto;                    /* Spacing outside */
    max-width: 900px;                     /* Prevent it from getting too wide */
    text-align: center;                   /* Center the title */
}

/* The Heading */
.aqi-graph h2 {
    color: var(--pine-green);             /* Dark Pine Green text */
    font-size: 1.8rem;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

/* Adds a small decorative underline to the title */
.aqi-graph h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--sage-green);  /* Light Sage accent */
    margin: 8px auto 0;
    border-radius: 2px;
}

/* The Chart Canvas */
#aqiChart {
    background-color: var(--mint-soft);   /* Very light mint background behind chart */
    border: 1px dashed var(--moss-green); /* Dashed border for technical look */
    border-radius: 8px;
    padding: 15px;                        /* Spacing between border and lines */
    
    /* Responsive sizing */
    width: 100% !important;
    height: auto !important;
    max-height: 450px;                    /* Restrict height on large screens */
}

/* Mobile adjustments */
@media (max-width: 600px) {
    .aqi-graph {
        padding: 15px;
    }
    
    .aqi-graph h2 {
        font-size: 1.4rem;
    }
}
/* ==============================================
   RADAR CHART SIZING
   ============================================== */

#radar-box {
    max-width: 500px;    /* Limits the width so it's not huge */
    width: 90%;          /* Ensures it fits on mobile screens */
    margin: 40px auto;   /* Centers the box horizontally (Top/Bottom 40px, Left/Right Auto) */
    display: block;      /* Ensures it behaves like a block for centering */
}

/* Optional: Ensure the canvas inside doesn't overflow */
#radarChart {
    max-height: 500px;
}
/* The Modal (background) */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1000; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content/Box */
.modal-content {
    background-color: #fefefe;
    margin: 5% auto; /* 5% from the top and centered */
    padding: 20px;
    border: 1px solid #888;
    width: 80%; /* Could be more or less, depending on screen size */
    max-width: 900px; /* Max size for desktop view */
    position: relative;
    border-radius: 8px;
}
.result-box {
    margin-top: 20px;
    padding: 20px;
    border-radius: 8px;
    border-left: 5px solid;
    animation: fadeIn 0.5s ease-in;
}
.form-layout label {
    display: block;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
}

.form-layout label:has(input:checked) {
    background-color: #e3f2fd;
    border-color: #2196f3;
    font-weight: bold;
}

.hidden {
    display: none;
}