:root {
    --bg-color: #f4f7f9;
    --text-color: #333333;
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --do-color: #10b981;
    --dont-color: #ef4444;
    --do-bg: #f0fdf4;
    --dont-bg: #fef2f2;
}

body.dark-mode {
    --bg-color: #1a202c;
    --text-color: #e2e8f0;
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --card-bg: #2d3748;
    --border-color: #4a5568;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --do-bg: #1a362b;
    --dont-bg: #451a1a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

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

.main-header h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
}
.theme-switch {
    display: inline-block;
    height: 26px;
    position: relative;
    width: 50px;
}
.theme-switch input {
    display: none;
}
.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
    border-radius: 26px;
}
.slider:before {
    background-color: #fff;
    bottom: 3px;
    content: "";
    height: 20px;
    left: 3px;
    position: absolute;
    transition: .4s;
    width: 20px;
    border-radius: 50%;
}
input:checked + .slider {
    background-color: var(--primary-color);
}
input:checked + .slider:before {
    transform: translateX(24px);
}

#hero {
    padding: 5rem 0;
    text-align: center;
}

#hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

#hero p {
    font-size: 1.1rem;
    color: var(--text-color);
    opacity: 0.8;
    margin-bottom: 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    text-align: left;
}

.stat-card, .tip-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px var(--shadow-color);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.stat-card:hover, .tip-card:hover {
    transform: translateY(-5px);
}

.stat-card h3, .tip-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tip-card ul {
    list-style: none;
}
.tip-card li {
    margin-bottom: 0.75rem;
}
.tip-card li::before {
    content: '✓';
    color: var(--do-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

#dos-donts {
    padding: 4rem 0;
}

#dos-donts h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 3rem;
}

.dos-donts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.dos-column, .donts-column {
    padding: 2rem;
    border-radius: 12px;
}

.dos-column {
    background-color: var(--do-bg);
    border: 1px solid var(--do-color);
}

.donts-column {
    background-color: var(--dont-bg);
    border: 1px solid var(--dont-color);
}

.dos-column h3 { color: var(--do-color); }
.donts-column h3 { color: var(--dont-color); }

.dos-column h3, .donts-column h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid;
    padding-bottom: 0.5rem;
}

.dos-column ul, .donts-column ul {
    list-style: none;
}

.dos-column li, .donts-column li {
    font-size: 1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
}

.dos-column li::before, .donts-column li::before {
    font-weight: bold;
    font-size: 1.5rem;
    margin-right: 0.75rem;
    line-height: 1.2;
}

.dos-column li::before { content: '✔'; color: var(--do-color); }
.donts-column li::before { content: '✖'; color: var(--dont-color); }


#report {
    padding: 4rem 0;
    background-color: var(--card-bg);
}

#report h2 {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

#report p {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem auto;
    opacity: 0.8;
}

.report-form {
    max-width: 700px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.report-form label {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.report-form input,
.report-form select,
.report-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.report-form input:focus,
.report-form select:focus,
.report-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.report-form textarea {
    min-height: 150px;
    resize: vertical;
}

.submit-btn {
    padding: 1rem;
    border: none;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.submit-btn:hover {
    background-color: var(--primary-hover);
}

footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .main-header h1 {
        font-size: 1.4rem;
    }
    #hero h2 {
        font-size: 2rem;
    }
    .dos-donts-grid {
        grid-template-columns: 1fr;
    }
}