/*
 * ReaLearn Terms & Conditions Stylesheet
 * Implementing Brand Guidelines from brand.md
 */

/* ==================== ROOT VARIABLES ==================== */
:root {
    /* Brand Colors - from brand.md */
    --primary-color: #0A2540;        /* Deep Blue - The Expert */
    --accent-color: #00C49A;         /* Vibrant Teal - The Progressive */
    --background-color: #FFFFFF;     /* Clean White */
    --secondary-bg: #F4F7F6;         /* Light Gray */
    --text-color: #222222;           /* Dark Text */
    --text-color-light: #4A5568;     /* For subtle text */

    /* Typography */
    --font-primary: 'Inter', Arial, sans-serif;

    /* Font Weights */
    --weight-regular: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;
    --weight-extrabold: 800;

    /* Line Heights (Science of Learning - 1.5x) */
    --line-height-body: 1.6;
}

/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: var(--line-height-body);
    color: var(--text-color);
    background-color: var(--secondary-bg);
    margin: 0;
}

/* ==================== CONTAINER ==================== */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
    background-color: var(--background-color);
}

/* ==================== TYPOGRAPHY ==================== */
h1 {
    font-family: var(--font-primary);
    font-size: 2.25rem;  /* 36px */
    font-weight: var(--weight-extrabold);
    color: var(--primary-color);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h2 {
    font-family: var(--font-primary);
    font-size: 1.75rem;  /* 28px */
    font-weight: var(--weight-bold);
    color: var(--primary-color);
    line-height: 1.3;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

h3 {
    font-family: var(--font-primary);
    font-size: 1.25rem;  /* 20px */
    font-weight: var(--weight-semibold);
    color: var(--primary-color);
    line-height: 1.3;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
    max-width: 75ch; /* Optimal line length for readability - brand guideline */
}

.last-updated {
    font-size: 0.875rem;
    color: var(--text-color-light);
    margin-bottom: 2rem;
}

strong {
    font-weight: var(--weight-bold);
    color: var(--primary-color);
}

/* ==================== LINKS ==================== */
a {
    color: var(--accent-color);
    text-decoration: underline;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-color);
}

/* ==================== LISTS ==================== */
ul, ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
    line-height: var(--line-height-body);
}

ul {
    list-style-type: disc;
}

ul ul {
    list-style-type: circle;
    margin-top: 0.5rem;
}

ol {
    list-style-type: decimal;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 768px) {
    .container {
        padding: 2rem 1.5rem;
    }

    h1 {
        font-size: 1.75rem;  /* 28px */
    }

    h2 {
        font-size: 1.5rem;  /* 24px */
    }

    h3 {
        font-size: 1.125rem;  /* 18px */
    }

    body {
        font-size: 15px;
    }
}

/* ==================== PRINT STYLES ==================== */
@media print {
    body {
        background-color: var(--background-color);
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    a {
        color: var(--text-color);
    }

    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }
}