/* Every Reader - Main Stylesheet */
/* Warm, parent-friendly design */

/* ===== CSS VARIABLES ===== */
:root {
    /* Color Palette - Warm and Welcoming */
    --primary-color: #E67E22;        /* Warm orange */
    --primary-dark: #D35400;         /* Darker orange for hover */
    --secondary-color: #3498DB;      /* Friendly blue */
    --secondary-dark: #2980B9;       /* Darker blue */
    --accent-color: #27AE60;         /* Success green */
    --text-dark: #2C3E50;            /* Dark blue-gray for text */
    --text-medium: #555;             /* Medium gray */
    --text-light: #7F8C8D;           /* Light gray */
    --background: #FFFFFF;           /* White */
    --background-light: #F9F9F9;     /* Very light gray */
    --background-warm: #FFF8F0;      /* Warm off-white */
    --border-color: #E0E0E0;         /* Light border */

    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: Georgia, "Times New Roman", serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--background);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-dark);
    text-decoration: underline;
}

strong {
    font-weight: 600;
    color: var(--text-dark);
}

/* ===== LAYOUT ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-xxl) 0;
}

.section-light {
    background-color: var(--background-light);
}

.section-warm {
    background-color: var(--background-warm);
}

/* ===== HEADER ===== */
header {
    background-color: var(--background);
    border-bottom: 2px solid var(--primary-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    text-decoration: none;
}

.logo-link:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

.logo-image {
    height: 50px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: bold;
    line-height: 1.2;
}

.tagline {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    line-height: 1.2;
}

/* ===== NAVIGATION ===== */
nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

nav a {
    color: var(--text-dark);
    font-weight: 500;
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background-color 0.3s ease, color 0.3s ease;
}

nav a:hover {
    background-color: var(--background-warm);
    color: var(--primary-color);
    text-decoration: none;
}

nav a.active {
    background-color: var(--primary-color);
    color: white;
}

/* ===== HAMBURGER MENU ===== */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.hamburger-menu span {
    width: 2rem;
    height: 0.25rem;
    background: var(--primary-color);
    border-radius: 10px;
    transition: all 0.3s ease;
    position: relative;
    transform-origin: 1px;
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--background-warm) 0%, var(--background-light) 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.hero h1 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 3rem;
}

.hero .subtitle {
    font-size: 1.5rem;
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.hero .description {
    font-size: 1.125rem;
    color: var(--text-medium);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1.125rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--spacing-xl) 0;
}

/* ===== CARDS ===== */
.card {
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}

.card h3 {
    color: var(--primary-color);
    margin-top: 0;
}

/* ===== GRID LAYOUTS ===== */
.grid {
    display: grid;
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===== CONTENT SECTIONS ===== */
.content-section {
    margin: var(--spacing-xl) 0;
}

.content-section h2 {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.content-section h3 {
    color: var(--secondary-color);
}

/* ===== HIGHLIGHT BOXES ===== */
.highlight-box {
    background-color: var(--background-warm);
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius);
}

.info-box {
    background-color: #E8F4F8;
    border-left: 4px solid var(--secondary-color);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius);
}

.success-box {
    background-color: #E8F8F0;
    border-left: 4px solid var(--accent-color);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--border-radius);
}

/* ===== LISTS ===== */
ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

li {
    margin-bottom: var(--spacing-xs);
}

.checkmark-list {
    list-style: none;
    margin-left: 0;
}

.checkmark-list li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.checkmark-list li:before {
    content: "✓";
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* ===== FOOTER ===== */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
    margin-left: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: white;
    text-decoration: none;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.2);
    color: var(--text-light);
}

/* ===== BOOK CARDS (for library) ===== */
.book-card {
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.book-card:hover {
    box-shadow: 0 6px 16px rgba(0,0,0,0.15);
    transform: translateY(-4px);
}

.book-cover {
    /*width: 100%;*/
    /*height: 200px;*/
    /*object-fit: cover;*/
    /*border-radius: var(--border-radius);*/
    /*margin-bottom: var(--spacing-md);*/
    /*background-color: var(--background-light);*/
}

.book-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.book-levels {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--spacing-sm) 0;
}

.level-badge {
    background-color: var(--secondary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== TABLES ===== */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
}

th, td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--background-light);
    font-weight: 600;
    color: var(--text-dark);
}

tr:hover {
    background-color: var(--background-warm);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

input[type="text"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .header-content {
        flex-direction: row;
        text-align: left;
        justify-content: space-between;
        align-items: center;
    }

    .logo {
        flex: 1;
    }

    .logo-image {
        height: 40px;
    }

    .logo-name {
        font-size: 1.25rem;
    }

    .tagline {
        font-size: 0.75rem;
    }

    /* Show hamburger on mobile */
    .hamburger-menu {
        display: flex;
        order: 3;
    }

    /* Hide navigation by default on mobile */
    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--background);
        border-bottom: 2px solid var(--primary-color);
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    /* Show navigation when active */
    .main-nav.active {
        max-height: 500px;
    }

    nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-sm) 0;
    }

    nav li {
        width: 100%;
    }

    nav a {
        display: block;
        padding: var(--spacing-md) var(--spacing-lg);
        border-radius: 0;
        border-bottom: 1px solid var(--border-color);
    }

    nav a:hover {
        background-color: var(--background-warm);
    }

    nav a.active {
        border-left: 4px solid var(--primary-color);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .subtitle {
        font-size: 1.25rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--primary-color);
}

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

.text-muted {
    color: var(--text-light);
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }