/* ===== LUCID POINT - ACADEMIC STYLE ===== */
:root {
    --navy: #2C3E50;
    --white: #FFFFFF;
    --light-gray: #ECF0F1;
    --accent-blue: #3498DB;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== NAVIGATION ===== */
.navbar {
    background: var(--navy);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--white);
    text-decoration: none;
}

.logo span {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--navy), #1a2634);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

/* ===== LEVEL CARDS ===== */
.level-section {
    padding: 4rem 0;
}

.level-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--navy);
    font-size: 2rem;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.level-card {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    border-top: 4px solid transparent;
}

.level-card:hover {
    transform: translateY(-5px);
}

.level-card.beginner {
    border-top-color: #27AE60;
}

.level-card.intermediate {
    border-top-color: #F39C12;
}

.level-card.advanced {
    border-top-color: #E74C3C;
}

.level-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.level-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.level-card .btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--accent-blue);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background 0.3s;
}

.level-card .btn:hover {
    background: var(--navy);
}

/* ===== SUBJECT CARDS ===== */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.subject-card {
    background: var(--light-gray);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s;
}

.subject-card:hover {
    transform: translateY(-5px);
}

.subject-card h3 {
    color: var(--navy);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.subject-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.subject-card .btn-subject {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background: var(--accent-blue);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-size: 0.9rem;
}

/* ===== CRITICAL THINKING CORNER ===== */
.thinking-corner {
    background: var(--light-gray);
    padding: 3rem;
    border-radius: 8px;
    margin: 3rem 0;
}

.thinking-corner h2 {
    color: var(--navy);
    margin-bottom: 1.5rem;
}

.observation-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    border-left: 4px solid var(--accent-blue);
}

.observation-question {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.observation-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--navy);
    color: var(--white);
    padding: 3rem 0;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--accent-blue);
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    display: block;
    margin: 0.5rem 0;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.footer-section a:hover {
    opacity: 1;
}

.copyright {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.6;
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }