@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --green: #006633;
    --green-accent: #00a859;
    --light-bg: #f4fbf7;
    --white: #ffffff;
    --text: #111827;
    --gray: #4b5563;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: #f8fafc;
    color: var(--text);
    margin: 0;
    line-height: 1.6;
    animation: fadeInUp 0.5s ease-out;
}

header {
    background: linear-gradient(135deg, var(--green), #004d26);
    color: var(--white);
    padding: 2.5rem 1rem 3rem;
    text-align: center;
    border-bottom: 5px solid var(--green-accent);
}

.nav-bar {
    max-width: 1050px;
    margin: 0 auto 1.5rem;
    text-align: left;
}

.back-link {
    color: #d1fae5;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--white);
    text-decoration: underline;
}

header h1 {
    margin: 0 0 8px;
    font-size: 2.3rem;
    font-weight: 800;
}

header p {
    margin: 0;
    color: #d1fae5;
    font-size: 1.05rem;
}

main {
    max-width: 1050px;
    margin: 2.5rem auto;
    padding: 0 1.2rem;
}

section {
    background: var(--white);
    padding: 2.2rem;
    margin-bottom: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 102, 51, 0.08);
}

h2 {
    color: var(--green);
    margin-top: 0;
    font-size: 1.7rem;
    font-weight: 700;
}

/* Subject Grid */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.2rem;
    margin-top: 1.5rem;
}

.subject-card {
    background: var(--light-bg);
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.2rem 1rem;
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
}

.subject-card:hover {
    transform: translateY(-5px);
    border-color: var(--green);
    background: var(--white);
    box-shadow: 0 10px 20px rgba(0, 102, 51, 0.1);
}

.subject-card .icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
}

.subject-card h3 {
    margin: 0 0 4px;
    color: var(--green);
    font-size: 1.1rem;
    font-weight: 700;
}

.subject-card p {
    margin: 0;
    color: var(--gray);
    font-size: 0.82rem;
}

/* Resource Cards inside Subject Sections */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.2rem;
    margin-top: 1.5rem;
}

.resource-card {
    background: var(--light-bg);
    border: 1px solid #e2e8f0;
    border-top: 4px solid var(--green);
    border-radius: 10px;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.resource-card:hover {
    transform: translateY(-4px);
    background: var(--white);
    box-shadow: 0 8px 20px rgba(0, 102, 51, 0.08);
}

/* Badges for PDF, Past Paper, Guess Paper */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 20px;
    margin-bottom: 0.8rem;
    width: fit-content;
}

.badge.pdf { background: #dbeafe; color: #1e40af; }
.badge.past-paper { background: #d1fae5; color: #065f46; }
.badge.guess { background: #fef3c7; color: #92400e; }
.badge.notes { background: #fce7f3; color: #9d174d; }

.resource-card h3 {
    margin: 0 0 6px;
    font-size: 1.2rem;
    color: var(--text);
    font-weight: 700;
}

.resource-card p {
    margin: 0 0 1.2rem;
    color: var(--gray);
    font-size: 0.88rem;
}

.btn-download {
    background: var(--green);
    color: var(--white);
    text-align: center;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-download:hover {
    background: var(--green-accent);
}

footer {
    background: var(--green);
    color: var(--white);
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 4rem;
    border-top: 4px solid var(--green-accent);
}

footer p {
    margin: 0;
    color: #d1fae5;
}