/* HERO section for exam schedule page */
.hero-plannings {
    background: linear-gradient(rgba(13, 33, 73, 0.9), rgba(0, 90, 158, 0.7)), url('https://images.unsplash.com/photo-1541339907198-e08756dedf3f?q=80&w=2070&auto=format&fit=crop') no-repeat center center/cover;
    background-size: cover; 
    background-position: center; 
    color: white;
    padding: var(--spacing-xxl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 400px; /* Adjusted height for this specific hero */
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 -10px 30px rgba(0,0,0,0.3);
    border-bottom-left-radius: 50% 20px; 
    border-bottom-right-radius: 50% 20px;
}

.hero-plannings h1 {
    color: white;
    font-size: 3.5rem;
    margin-bottom: var(--spacing-s);
    text-shadow: 0 5px 15px rgba(0,0,0,0.4);
    letter-spacing: 1px;
}
.hero-plannings p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

/* Planning Section Specific Styles */
.planning-section {
    background-color: var(--color-background);
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

.planning-header {
    margin-bottom: var(--spacing-xl);
}

.planning-header h2 {
    font-size: 2.5rem;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-s);
}

.planning-header h3 {
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-m);
}

.planning-header p {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-bottom: var(--spacing-m);
}

.planning-header p::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background-color: var(--color-primary-blue);
}

.semester-block {
    background-color: var(--color-background-alt);
    border-radius: var(--radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow);
    border: 1px solid #e0e6ea; /* Subtle border for definition */
}

.semester-block h4 {
    font-size: 1.6rem;
    color: var(--color-primary-blue);
    margin-bottom: var(--spacing-l);
    position: relative;
    padding-bottom: var(--spacing-s);
}

.semester-block h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--color-vibrant-green);
}

.planning-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-m); /* Space between buttons */
}

.planning-links a {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--color-vibrant-green); /* Default button color */
    color: white;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 10px rgba(0, 158, 86, 0.2);
    transition: var(--transition);
    white-space: nowrap; /* Prevent text wrapping */
    text-align: center; /* Ensure text is centered if it wraps */
    justify-content: center; /* Ensure text is centered if it wraps */
}
.planning-links a:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

/* Alternating button colors for visual variety */
.semester-block:nth-child(odd) .planning-links a {
    background-color: var(--color-primary-blue);
    box-shadow: 0 4px 10px rgba(0, 90, 158, 0.2);
}
.semester-block:nth-child(odd) .planning-links a:hover {
    background-color: var(--color-vibrant-orange);
    box-shadow: 0 6px 15px rgba(245, 158, 11, 0.2);
}

.semester-block:nth-child(even) .planning-links a {
    background-color: var(--color-vibrant-green);
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
}
.semester-block:nth-child(even) .planning-links a:hover {
    background-color: var(--color-primary-dark);
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

/* Media Queries pour le responsive (adapté à cette page) */
@media(max-width: 992px) {
    .hero-plannings h1 { font-size: 2.8rem; }
    .hero-plannings p { font-size: 1rem; }
    .planning-header h2 { font-size: 2rem; }
    .planning-header h3 { font-size: 1.4rem; }
    .semester-block h4 { font-size: 1.3rem; }
    .planning-links a { font-size: 0.85rem; padding: 8px 15px; }
}

@media(max-width: 768px) {
    html { font-size: 15px; }
    .hero-plannings { min-height: 300px; padding: var(--spacing-xl) 0; }
    .hero-plannings h1 { font-size: 2.2rem; }
    .planning-section { padding: var(--spacing-xl) 0; }
    .semester-block { padding: var(--spacing-l); margin-bottom: var(--spacing-l); }
    .planning-links { gap: var(--spacing-s); }
    .planning-links a { font-size: 0.8rem; padding: 6px 12px; }
}

@media(max-width: 480px) {
    .hero-plannings h1 { font-size: 1.8rem; }
    .planning-links a { font-size: 0.75rem; padding: 5px 10px; }
}