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

body {
    font-family: 'Inter', sans-serif;
    background: #0b0c10;
    color: #eef2ff;
    line-height: 1.5;
    scroll-behavior: smooth;
}

/* Fondo con grid y degradado creativo */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(circle at 10% 20%, rgba(15, 25, 45, 1) 0%, rgba(2, 5, 15, 1) 100%);
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image:
        linear-gradient(rgba(0, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.4;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* Header / Hero */
.hero {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
    padding-bottom: 2rem;
}

.badge {
    background: rgba(0, 255, 255, 0.15);
    backdrop-filter: blur(4px);
    padding: 0.3rem 1rem;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border: 1px solid rgba(0, 255, 255, 0.4);
    display: inline-block;
    color: #9effff;
}

h1 {
    font-size: 3.2rem;
    font-weight: 800;
    margin: 1rem 0 0.5rem;
    background: linear-gradient(135deg, #FFFFFF, #8dd0ff, #2dd4bf);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.02em;
}

.highlight {
    color: #2dd4bf;
    border-bottom: 2px dashed #2dd4bf;
}

.hero-info {
    background: rgba(15, 25, 45, 0.7);
    backdrop-filter: blur(8px);
    border-radius: 2rem;
    padding: 1.5rem;
    border: 1px solid rgba(0, 255, 255, 0.25);
    max-width: 400px;
}

.hero-info p {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin: 0.75rem 0;
    font-size: 1.05rem;
}

.hero-info i {
    width: 28px;
    color: #2dd4bf;
    font-size: 1.3rem;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(95deg, #0f2b3d, #0a1a2a);
    border: 1px solid #2dd4bf;
    padding: 0.7rem 1.5rem;
    border-radius: 60px;
    font-weight: 600;
    color: #ccfef2;
    transition: 0.2s;
    margin-top: 0.8rem;
    text-decoration: none;
}

.cta-button:hover {
    background: #1f4e5e;
    border-color: #9effff;
    color: white;
    transform: scale(0.97);
}

/* Sección del docente */
.teacher-card {
    background: rgba(10, 20, 35, 0.65);
    backdrop-filter: blur(12px);
    border-radius: 2rem;
    padding: 1.2rem 2rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 2rem 0 2.5rem;
    border: 1px solid rgba(45, 212, 191, 0.35);
}

.teacher-name {
    font-size: 1.6rem;
    font-weight: 700;
}

.teacher-name i {
    background: #1e293b;
    padding: 8px;
    border-radius: 50%;
    margin-right: 12px;
    color: #2dd4bf;
}

/* timeline semanal */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title i {
    font-size: 2rem;
    color: #2dd4bf;
}

.week-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.week-card {
    background: rgba(12, 20, 30, 0.75);
    backdrop-filter: blur(4px);
    border-radius: 1.5rem;
    padding: 1.2rem 1.2rem 1rem;
    transition: all 0.2s ease;
    border: 1px solid rgba(69, 160, 145, 0.3);
    display: flex;
    flex-direction: column;
}

.week-card.completed {
    border-color: #2a07f0;

    .week-number {
        background: rgba(12, 45, 231, 0.308);
    }


}

.week-card:hover {
    border-color: #2dd4bf;
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -12px rgba(0, 0, 0, 0.5);
    background: rgba(18, 30, 45, 0.9);
}

.week-card.completed:hover {
    border-color: #f7f30b;
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -12px rgba(0, 0, 0, 0.5);
    background: rgba(18, 30, 45, 0.9);
}

.week-number {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: rgba(45, 212, 191, 0.2);
    display: inline-block;
    padding: 0.2rem 0.8rem;
    border-radius: 30px;
    width: fit-content;
    font-weight: 600;
    color: #bbf0e5;
}

.week-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0.6rem 0 0.2rem;
}

.week-desc {
    font-size: 0.85rem;
    color: #b9cfec;
    margin-bottom: 1.2rem;
    line-height: 1.4;
}

.links-group {
    margin-top: auto;
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
}

.link-btn {
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 1rem;
    border-radius: 40px;
    transition: 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #dfe9ff;
}

.link-btn i {
    font-size: 0.9rem;
}

.link-materials {
    background: rgba(0, 160, 200, 0.15);
    border-color: #1899b6;
}

.link-materials:hover {
    background: #1899b6;
    color: white;
    border-color: white;
}

.link-example {
    background: rgba(45, 212, 191, 0.1);
    border-color: #2dd4bf;
}

.link-example:hover {
    background: #2dd4bf;
    color: #0a1a2a;
    border-color: white;
}

.disabled-link {
    opacity: 0.6;
    cursor: default;
    pointer-events: none;
    filter: grayscale(0.1);
}

.footer-note {
    margin-top: 3.5rem;
    text-align: center;
    font-size: 0.85rem;
    border-top: 1px solid rgba(45, 212, 191, 0.3);
    padding-top: 2rem;
    color: #90a3bf;
}

@media (max-width: 700px) {
    h1 {
        font-size: 2.2rem;
    }

    .hero {
        flex-direction: column;
        align-items: start;
        gap: 1.5rem;
    }

    .teacher-name {
        font-size: 1.3rem;
    }

    .week-grid {
        grid-template-columns: 1fr;
    }
}