* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    height: 100vh;
    overflow: hidden;
}

#app {
    width: 100vw;
    height: 100vh;
    position: relative;
}

.view {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0; left: 0;
    display: flex;
    flex-direction: column;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.view.hidden {
    opacity: 0;
    pointer-events: none;
    z-index: -1;
    transform: scale(0.97);
}
.view.active {
    opacity: 1;
    pointer-events: all;
    z-index: 10;
    transform: scale(1);
}

/* ===== HOME VIEW ===== */
.home-header {
    text-align: center;
    padding: 1.5rem 1rem 0.5rem;
}
.logo-title {
    font-size: 2.5rem;
    color: var(--color-accent);
    text-shadow: 0 2px 10px rgba(233,69,96,0.15);
}
.logo-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-dim);
    margin-top: 0.25rem;
}

.lesson-map {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 2rem 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
    align-content: start;
}

.lesson-card {
    background: var(--color-bg-card);
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.lesson-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(233,69,96,0.3);
}
.lesson-card.locked {
    opacity: 0.4;
    cursor: not-allowed;
}
.lesson-card.locked:hover {
    border-color: transparent;
    transform: none;
    box-shadow: none;
}
.lesson-card.current {
    border-color: var(--color-accent);
    box-shadow: 0 0 15px rgba(233,69,96,0.4);
}
.lesson-card .lesson-num {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-accent);
}
.lesson-card .lesson-keys {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    margin-top: 0.3rem;
}
.lesson-card .lesson-stars {
    margin-top: 0.5rem;
    font-size: 1rem;
    color: var(--color-gold);
}
.lesson-card .lock-icon {
    font-size: 1.5rem;
}