.container {
    max-width: 1400px;
    margin: 20px auto;
    background: var(--color-background-secondary);
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 40px var(--color-shadow-large);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 40px);
    animation: fadeInScale 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 24px;
    flex-grow: 1;
    align-items: stretch;
}

.flex-grow-1 {
    flex-grow: 1;
}

.flex-grow-2 {
    flex-grow: 2;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

.grid-2-cols {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.grid-3-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-normal { font-weight: 400; }

.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.hidden {
    display: none !important;
}

.invisible {
    visibility: hidden;
}

@media (max-width: 1200px) {
    .container {
        max-width: 95%;
    }
}

@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .container {
        margin: 10px auto;
        min-height: calc(100vh - 20px);
        border-radius: 8px;
    }
}

@media (min-width: 769px) {
    .show-mobile {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .hide-mobile {
        display: none !important;
    }

    .grid-2-cols,
    .grid-3-cols {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    main {
        padding: 16px;
        gap: 12px;
    }

    .container {
        margin: 5px auto;
        border-radius: 6px;
    }
}