/* ========== SIDEBAR ========== */
aside.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--surface-container-lowest);
    border-right: 1px solid var(--outline-variant);
    display: flex;
    flex-direction: column;
    padding: 1rem;
    z-index: 40;
    transition: width 0.2s ease, padding 0.2s ease;

    .brand {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
        padding: 0 0.5rem;

        .collapse-btn {
            background: none;
            border: none;
            cursor: pointer;
            color: var(--on-surface-variant);
            padding: 0.25rem;
            border-radius: var(--border-radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;

            &:hover {
                background: var(--surface-container-high);
                color: var(--on-surface);
            }

            .material-symbols-outlined {
                font-size: 1.25rem;
            }
        }

        .brand-text {
            overflow: hidden;
            white-space: nowrap;

            h1 {
                font-size: 1.25rem;
                font-weight: 700;
                color: var(--primary);
                letter-spacing: -0.01em;
                line-height: 1.3;
            }

            p {
                font-size: 0.75rem;
                color: var(--on-surface-variant);
                margin-top: 0.25rem;
            }
        }
    }

    .cta {
        width: 100%;
        height: 2.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        background: var(--primary);
        color: var(--on-primary);
        border: none;
        border-radius: var(--border-radius-md);
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.02em;
        cursor: pointer;
        text-decoration: none;
        margin-bottom: 1.5rem;
        transition: opacity var(--transition);

        &:hover {
            opacity: 0.9;
        }

        .material-symbols-outlined {
            font-size: 1.25rem;
        }
    }

    nav {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 0.25rem;

        a.link {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            border-radius: var(--border-radius-md);
            font-size: 0.75rem;
            font-weight: 500;
            text-decoration: none;
            color: var(--on-surface-variant);
            transition: all var(--transition);
            cursor: pointer;

            &:hover {
                background: var(--surface-container-low);
                color: var(--on-surface);
            }

            &.active {
                background: var(--primary-container);
                color: var(--primary);
                font-weight: 700;
            }

            .material-symbols-outlined {
                font-size: 1.25rem;
            }
        }
    }

    footer {
        margin-top: auto;
        padding-top: 1rem;
        border-top: 1px solid var(--outline-variant);

        .user {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.5rem;
            margin-top: 0.75rem;

            .avatar {
                width: 2rem;
                height: 2rem;
                border-radius: 50%;
                background: var(--surface-container-high);
                display: flex;
                align-items: center;
                justify-content: center;
                color: var(--on-surface);
                font-size: 1rem;
                font-weight: 700;
                flex-shrink: 0;
            }

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

                .name {
                    font-size: 0.75rem;
                    font-weight: 600;
                    color: var(--on-surface);
                }

                .status {
                    font-size: 0.75rem;
                    color: var(--on-surface-variant);
                }
            }
        }
    }
}

/* ---------- COLLAPSED ---------- */
body.sidebar-collapsed aside.sidebar {
    width: 3.5rem;
    padding: 0.5rem;

    .brand .brand-text {
        display: none;
    }

    .cta {
        padding: 0;
        width: 2.5rem;
        height: 2.5rem;
        margin-left: auto;
        margin-right: auto;
        border-radius: 50%;

        span:not(.material-symbols-outlined) {
            display: none;
        }
    }

    nav a.link {
        justify-content: center;
        padding: 0.75rem 0.5rem;

        span:not(.material-symbols-outlined) {
            display: none;
        }
    }

    footer .user .info {
        display: none;
    }
}

body.sidebar-collapsed main {
    margin-left: 3.5rem;
    width: calc(100% - 3.5rem);
}

/* ========== MAIN LAYOUT ========== */
main {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    display: flex;
    flex-direction: column;
    height: 100dvh;
    transition: margin-left 0.2s ease, width 0.2s ease;
}

/* ========== TOP NAVBAR ========== */
header.topnav {
    height: var(--topnav-height);
    border-bottom: 1px solid var(--outline-variant);
    background: var(--surface);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0 1.5rem;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 30;

    h1 {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--on-surface);
        letter-spacing: -0.01em;
        white-space: nowrap;
        margin-right: auto;
    }

    search {
        position: relative;
        width: 15rem;

        .material-symbols-outlined {
            position: absolute;
            left: 0.5rem;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.25rem;
            color: var(--on-surface-variant);
            pointer-events: none;
        }

        input {
            width: 100%;
            height: 2rem;
            padding: 0 0.5rem 0 2rem;
            border: 1px solid var(--outline-variant);
            border-radius: var(--border-radius-sm);
            background: var(--surface-container-lowest);
            font-size: 0.75rem;
            color: var(--on-surface);
            outline: none;
            transition: border-color var(--transition);

            &:focus {
                border-color: var(--primary);
            }

            &::placeholder {
                color: var(--on-surface-variant);
                opacity: 0.6;
            }
        }
    }
}

/* ========== MAIN CONTENT ========== */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 64em) {
    header.topnav search {
        width: 10rem;
    }
}

@media (max-width: 48em) {
    body:not(.sidebar-collapsed) aside.sidebar {
        width: 3.5rem;
        padding: 0.5rem;

        .brand .brand-text,
        .cta span:not(.material-symbols-outlined),
        nav a.link span:not(.material-symbols-outlined),
        .user .info {
            display: none;
        }

        .cta {
            padding: 0;
            width: 2.5rem;
            height: 2.5rem;
            margin: 0 auto 1rem;
            border-radius: 50%;
        }

        nav a.link {
            justify-content: center;
            padding: 0.75rem 0.5rem;
        }

        .user {
            justify-content: center;
        }
    }

    body.sidebar-collapsed aside.sidebar {
        width: 0;
        padding: 0;
        overflow: hidden;
        border-right: none;
    }

    body.sidebar-collapsed main {
        margin-left: 0;
        width: 100%;
    }

    main {
        margin-left: 3.5rem;
        width: calc(100% - 3.5rem);
    }

    header.topnav {
        padding: 0 0.75rem;

        search {
            display: none;
        }
    }

    .main-content {
        padding: 0.5rem;
    }
}