/* FNS TUTON TRACKER — RESPONSIVE LAYOUT */

@media (max-width: 1180px) {
    .header-inner {
        grid-template-columns: minmax(300px, 1fr) auto;
    }

    .header-actions {
        grid-column: 1 / -1;
        justify-content: flex-start;
    }

    .session-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .page-shell {
        width: min(100% - 28px, 1440px);
    }

    .header-inner {
        grid-template-columns: 1fr;
        gap: 15px;
        padding-block: 22px;
    }

    .header-status {
        align-items: stretch;
        justify-content: space-between;
    }

    .progress-panel {
        width: min(320px, 100%);
    }

    .header-actions {
        grid-column: auto;
    }

    .summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .course-management-grid {
        grid-template-columns: 1fr;
    }

    .deadline-item {
        grid-template-columns: minmax(180px, 1fr) minmax(120px, .7fr) auto;
        gap: 7px 14px;
    }

    .deadline-activity,
    .deadline-date {
        grid-row: 2;
    }

    .countdown {
        grid-column: 3;
        grid-row: 1 / 3;
    }
}

@media (max-width: 720px) {
    .page-shell {
        width: min(100% - 22px, 1440px);
    }

    .brand-block {
        align-items: flex-start;
    }

    .brand-mark {
        width: 43px;
        height: 43px;
    }

    .header-status {
        flex-direction: column;
    }

    .semester-badge,
    .progress-panel {
        width: 100%;
    }

    .semester-badge {
        text-align: center;
    }

    .header-actions {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .btn {
        padding-inline: 7px;
    }

    main {
        padding-top: 20px;
    }

    .summary-grid {
        gap: 9px;
    }

    .summary-card {
        min-height: 118px;
        padding: 15px;
    }

    .summary-value {
        font-size: 24px;
    }

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

    .toolbar {
        align-items: stretch;
        flex-direction: column;
    }

    .search-wrap {
        width: 100%;
    }

    .tracker-shell {
        display: none;
    }

    .mobile-tracker {
        display: grid;
        gap: 12px;
    }

    .course-card {
        overflow: hidden;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        background: rgba(9, 22, 34, .9);
        box-shadow: var(--shadow);
    }

    .mobile-card-head {
        padding: 16px;
        border-bottom: 1px solid var(--border);
        background: rgba(13, 31, 46, .8);
    }

    .mobile-card-fields {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 118px;
        gap: 9px;
    }

    .mobile-field-label {
        display: block;
        margin-bottom: 5px;
        color: #7893a1;
        font-size: 11px;
        font-weight: 700;
    }

    .mobile-progress {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        margin-top: 14px;
    }

    .mobile-progress strong {
        font-family: var(--font-mono);
        font-size: 13px;
    }

    .mobile-progress .mini-track {
        width: min(230px, 65%);
        margin-top: 0;
    }

    .mobile-session-list {
        display: grid;
    }

    .mobile-session-row {
        padding: 13px 16px;
        border-bottom: 1px solid rgba(0, 215, 230, .075);
    }

    .mobile-session-row:last-child {
        border-bottom: 0;
    }

    .mobile-session-row.is-done {
        background: rgba(54, 217, 128, .06);
    }

    .mobile-session-row.is-due {
        background: rgba(246, 185, 74, .055);
    }

    .mobile-session-row.is-overdue {
        background: rgba(255, 107, 128, .055);
    }

    .mobile-session-main {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .mobile-session-copy {
        min-width: 0;
        flex: 1;
    }

    .mobile-session-copy strong {
        display: block;
        font-size: 13px;
    }

    .mobile-session-copy span {
        display: block;
        margin-top: 2px;
        color: var(--secondary);
        font-size: 12px;
    }

    .mobile-session-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        margin: 9px 35px 0 28px;
        color: #7893a1;
        font-size: 11px;
    }

    .deadline-item {
        grid-template-columns: 1fr auto;
        gap: 5px 12px;
        padding: 14px 15px;
    }

    .deadline-session,
    .deadline-activity,
    .deadline-date {
        grid-column: 1;
        grid-row: auto;
    }

    .countdown {
        grid-column: 2;
        grid-row: 1 / 5;
    }
}

@media (max-width: 470px) {
    .brand-copy h1 {
        font-size: 20px;
    }

    .brand-copy p {
        font-size: 11px;
    }

    .header-actions {
        grid-template-columns: 1fr;
    }

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

    .summary-card {
        min-height: 105px;
    }

    .section-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .courses-section .section-heading .btn {
        width: 100%;
    }

    .course-management-card {
        grid-template-columns: auto minmax(0, 1fr);
        padding: 14px;
    }

    .course-management-actions {
        grid-column: 1 / -1;
        justify-content: stretch;
    }

    .course-management-actions .btn {
        flex: 1;
    }

    .modal-backdrop {
        align-items: end;
        padding: 10px;
    }

    .modal-panel {
        max-height: calc(100vh - 20px);
        overflow-y: auto;
        padding: 18px;
    }

    .modal-form-grid {
        grid-template-columns: 1fr;
    }

    .modal-field-wide {
        grid-column: auto;
    }

    .modal-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .filter-group {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .mobile-card-fields {
        grid-template-columns: 1fr;
    }

    .mobile-session-meta {
        margin-right: 0;
    }

    .deadline-item {
        grid-template-columns: 1fr;
    }

    .countdown {
        grid-column: 1;
        grid-row: auto;
        justify-self: start;
        margin-top: 4px;
    }

    .site-footer {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}