/* App surfaces aligned with landing page aesthetics */
:root {
    --app-max-width: 1120px;
    --app-shell-padding-top: clamp(8rem, 12vw, 11rem);
    --app-shell-padding-x: clamp(1.5rem, 5vw, 3.5rem);
    --app-shell-padding-bottom: clamp(4rem, 7vw, 6.5rem);
    --app-card-radius: 26px;
    --app-card-padding: clamp(1.75rem, 3vw, 2.5rem);
    --app-card-shadow: 0 22px 46px rgba(15, 23, 42, 0.08);
    --app-card-shadow-hover: 0 30px 58px rgba(15, 23, 42, 0.14);
    --app-surface: rgba(255, 255, 255, 0.88);
    --app-surface-strong: rgba(255, 255, 255, 0.95);
    --app-surface-soft: rgba(15, 23, 42, 0.045);
    --app-border: rgba(15, 23, 42, 0.08);
    --app-border-strong: rgba(15, 23, 42, 0.16);
    --app-text: #0f172a;
    --app-text-muted: rgba(15, 23, 42, 0.66);
    --app-text-soft: rgba(15, 23, 42, 0.48);
    --app-text-subtle: rgba(15, 23, 42, 0.32);
    --app-accent: #111827;
    --app-accent-soft: rgba(17, 24, 39, 0.08);
    --app-success: #047857;
    --app-warning: #b45309;
    --app-danger: #dc2626;
    --app-ease: cubic-bezier(0.18, 0.88, 0.32, 1);
    --app-font-display: 'Inter', var(--default-font-family, ui-sans-serif);
}

.app-shell {
    width: min(100%, var(--app-max-width));
    margin: 0 auto;
    padding: var(--app-shell-padding-top) var(--app-shell-padding-x) var(--app-shell-padding-bottom);
    display: flex;
    flex-direction: column;
    gap: clamp(2rem, 5vw, 3.5rem);
    color: var(--app-text);
    flex: 1 1 auto;
    min-height: 0;
}

.app-shell--assistant {
    width: 100%;
    max-width: none;
    padding: 0;
    gap: 0;
}

.app-page-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-end;
    gap: 1.5rem;
}

.app-page-heading {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.app-eyebrow {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    font-weight: 550;
    color: var(--app-text-soft);
}

.app-page-title {
    font-family: var(--app-font-display);
    font-size: clamp(2.1rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--app-text);
}

.app-page-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--app-text-muted);
    max-width: 40rem;
    line-height: 1.6;
}

.app-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.app-section {
    display: flex;
    flex-direction: column;
    gap: clamp(1.5rem, 3vw, 2rem);
}

.app-section--chat {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.app-section--chat .app-chat {
    flex: 1 1 auto;
}

.app-section-title {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--app-text);
}

.app-card {
    position: relative;
    border-radius: var(--app-card-radius);
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    padding: var(--app-card-padding);
    box-shadow: var(--app-card-shadow);
    backdrop-filter: blur(26px);
    transition: transform 0.25s var(--app-ease), box-shadow 0.25s var(--app-ease), border-color 0.25s ease;
    overflow: hidden;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--app-card-shadow-hover);
    border-color: var(--app-border-strong);
}

.app-card--interactive {
    cursor: pointer;
}

.app-card--highlight {
    background: linear-gradient(142deg, rgba(17, 24, 39, 0.09), rgba(17, 24, 39, 0.03));
    color: var(--app-text);
}

.app-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: clamp(1rem, 3vw, 1.5rem);
}

.app-card__icon {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 1.35rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.3));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6), inset 0 -8px 18px rgba(15, 23, 42, 0.12), 0 20px 40px rgba(15, 23, 42, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.65);
    font-size: 1.6rem;
}

.app-card__title {
    font-size: clamp(1.3rem, 2.5vw, 1.7rem);
    font-weight: 600;
    letter-spacing: -0.015em;
    color: inherit;
}

.app-card__eyebrow {
    font-size: 0.8rem;
    font-weight: 550;
    letter-spacing: 0.16em;
    color: var(--app-text-soft);
    text-transform: uppercase;
}

.app-card__description {
    color: var(--app-text-muted);
    font-size: 1rem;
    line-height: 1.65;
}

.app-card__footer {
    margin-top: clamp(1.25rem, 3vw, 1.75rem);
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.app-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    color: var(--app-text-soft);
    font-size: 0.85rem;
}

.app-grid {
    display: grid;
    gap: clamp(1.25rem, 3vw, 1.75rem);
}

.app-grid--two {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.app-grid--three {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.app-note {
    min-height: 160px;
    border-radius: 22px;
    padding: clamp(1.5rem, 3vw, 2rem);
    background: var(--app-surface-soft);
    border: 1px dashed var(--app-border);
    color: var(--app-text-muted);
    white-space: pre-wrap;
    line-height: 1.7;
}

.app-note.is-loaded {
    border-style: solid;
    background: var(--app-surface);
    color: var(--app-text);
}

.app-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    background: var(--app-surface-soft);
    color: var(--app-text-muted);
    font-size: 0.82rem;
    letter-spacing: 0.02em;
}

.app-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    padding: 0.85rem 1.65rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.98rem;
    font-weight: 550;
    letter-spacing: -0.01em;
    color: #ffffff;
    background: var(--app-accent);
    box-shadow: 0 18px 32px rgba(17, 24, 39, 0.22);
    transition: transform 0.2s var(--app-ease), box-shadow 0.2s var(--app-ease), opacity 0.2s ease;
    text-decoration: none;
}

.app-button:hover,
.app-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 24px 42px rgba(17, 24, 39, 0.26);
}

.app-button--secondary {
    background: transparent;
    color: var(--app-text);
    border-color: var(--app-border-strong);
    box-shadow: none;
}

.app-button--secondary:hover,
.app-button--secondary:focus-visible {
    background: var(--app-surface-soft);
    box-shadow: none;
}

.app-button--ghost {
    background: transparent;
    color: var(--app-text-muted);
    border-color: transparent;
    box-shadow: none;
}

.app-button--ghost:hover,
.app-button--ghost:focus-visible {
    color: var(--app-text);
    background: var(--app-surface-soft);
}

.app-button[disabled],
.app-button.is-disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.app-link {
    font-weight: 500;
    color: var(--app-text);
    text-decoration: underline;
    text-decoration-color: rgba(15, 23, 42, 0.2);
    transition: text-decoration-color 0.2s ease, color 0.2s ease;
    cursor: pointer;
}

.app-link:hover,
.app-link:focus-visible {
    text-decoration-color: rgba(15, 23, 42, 0.5);
}

.app-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.95rem;
    border-radius: 999px;
    font-size: 0.85rem;
    background: var(--app-surface-soft);
    color: var(--app-text-muted);
}

.app-divider {
    height: 1px;
    width: 100%;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.12), rgba(15, 23, 42, 0));
}

.app-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    margin: 0;
    padding: 0;
}

.app-list__item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--app-text-muted);
    font-size: 0.96rem;
}

.app-icon {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 0.85rem;
    background: var(--app-surface-soft);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.app-field {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.app-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-weight: 560;
    color: var(--app-text-soft);
}

.app-input,
.app-select,
.app-textarea {
    width: 100%;
    border-radius: 18px;
    border: 1px solid var(--app-border);
    background: var(--app-surface-strong);
    padding: 0.85rem 1rem;
    font-size: 1rem;
    font-family: var(--app-font-display);
    color: var(--app-text);
    transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.app-input:focus,
.app-select:focus,
.app-textarea:focus {
    outline: none;
    border-color: rgba(17, 24, 39, 0.35);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.1);
}

.app-select {
    appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--app-text-soft) 50%),
                      linear-gradient(135deg, var(--app-text-soft) 50%, transparent 50%);
    background-position: calc(100% - 1.6rem) calc(1.1rem), calc(100% - 1.2rem) calc(1.1rem);
    background-size: 6px 6px;
    background-repeat: no-repeat;
    padding-right: 3rem;
}

.app-select::-ms-expand {
    display: none;
}

.app-checkbox {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    font-size: 0.94rem;
    color: var(--app-text-muted);
}

.app-checkbox input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    margin-top: 0.15rem;
    accent-color: var(--app-accent);
}

.app-inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.app-surface-soft {
    background: var(--app-surface-soft);
    border-radius: 20px;
    padding: 1.5rem;
}

.app-status {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.88rem;
    font-weight: 500;
}

.app-status.ok {
    color: var(--app-success);
}

.app-status.warn {
    color: var(--app-warning);
}

.app-status.error {
    color: var(--app-danger);
}

.app-toast-container {
    position: fixed;
    top: clamp(1.5rem, 4vw, 2.5rem);
    right: clamp(1.5rem, 4vw, 3rem);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 1000;
}

.app-toast {
    min-width: 240px;
    max-width: 360px;
    border-radius: 22px;
    background: var(--app-surface-strong);
    border: 1px solid var(--app-border);
    box-shadow: 0 18px 38px rgba(15, 23, 42, 0.14);
    padding: 1rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    animation: app-toast-in 0.28s var(--app-ease);
}

.app-toast__message {
    font-size: 0.95rem;
    color: var(--app-text);
    line-height: 1.5;
}

.app-toast__close {
    background: transparent;
    border: none;
    color: var(--app-text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    line-height: 1;
}

.app-toast.info {
    border-color: rgba(59, 130, 246, 0.2);
}

.app-toast.success {
    border-color: rgba(5, 150, 105, 0.2);
}

.app-toast.error {
    border-color: rgba(220, 38, 38, 0.25);
}

@keyframes app-toast-in {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes app-toast-out {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(-10px);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .app-shell {
        padding-top: clamp(7rem, 18vw, 8.5rem);
    }

    .app-card {
        padding: clamp(1.35rem, 5vw, 1.75rem);
    }

    .app-card__header {
        flex-direction: column;
        align-items: flex-start;
    }

    .app-toast-container {
        left: clamp(1rem, 5vw, 1.5rem);
        right: clamp(1rem, 5vw, 1.5rem);
    }

    .app-toast {
        max-width: unset;
    }
}

.app-section--center {
    align-items: center;
    text-align: center;
}

.app-card__header--center,
.app-card__footer--center,
.app-card__description--center {
    justify-content: center;
    text-align: center;
}

.app-card__heading {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.app-auth-card {
    max-width: 520px;
    width: 100%;
    text-align: center;
}

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

.app-button--google {
    background: #111827;
}

.app-inline-note {
    margin-top: 1.5rem;
    font-size: 0.95rem;
    color: var(--app-text-muted);
}

.app-note__empty {
    text-align: center;
    color: var(--app-text-soft);
    font-size: 0.95rem;
}

.app-card__title + .app-card__description {
    margin-top: 0.75rem;
}

.app-card h3.app-card__title {
    font-size: clamp(1.15rem, 2.2vw, 1.4rem);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.app-card__meta--stack {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.app-collection-list {
    margin-top: 1.25rem;
}

.app-collection-items {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.app-collection-item {
    display: flex;
    gap: 0.9rem;
    align-items: center;
    padding: 0.75rem 1rem;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(15, 23, 42, 0.05);
}

.app-collection-item__icon {
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 1.1rem;
    background: rgba(17, 24, 39, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.app-collection-item__meta {
    display: flex;
    flex-direction: column;
}

.app-collection-item__name {
    font-weight: 550;
    color: var(--app-text);
}

.app-collection-item__count {
    font-size: 0.85rem;
    color: var(--app-text-soft);
}

.app-mini-card-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.app-mini-card {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    border-radius: 24px;
    border: 1px solid var(--app-border);
    background: var(--app-surface-soft);
    padding: clamp(1.4rem, 3vw, 1.8rem);
    height: 100%;
}

.app-mini-card__header {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.app-mini-card__title {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0;
}

.app-mini-card__caption {
    margin: 0.25rem 0 0;
    color: var(--app-text-muted);
    font-size: 0.92rem;
    line-height: 1.4;
}

.app-details {
    border-radius: 18px;
    border: 1px solid var(--app-border);
    background: rgba(255, 255, 255, 0.65);
    padding: 0.9rem 1rem;
}

.app-details summary {
    cursor: pointer;
    font-weight: 550;
    color: var(--app-text);
    list-style: none;
}

.app-details summary::-webkit-details-marker {
    display: none;
}

.app-details[open] {
    border-color: var(--app-border-strong);
}

.app-details__body {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--app-text-muted);
    line-height: 1.5;
}

.app-button--block {
    width: 100%;
    justify-content: center;
}

.app-status-banner {
    display: flex;
    gap: 1rem;
    align-items: center;
    border-radius: 24px;
    border: 1px solid var(--app-border);
    background: var(--app-surface-soft);
    padding: 1.1rem 1.4rem;
}

.app-status-banner__icon {
    font-size: 1.6rem;
}

.app-status-banner__title {
    font-weight: 600;
    color: var(--app-text);
    margin: 0;
}

.app-status-banner__meta {
    font-size: 0.9rem;
    color: var(--app-text-muted);
    margin: 0.35rem 0 0;
}

.app-status-banner--running {
    border-color: rgba(59, 130, 246, 0.25);
    background: rgba(59, 130, 246, 0.08);
}

.app-status-banner--success {
    border-color: rgba(16, 185, 129, 0.25);
    background: rgba(16, 185, 129, 0.08);
}

.app-status-banner--error {
    border-color: rgba(220, 38, 38, 0.25);
    background: rgba(220, 38, 38, 0.08);
}

.app-search-grid {
    margin-top: 1.5rem;
}

.app-search-controls {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.app-search-actions {
    margin-top: 1.5rem;
    justify-content: space-between;
    gap: 1rem;
}

.app-search-results {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.app-search-results__list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.app-search-result {
    border: 1px solid var(--app-border);
    border-radius: 20px;
    padding: 1.1rem 1.3rem;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.08);
}

.app-search-result__header {
    display: flex;
    gap: 0.85rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.app-search-result__index {
    width: 2rem;
    height: 2rem;
    border-radius: 0.9rem;
    background: var(--app-accent);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.app-search-result__meta {
    font-size: 0.85rem;
    color: var(--app-text-soft);
    margin-top: 0.3rem;
}

.app-search-result__preview {
    margin: 0;
    color: var(--app-text-muted);
    line-height: 1.6;
}

.app-history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.app-status.muted {
    color: var(--app-text-soft);
    display: inline-flex;
    gap: 0.4rem;
    align-items: center;
}

.app-button.is-disabled {
    opacity: 0.6;
}

@media (max-width: 768px) {
    .app-card__meta--stack {
        align-items: flex-start;
    }

    .app-search-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

.app-task-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.app-task-item {
    border-radius: 16px;
    border: 1px solid var(--app-border);
    background: var(--app-surface-soft);
    padding: 0.7rem 1rem;
    transition: background 0.2s ease;
}

.app-task-item[open] {
    background: var(--app-surface);
}

.app-task-item__summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 550;
    color: var(--app-text);
    list-style: none;
}

.app-task-item__summary::-webkit-details-marker {
    display: none;
}

.app-task-item__summary:after {
    content: '';
    border: solid var(--app-text-soft);
    border-width: 0 2px 2px 0;
    display: inline-block;
    padding: 3px;
    transform: rotate(45deg);
    transition: transform 0.2s ease;
}

.app-task-item[open] .app-task-item__summary:after {
    transform: rotate(-135deg);
}

.app-task-item__title {
    font-size: 1rem;
}

.app-task-item__dueDate {
    font-size: 0.85rem;
    color: var(--app-text-muted);
}

.app-task-item__details {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--app-border);
    color: var(--app-text-muted);
    line-height: 1.5;
}