/* ==========================================================================
   Compose Sheet
   Quick-capture overlay — bottom sheet (mobile), centered modal (desktop).
   Uses design tokens from main.css. Shell-level — persists across SPA swaps.
   ========================================================================== */

/* Overlay — covers entire viewport */
.compose-sheet-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.compose-sheet-overlay[hidden] {
    display: none;
}

/* Backdrop */
.compose-sheet-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    animation: sheetFadeIn var(--transition-base) ease-out;
}

/* Sheet — mobile-first bottom sheet */
.compose-sheet {
    position: relative;
    width: 100%;
    max-height: 85vh;
    max-height: 85dvh;
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    animation: sheetSlideUp var(--transition-base) ease-out;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.compose-sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-4) var(--spacing-2);
    border-bottom: 1px solid var(--color-border-light);
}

.compose-sheet-heading {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
}

.compose-sheet-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    line-height: 1;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    border-radius: var(--radius-base);
}

.compose-sheet-close:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
}

/* --------------------------------------------------------------------------
   Title toggle + input
   -------------------------------------------------------------------------- */

.compose-sheet-title-group {
    padding: var(--spacing-2) var(--spacing-4) 0;
}

.compose-sheet-title-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--spacing-1) 0;
}

.compose-sheet-title-toggle:hover {
    color: var(--color-primary);
}

.compose-sheet-title-input {
    display: none;
    width: 100%;
    margin-top: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
}

.compose-sheet-title-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-focus-ring);
}

.compose-sheet-title-group.expanded .compose-sheet-title-input {
    display: block;
}

/* --------------------------------------------------------------------------
   Draft recovery notice
   -------------------------------------------------------------------------- */

.compose-sheet-draft-notice {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: var(--spacing-2) var(--spacing-4) 0;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.compose-sheet-draft-notice[hidden] {
    display: none;
}

.compose-sheet-draft-discard {
    background: none;
    border: none;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    text-decoration: underline;
}

.compose-sheet-draft-discard:hover {
    color: var(--color-error-text);
}

/* --------------------------------------------------------------------------
   Save warning (localStorage unavailable)
   -------------------------------------------------------------------------- */

.compose-sheet-save-warning {
    margin: var(--spacing-2) var(--spacing-4) 0;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
    color: var(--color-warning);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    border-left: 2px solid var(--color-warning);
}

.compose-sheet-save-warning[hidden] {
    display: none;
}

/* --------------------------------------------------------------------------
   Textarea
   -------------------------------------------------------------------------- */

.compose-sheet-textarea {
    flex: 1;
    min-height: 120px;
    max-height: 300px;
    margin: var(--spacing-3) var(--spacing-4);
    padding: var(--spacing-3);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    resize: none;
    outline: none;
    overflow-y: auto;
}

.compose-sheet-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-focus-ring);
}

.compose-sheet-textarea::placeholder {
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.compose-sheet-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-2) var(--spacing-4) var(--spacing-4);
    border-top: 1px solid var(--color-border-light);
}

.compose-sheet-wordcount {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: capitalize;
}

.compose-sheet-actions {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-1);
}

.compose-sheet-save-draft {
    padding: var(--spacing-2) var(--spacing-5);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-inverse);
    background-color: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.compose-sheet-save-draft:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.compose-sheet-save-draft:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.compose-sheet-publish-link {
    padding: var(--spacing-1) var(--spacing-2);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    background: none;
    border: none;
    cursor: pointer;
}

.compose-sheet-publish-link:hover {
    color: var(--color-text-primary);
}

.compose-sheet-publish-link:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Desktop — centered modal
   -------------------------------------------------------------------------- */

@media (min-width: 481px) {
    .compose-sheet-overlay {
        align-items: center;
    }

    .compose-sheet {
        max-width: 480px;
        border-radius: var(--radius-xl);
        animation-name: sheetFadeScale;
    }
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */

@keyframes sheetFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes sheetSlideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes sheetFadeScale {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    .compose-sheet-backdrop {
        animation-duration: 0.01ms !important;
    }

    .compose-sheet {
        animation-duration: 0.01ms !important;
    }

    .compose-sheet-save-draft {
        transition: none;
    }

    .compose-sheet-save-draft:hover {
        transform: none;
    }
}