/* ═══════════════════════════════════════════════════════════
   PIX — App Page Styles
   The main design generation workspace
   ═══════════════════════════════════════════════════════════ */

/* ─── Layout ─── */
.app-layout {
    display: flex;
    min-height: 100vh;
    background: var(--bg-primary);
}

/* ─── Sidebar ─── */
.app-sidebar {
    width: 320px;
    min-width: 320px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    position: relative;
    z-index: 10;
}

.sidebar-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    z-index: 5;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: var(--text-primary);
}

.sidebar-logo-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-lg);
    background: var(--gradient-brand);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: var(--text-sm);
    color: var(--bg-primary);
}

.sidebar-logo-text {
    font-size: var(--text-lg);
    font-weight: 800;
    letter-spacing: -0.5px;
}

.sidebar-logo-text span {
    color: var(--brand-primary);
}

.sidebar-back {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.sidebar-back:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.sidebar-content {
    padding: var(--space-6);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.sidebar-section-title {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--border-subtle);
}

/* Upload area inside sidebar */
.app-upload {
    border: 2px dashed var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.app-upload:hover {
    border-color: var(--brand-primary);
    background: rgba(0,212,255,0.03);
}

.app-upload.has-image {
    border-color: var(--success);
    border-style: solid;
    padding: 0;
}

.app-upload.has-image .app-upload-placeholder {
    display: none;
}

.app-upload-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.app-upload-icon {
    font-size: 32px;
    filter: grayscale(60%);
}

.app-upload-text {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.app-upload-hint {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.app-upload-preview {
    width: 100%;
    height: 160px;
    object-fit: contain;
    border-radius: var(--radius-xl);
    display: none;
    background: var(--bg-primary);
}

.app-upload.has-image .app-upload-preview {
    display: block;
}

.app-upload-change {
    position: absolute;
    bottom: var(--space-2);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    color: white;
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity 0.2s ease;
    display: none;
}

.app-upload.has-image .app-upload-change {
    display: block;
}

.app-upload.has-image:hover .app-upload-change {
    opacity: 1;
}

/* App inputs */
.app-input {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-3) var(--space-4);
    color: var(--text-primary);
    font-size: var(--text-sm);
    font-family: inherit;
    transition: border-color 0.2s ease;
    resize: none;
}

.app-input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

.app-input::placeholder {
    color: var(--text-tertiary);
}

.app-input-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    display: block;
}

/* Style chips in sidebar */
.app-styles {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.app-style-chip {
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.app-style-chip:hover {
    border-color: var(--brand-primary);
    color: var(--text-primary);
}

.app-style-chip.selected {
    background: rgba(0,212,255,0.1);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

/* Platform toggles */
.app-platforms {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.app-platform-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.app-platform-toggle:hover {
    border-color: var(--brand-primary);
}

.app-platform-toggle.selected {
    border-color: var(--brand-primary);
    background: rgba(0,212,255,0.05);
}

.app-platform-toggle-icon {
    font-size: 18px;
    width: 28px;
    text-align: center;
}

.app-platform-toggle-info {
    flex: 1;
}

.app-platform-toggle-name {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.app-platform-toggle-size {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.app-platform-toggle-check {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: transparent;
    transition: all 0.2s ease;
}

.app-platform-toggle.selected .app-platform-toggle-check {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--bg-primary);
}

/* Generate button */
.app-generate-btn {
    width: 100%;
    padding: var(--space-4);
    border-radius: var(--radius-xl);
    background: var(--gradient-brand);
    color: var(--bg-primary);
    font-size: var(--text-md);
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    position: sticky;
    bottom: 0;
    margin-top: auto;
}

.app-generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,212,255,0.25);
}

.app-generate-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.app-generate-btn.loading {
    /* animate gradient */
    background-size: 200% 100%;
    animation: gradientShift 1.5s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}


/* ─── Main Content Area ─── */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.app-topbar {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
}

.app-project-name {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.app-project-badge {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    background: rgba(0,212,255,0.1);
    color: var(--brand-primary);
    font-weight: 600;
}

.app-topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}


/* ─── Pipeline Progress Bar ─── */
.app-pipeline-bar {
    display: none;
    padding: var(--space-3) var(--space-6);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.app-pipeline-bar.active {
    display: block;
}

.app-pipeline-steps {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.app-pipe-step {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    transition: all 0.3s ease;
}

.app-pipe-step.active {
    color: var(--brand-primary);
    background: rgba(0,212,255,0.08);
}

.app-pipe-step.done {
    color: var(--success);
}

.app-pipe-step-icon {
    font-size: 14px;
}

.app-pipe-step-label {
    font-weight: 500;
    white-space: nowrap;
}

.app-pipe-connector {
    width: 20px;
    height: 2px;
    background: var(--border-primary);
    border-radius: 1px;
    flex-shrink: 0;
}

.app-pipe-step.done + .app-pipe-connector {
    background: var(--success);
}

.app-pipeline-status {
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-align: center;
}


/* ─── Canvas / Workspace ─── */
.app-workspace {
    flex: 1;
    padding: var(--space-8);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Empty State */
.app-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    padding: var(--space-12);
    max-width: 480px;
    margin: 0 auto;
}

.app-empty-icon {
    font-size: 64px;
    margin-bottom: var(--space-6);
    filter: grayscale(30%);
}

.app-empty-title {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.app-empty-desc {
    font-size: var(--text-md);
    color: var(--text-tertiary);
    line-height: 1.7;
}

/* Results Grid */
.app-results {
    width: 100%;
    max-width: 1200px;
}

.app-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.app-results-title {
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--text-primary);
}

.app-results-subtitle {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

.app-results-actions {
    display: flex;
    gap: var(--space-3);
}

.app-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

/* Design Card */
.design-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.3s ease;
}

.design-card:hover {
    border-color: var(--brand-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}

.design-card-image {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.design-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.design-card-image-placeholder {
    font-size: 48px;
    opacity: 0.3;
}

.design-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(5,5,16,0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.design-card:hover .design-card-overlay {
    opacity: 1;
}

.design-card-body {
    padding: var(--space-4);
}

.design-card-platform {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.design-card-platform-icon {
    font-size: 16px;
}

.design-card-specs {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.design-card-spec {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* Copy Section inside card */
.design-card-copy {
    padding: var(--space-4);
    border-top: 1px solid var(--border-subtle);
}

.design-card-caption {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-2);
    max-height: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.design-card-hashtags {
    font-size: var(--text-xs);
    color: var(--brand-primary);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.design-card-actions {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--border-subtle);
}

.design-card-action {
    flex: 1;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-primary);
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    font-family: inherit;
}

.design-card-action:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    background: rgba(0,212,255,0.05);
}

.design-card-action.primary {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: var(--bg-primary);
}

.design-card-action.primary:hover {
    background: var(--brand-hover);
}


/* ─── Toast Notifications ─── */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    color: var(--text-primary);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
    pointer-events: auto;
    animation: toastIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--error); }

.toast-icon { font-size: 18px; }

@keyframes toastIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}


/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .app-sidebar {
        width: 280px;
        min-width: 280px;
    }
}

@media (max-width: 768px) {
    .app-layout {
        flex-direction: column;
    }

    .app-sidebar {
        width: 100%;
        min-width: 100%;
        max-height: none;
        border-left: none;
        border-bottom: 1px solid var(--border-primary);
    }

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

    .app-topbar {
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }

    .app-pipeline-steps {
        overflow-x: auto;
    }

    .app-pipe-step-label {
        display: none;
    }
}