/*
Theme Name: AI Agent Builder
Theme URI: https://example.com/ai-agent-builder
Author: AI Agent Builder Team
Author URI: https://example.com
Description: Lightweight and powerful AI Agent Builder Theme. Works with AI Agent Builder Core Plugin. Optimized for Shared Hosting. Provides Chat UI, Progress Tracking, File Upload and WordPress Playground integration.
Version: 1.5.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ai-agent-builder
Tags: ai, chat, agent, builder, custom, lightweight
*/

/* =====================================================
   CSS Variables - Easy Theme Customization
   ===================================================== */
/* Default = Dark mode */
:root,
html.aab-dark,
body.aab-theme-dark {
    --aab-primary: #3b82f6;
    --aab-primary-hover: #60a5fa;
    --aab-secondary: #f1f5f9;
    --aab-success: #22c55e;
    --aab-warning: #f59e0b;
    --aab-danger: #ef4444;
    --aab-bg: #0b1220;
    --aab-surface: #111827;
    --aab-border: #1f2a3d;
    --aab-text: #e2e8f0;
    --aab-text-muted: #94a3b8;
    --aab-radius: 12px;
    --aab-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.35), 0 2px 4px -2px rgb(0 0 0 / 0.25);
    --aab-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --aab-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --aab-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
    --aab-code-bg: #0f172a;
    color-scheme: dark;
}

/* Light mode overrides */
html.aab-light,
body.aab-theme-light {
    --aab-primary: #2563eb;
    --aab-primary-hover: #1d4ed8;
    --aab-secondary: #0f172a;
    --aab-success: #16a34a;
    --aab-warning: #d97706;
    --aab-danger: #dc2626;
    --aab-bg: #f8fafc;
    --aab-surface: #ffffff;
    --aab-border: #e2e8f0;
    --aab-text: #1e293b;
    --aab-text-muted: #64748b;
    --aab-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --aab-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
    --aab-code-bg: #0f172a;
    color-scheme: light;
}

/* Theme toggle icons */
html.aab-dark .aab-icon-moon,
html:not(.aab-light) .aab-icon-moon { display: none; }
html.aab-dark .aab-icon-sun,
html:not(.aab-light) .aab-icon-sun { display: block; }

html.aab-light .aab-icon-sun { display: none; }
html.aab-light .aab-icon-moon { display: block; }

/* Dark mode fine-tuning */
html.aab-dark .aab-message.assistant .aab-bubble,
body.aab-theme-dark .aab-message.assistant .aab-bubble {
    background: var(--aab-surface);
    border-color: var(--aab-border);
}

html.aab-dark .aab-bubble pre,
body.aab-theme-dark .aab-bubble pre {
    background: var(--aab-code-bg);
}

html.aab-dark .aab-chat-item.active,
body.aab-theme-dark .aab-chat-item.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--aab-primary);
}

html.aab-dark .aab-suggestion:hover,
body.aab-theme-dark .aab-suggestion:hover {
    background: rgba(59, 130, 246, 0.12);
    border-color: var(--aab-primary);
}

html.aab-dark .aab-progress-bar-track,
body.aab-theme-dark .aab-progress-bar-track {
    background: #1e293b;
}

html.aab-dark .aab-input-wrapper:focus-within,
body.aab-theme-dark .aab-input-wrapper:focus-within {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* =====================================================
   Reset & Base
   ===================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--aab-font);
    background: var(--aab-bg);
    color: var(--aab-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--aab-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--aab-primary-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* =====================================================
   Utility Classes
   ===================================================== */
.aab-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.aab-flex {
    display: flex;
}

.aab-flex-col {
    flex-direction: column;
}

.aab-items-center {
    align-items: center;
}

.aab-justify-between {
    justify-content: space-between;
}

.aab-gap-2 {
    gap: 0.5rem;
}

.aab-gap-3 {
    gap: 0.75rem;
}

.aab-gap-4 {
    gap: 1rem;
}

.aab-hidden {
    display: none !important;
}

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

/* =====================================================
   Header / Top Bar
   ===================================================== */
.aab-header {
    background: var(--aab-surface);
    border-bottom: 1px solid var(--aab-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--aab-shadow);
}

.aab-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.aab-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--aab-secondary);
}

.aab-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--aab-primary), #7c3aed);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
}

.aab-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* =====================================================
   Buttons
   ===================================================== */
.aab-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.15rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.4;
}

.aab-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.aab-btn-primary {
    background: var(--aab-primary);
    color: white;
}

.aab-btn-primary:hover:not(:disabled) {
    background: var(--aab-primary-hover);
}

.aab-btn-secondary {
    background: var(--aab-bg);
    color: var(--aab-text);
    border: 1px solid var(--aab-border);
}

.aab-btn-secondary:hover:not(:disabled) {
    background: #f1f5f9;
}

.aab-btn-ghost {
    background: transparent;
    color: var(--aab-text-muted);
}

.aab-btn-ghost:hover:not(:disabled) {
    background: var(--aab-bg);
    color: var(--aab-text);
}

.aab-btn-sm {
    padding: 0.4rem 0.85rem;
    font-size: 0.82rem;
}

.aab-btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 8px;
}

/* =====================================================
   Main Layout - Chat App Style
   ===================================================== */
.aab-app {
    display: flex;
    height: calc(100vh - 64px);
    max-width: 1400px;
    margin: 0 auto;
    background: var(--aab-bg);
}

/* Sidebar */
.aab-sidebar {
    width: 280px;
    background: var(--aab-surface);
    border-right: 1px solid var(--aab-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.aab-sidebar-header {
    padding: 1rem 1.15rem;
    border-bottom: 1px solid var(--aab-border);
}

.aab-sidebar-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--aab-text-muted);
    margin-bottom: 0.75rem;
}

.aab-new-chat-btn {
    width: 100%;
}

.aab-chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
}

.aab-chat-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 0.85rem;
    border-radius: 8px;
    cursor: pointer;
    color: var(--aab-text);
    font-size: 0.9rem;
    transition: background 0.15s ease;
    margin-bottom: 0.25rem;
}

.aab-chat-item:hover {
    background: var(--aab-bg);
}

.aab-chat-item.active {
    background: #eff6ff;
    color: var(--aab-primary);
    font-weight: 500;
}

.aab-sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--aab-border);
    font-size: 0.8rem;
    color: var(--aab-text-muted);
}

/* Main Chat Area */
.aab-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--aab-bg);
}

.aab-chat-header {
    padding: 0.85rem 1.5rem;
    background: var(--aab-surface);
    border-bottom: 1px solid var(--aab-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.aab-chat-title {
    font-weight: 600;
    font-size: 1rem;
}

.aab-chat-status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--aab-text-muted);
}

.aab-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--aab-success);
}

.aab-status-dot.busy {
    background: var(--aab-warning);
    animation: pulse 1.2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Messages Area */
.aab-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.aab-message {
    display: flex;
    gap: 0.85rem;
    max-width: 85%;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.aab-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.aab-message.assistant {
    align-self: flex-start;
}

.aab-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.95rem;
    font-weight: 600;
}

.aab-message.user .aab-avatar {
    background: var(--aab-primary);
    color: white;
}

.aab-message.assistant .aab-avatar {
    background: linear-gradient(135deg, #7c3aed, #2563eb);
    color: white;
}

.aab-bubble {
    padding: 0.85rem 1.1rem;
    border-radius: 14px;
    font-size: 0.95rem;
    line-height: 1.55;
    position: relative;
}

.aab-message.user .aab-bubble {
    background: var(--aab-primary);
    color: white;
    border-bottom-right-radius: 4px;
}

.aab-message.assistant .aab-bubble {
    background: var(--aab-surface);
    border: 1px solid var(--aab-border);
    border-bottom-left-radius: 4px;
    box-shadow: var(--aab-shadow);
}

.aab-bubble p {
    margin-bottom: 0.6rem;
}

.aab-bubble p:last-child {
    margin-bottom: 0;
}

.aab-bubble code {
    font-family: var(--aab-mono);
    font-size: 0.85em;
    background: rgba(0,0,0,0.06);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

.aab-message.user .aab-bubble code {
    background: rgba(255,255,255,0.2);
}

.aab-bubble pre {
    background: #0f172a;
    color: #e2e8f0;
    padding: 0.9rem 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.6rem 0;
    font-size: 0.82rem;
    line-height: 1.5;
}

.aab-bubble pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* Progress / Stepper */
.aab-progress-card {
    background: var(--aab-surface);
    border: 1px solid var(--aab-border);
    border-radius: var(--aab-radius);
    padding: 1.15rem;
    margin: 0.5rem 0;
    box-shadow: var(--aab-shadow);
}

.aab-progress-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.85rem;
}

.aab-progress-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.aab-progress-percent {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--aab-primary);
}

.aab-progress-bar-track {
    height: 8px;
    background: var(--aab-bg);
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.aab-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--aab-primary), #7c3aed);
    border-radius: 99px;
    transition: width 0.4s ease;
    width: 0%;
}

.aab-steps {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.aab-step {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.85rem;
    color: var(--aab-text-muted);
}

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

.aab-step.active {
    color: var(--aab-primary);
    font-weight: 500;
}

.aab-step-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    flex-shrink: 0;
}

.aab-step.done .aab-step-icon {
    background: var(--aab-success);
    color: white;
}

.aab-step.active .aab-step-icon {
    background: var(--aab-primary);
    color: white;
}

.aab-step.pending .aab-step-icon {
    background: var(--aab-bg);
    border: 1.5px solid var(--aab-border);
    color: var(--aab-text-muted);
}

/* Input Area */
.aab-input-area {
    padding: 1rem 1.5rem 1.35rem;
    background: var(--aab-surface);
    border-top: 1px solid var(--aab-border);
}

.aab-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    background: var(--aab-bg);
    border: 1px solid var(--aab-border);
    border-radius: 14px;
    padding: 0.75rem 0.9rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.aab-input-wrapper:focus-within {
    border-color: var(--aab-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.aab-textarea {
    width: 100%;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    min-height: 48px;
    max-height: 160px;
    line-height: 1.5;
    color: var(--aab-text);
}

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

.aab-input-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.aab-input-left {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.aab-input-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.aab-file-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.aab-file-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--aab-surface);
    border: 1px solid var(--aab-border);
    border-radius: 8px;
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
    color: var(--aab-text);
}

.aab-file-chip button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--aab-text-muted);
    padding: 0;
    display: flex;
    line-height: 1;
}

.aab-file-chip button:hover {
    color: var(--aab-danger);
}

/* File Upload Button */
.aab-upload-btn {
    position: relative;
    overflow: hidden;
}

.aab-upload-btn input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

/* Welcome Screen */
.aab-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
}

.aab-welcome-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--aab-primary), #7c3aed);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--aab-shadow-lg);
}

.aab-welcome h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--aab-secondary);
}

.aab-welcome p {
    color: var(--aab-text-muted);
    max-width: 420px;
    margin-bottom: 1.75rem;
    font-size: 1rem;
}

.aab-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: center;
    max-width: 560px;
}

.aab-suggestion {
    background: var(--aab-surface);
    border: 1px solid var(--aab-border);
    border-radius: 99px;
    padding: 0.55rem 1.1rem;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--aab-text);
}

.aab-suggestion:hover {
    border-color: var(--aab-primary);
    color: var(--aab-primary);
    background: #eff6ff;
}

/* Playground Panel */
.aab-playground-panel {
    width: 420px;
    background: var(--aab-surface);
    border-left: 1px solid var(--aab-border);
    display: none;
    flex-direction: column;
    flex-shrink: 0;
}

.aab-playground-panel.open {
    display: flex;
}

.aab-playground-header {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--aab-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.aab-playground-iframe-wrap {
    flex: 1;
    position: relative;
    background: #0f172a;
}

.aab-playground-iframe-wrap iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Empty / Loading states */
.aab-typing {
    display: flex;
    gap: 4px;
    padding: 0.5rem 0;
}

.aab-typing span {
    width: 7px;
    height: 7px;
    background: var(--aab-text-muted);
    border-radius: 50%;
    animation: bounce 1.2s infinite ease-in-out;
}

.aab-typing span:nth-child(2) { animation-delay: 0.15s; }
.aab-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0.7); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* Responsive */
@media (max-width: 1024px) {
    .aab-sidebar {
        width: 240px;
    }
    .aab-playground-panel {
        width: 360px;
    }
}

@media (max-width: 768px) {
    .aab-sidebar {
        position: fixed;
        left: -280px;
        top: 64px;
        bottom: 0;
        z-index: 90;
        transition: left 0.25s ease;
        width: 280px;
    }
    .aab-sidebar.open {
        left: 0;
        box-shadow: var(--aab-shadow-lg);
    }
    .aab-playground-panel {
        position: fixed;
        right: -100%;
        top: 64px;
        bottom: 0;
        width: 100%;
        z-index: 95;
        transition: right 0.25s ease;
    }
    .aab-playground-panel.open {
        right: 0;
    }
    .aab-message {
        max-width: 92%;
    }
    .aab-header-inner {
        padding: 0 1rem;
    }
}

/* Scrollbar */
.aab-messages::-webkit-scrollbar,
.aab-chat-history::-webkit-scrollbar {
    width: 6px;
}
.aab-messages::-webkit-scrollbar-track,
.aab-chat-history::-webkit-scrollbar-track {
    background: transparent;
}
.aab-messages::-webkit-scrollbar-thumb,
.aab-chat-history::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 99px;
}
.aab-messages::-webkit-scrollbar-thumb:hover,
.aab-chat-history::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* API Status Widget (Frontend – no secrets) */
.aab-api-status {
    background: var(--aab-bg);
    border: 1px solid var(--aab-border);
    border-radius: 10px;
    padding: 0.7rem 0.8rem;
}

.aab-api-status-title {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--aab-text-muted);
    margin-bottom: 0.5rem;
}

.aab-api-provider {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    padding: 0.25rem 0;
}

.aab-api-provider-name {
    font-weight: 500;
    color: var(--aab-text);
}

.aab-api-dots {
    display: flex;
    gap: 4px;
    align-items: center;
}

.aab-api-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #cbd5e1;
}

.aab-api-dot.active { background: #16a34a; }
.aab-api-dot.idle { background: #94a3b8; }
.aab-api-dot.cooling { background: #d97706; animation: pulse 1.2s infinite; }
.aab-api-dot.error { background: #dc2626; }

.aab-api-summary {
    font-size: 0.72rem;
    color: var(--aab-text-muted);
    margin-top: 0.4rem;
    padding-top: 0.4rem;
    border-top: 1px solid var(--aab-border);
}

.aab-api-loading {
    font-size: 0.78rem;
    color: var(--aab-text-muted);
}