/* Free.ai Coder — Dark IDE Theme */
:root {
    --coder-bg: #0d1117;
    --coder-sidebar: #161b22;
    --coder-panel: #161b22;
    --coder-border: #30363d;
    --coder-text: #e6edf3;
    --coder-text-muted: #8b949e;
    --coder-accent: #16A34A;
    --coder-accent-hover: #15803d;
    --coder-input-bg: #0d1117;
    --coder-msg-user: #1c2633;
    --coder-msg-ai: #161b22;
    --coder-diff-add: rgba(63,185,80,.15);
    --coder-diff-del: rgba(248,81,73,.15);
    --coder-diff-add-text: #3fb950;
    --coder-diff-del-text: #f85149;
    --coder-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

/* Full-page layout */
.coder-wrap {
    display: flex;
    height: calc(100vh - 56px);
    overflow: hidden;
    background: var(--coder-bg);
    color: var(--coder-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== TOP BAR ===== */
.coder-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    min-height: 48px;
    padding: 0 16px;
    background: var(--coder-sidebar);
    border-bottom: 1px solid var(--coder-border);
    z-index: 10;
}
.coder-topbar .logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--coder-text);
    text-decoration: none;
    letter-spacing: -0.5px;
}
.coder-topbar .logo span { color: var(--coder-accent); }
.coder-topbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}
.coder-topbar-actions .btn-coder {
    padding: 4px 12px;
    font-size: .78rem;
    border-radius: 6px;
    border: 1px solid var(--coder-border);
    background: transparent;
    color: var(--coder-text-muted);
    cursor: pointer;
    transition: all .15s;
}
.coder-topbar-actions .btn-coder:hover {
    background: var(--coder-border);
    color: var(--coder-text);
}
.coder-topbar-actions .btn-coder.accent {
    background: var(--coder-accent);
    color: #fff;
    border-color: var(--coder-accent);
}
.coder-topbar-actions .btn-coder.accent:hover {
    background: var(--coder-accent-hover);
}

/* ===== LEFT SIDEBAR — File Tree ===== */
.coder-sidebar {
    width: 250px;
    min-width: 250px;
    background: var(--coder-sidebar);
    border-right: 1px solid var(--coder-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width .2s, min-width .2s;
}
.coder-sidebar.collapsed {
    width: 0;
    min-width: 0;
    border-right: none;
}
.coder-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-bottom: 1px solid var(--coder-border);
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--coder-text-muted);
}
.coder-sidebar-header button {
    background: none;
    border: none;
    color: var(--coder-text-muted);
    cursor: pointer;
    padding: 2px;
    font-size: .9rem;
}
.coder-sidebar-header button:hover { color: var(--coder-text); }

.coder-file-tree {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--coder-border) transparent;
}
.coder-file-tree::-webkit-scrollbar { width: 6px; }
.coder-file-tree::-webkit-scrollbar-thumb { background: var(--coder-border); border-radius: 3px; }

.coder-tree-item {
    display: flex;
    align-items: center;
    padding: 3px 12px;
    cursor: pointer;
    font-size: .8rem;
    color: var(--coder-text);
    transition: background .1s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    user-select: none;
}
.coder-tree-item:hover { background: rgba(255,255,255,.04); }
.coder-tree-item.active { background: rgba(22,163,74,.15); color: var(--coder-accent); }
.coder-tree-item .icon { width: 16px; margin-right: 6px; text-align: center; font-size: .75rem; color: var(--coder-text-muted); }
.coder-tree-item .icon.folder { color: #e3b341; }
.coder-tree-item .icon.file-py { color: #3572A5; }
.coder-tree-item .icon.file-js { color: #f1e05a; }
.coder-tree-item .icon.file-ts { color: #3178c6; }
.coder-tree-item .icon.file-html { color: #e34c26; }
.coder-tree-item .icon.file-css { color: #563d7c; }
.coder-tree-item .icon.file-json { color: #f1e05a; }
.coder-tree-item .children { display: none; }
.coder-tree-item.open > .children { display: block; }

.coder-sidebar-actions {
    padding: 8px 12px;
    border-top: 1px solid var(--coder-border);
    display: flex;
    gap: 6px;
}
.coder-sidebar-actions button {
    flex: 1;
    padding: 5px 8px;
    font-size: .72rem;
    border-radius: 5px;
    border: 1px solid var(--coder-border);
    background: transparent;
    color: var(--coder-text-muted);
    cursor: pointer;
    transition: all .15s;
}
.coder-sidebar-actions button:hover {
    background: var(--coder-border);
    color: var(--coder-text);
}

/* Drop zone */
.coder-dropzone {
    margin: 8px 12px;
    padding: 16px;
    border: 2px dashed var(--coder-border);
    border-radius: 8px;
    text-align: center;
    font-size: .75rem;
    color: var(--coder-text-muted);
    transition: all .2s;
    cursor: pointer;
}
.coder-dropzone.dragover {
    border-color: var(--coder-accent);
    background: rgba(22,163,74,.08);
    color: var(--coder-accent);
}

/* GitHub clone input */
.coder-clone-input {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
}
.coder-clone-input input {
    flex: 1;
    padding: 4px 8px;
    font-size: .75rem;
    border-radius: 5px;
    border: 1px solid var(--coder-border);
    background: var(--coder-input-bg);
    color: var(--coder-text);
    outline: none;
}
.coder-clone-input input:focus { border-color: var(--coder-accent); }
.coder-clone-input button {
    padding: 4px 10px;
    font-size: .72rem;
    border-radius: 5px;
    border: 1px solid var(--coder-accent);
    background: var(--coder-accent);
    color: #fff;
    cursor: pointer;
}

/* ===== MAIN CENTER AREA ===== */
.coder-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Model selector bar */
.coder-model-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--coder-border);
    background: var(--coder-sidebar);
    font-size: .8rem;
}
.coder-model-bar select {
    padding: 4px 28px 4px 10px;
    font-size: .78rem;
    border-radius: 6px;
    border: 1px solid var(--coder-border);
    background: var(--coder-input-bg);
    color: var(--coder-text);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238b949e'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
}
.coder-model-bar select:focus { border-color: var(--coder-accent); }
.coder-model-bar .model-cost {
    color: var(--coder-text-muted);
    font-size: .72rem;
}
.coder-model-bar .safe-mode {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .75rem;
    color: var(--coder-text-muted);
}
.coder-model-bar .safe-mode input[type="checkbox"] {
    accent-color: var(--coder-accent);
}

/* ===== CHAT PANEL ===== */
.coder-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 16px;
    scrollbar-width: thin;
    scrollbar-color: var(--coder-border) transparent;
}
.coder-chat::-webkit-scrollbar { width: 6px; }
.coder-chat::-webkit-scrollbar-thumb { background: var(--coder-border); border-radius: 3px; }

.coder-msg {
    margin-bottom: 16px;
    display: flex;
    gap: 10px;
    animation: msgFadeIn .3s ease;
}
@keyframes msgFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.coder-msg-avatar {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .75rem;
    font-weight: 700;
    flex-shrink: 0;
}
.coder-msg.user .coder-msg-avatar {
    background: #1f6feb;
    color: #fff;
}
.coder-msg.assistant .coder-msg-avatar {
    background: var(--coder-accent);
    color: #fff;
}
.coder-msg-body {
    flex: 1;
    min-width: 0;
}
.coder-msg-body p { margin: 0 0 8px; line-height: 1.6; font-size: .88rem; }
.coder-msg-body p:last-child { margin-bottom: 0; }

/* Code blocks in chat */
.coder-msg-body pre {
    background: #0d1117;
    border: 1px solid var(--coder-border);
    border-radius: 8px;
    padding: 12px 16px;
    margin: 8px 0;
    overflow-x: auto;
    font-family: var(--coder-mono);
    font-size: .82rem;
    line-height: 1.55;
    position: relative;
}
.coder-msg-body pre .copy-code-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    padding: 2px 8px;
    font-size: .68rem;
    border-radius: 4px;
    border: 1px solid var(--coder-border);
    background: var(--coder-sidebar);
    color: var(--coder-text-muted);
    cursor: pointer;
    opacity: 0;
    transition: opacity .15s;
}
.coder-msg-body pre:hover .copy-code-btn { opacity: 1; }
.coder-msg-body pre .copy-code-btn:hover { color: var(--coder-text); background: var(--coder-border); }

.coder-msg-body code {
    font-family: var(--coder-mono);
    font-size: .82rem;
}
.coder-msg-body p > code {
    background: rgba(110,118,129,.2);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .8rem;
}

/* Thinking indicator */
.coder-thinking {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: var(--coder-text-muted);
    font-size: .82rem;
    animation: thinkPulse 1.5s ease-in-out infinite;
}
@keyframes thinkPulse {
    0%, 100% { opacity: .5; }
    50% { opacity: 1; }
}
.coder-thinking .dots span {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--coder-accent);
    margin: 0 2px;
    animation: dotBounce .6s ease infinite;
}
.coder-thinking .dots span:nth-child(2) { animation-delay: .2s; }
.coder-thinking .dots span:nth-child(3) { animation-delay: .4s; }
@keyframes dotBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.coder-step-progress {
    font-size: .72rem;
    color: var(--coder-text-muted);
    padding: 2px 16px 8px 54px;
}

/* ===== INPUT AREA ===== */
.coder-input-area {
    padding: 12px 16px;
    border-top: 1px solid var(--coder-border);
    background: var(--coder-sidebar);
}
.coder-input-row {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}
.coder-input-row textarea {
    flex: 1;
    padding: 10px 14px;
    font-size: .88rem;
    font-family: inherit;
    border-radius: 10px;
    border: 1px solid var(--coder-border);
    background: var(--coder-input-bg);
    color: var(--coder-text);
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 200px;
    min-height: 42px;
    transition: border-color .15s;
}
.coder-input-row textarea:focus { border-color: var(--coder-accent); }
.coder-input-row textarea::placeholder { color: var(--coder-text-muted); }

.coder-input-actions {
    display: flex;
    gap: 6px;
}
.coder-send-btn {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: none;
    background: var(--coder-accent);
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .15s;
}
.coder-send-btn:hover { background: var(--coder-accent-hover); }
.coder-send-btn:disabled { opacity: .4; cursor: not-allowed; }

.coder-attach-btn {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--coder-border);
    background: transparent;
    color: var(--coder-text-muted);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .15s;
}
.coder-attach-btn:hover { background: var(--coder-border); color: var(--coder-text); }

.coder-input-hint {
    font-size: .68rem;
    color: var(--coder-text-muted);
    margin-top: 4px;
    text-align: center;
}

/* ===== RIGHT PANEL ===== */
.coder-right-panel {
    width: 400px;
    min-width: 400px;
    background: var(--coder-sidebar);
    border-left: 1px solid var(--coder-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width .2s, min-width .2s;
}
.coder-right-panel.collapsed {
    width: 0;
    min-width: 0;
    border-left: none;
}

.coder-right-tabs {
    display: flex;
    border-bottom: 1px solid var(--coder-border);
}
.coder-right-tab {
    flex: 1;
    padding: 8px;
    text-align: center;
    font-size: .76rem;
    font-weight: 600;
    color: var(--coder-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all .15s;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}
.coder-right-tab:hover { color: var(--coder-text); }
.coder-right-tab.active {
    color: var(--coder-accent);
    border-bottom-color: var(--coder-accent);
}

.coder-right-content {
    flex: 1;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--coder-border) transparent;
}

/* Diff viewer */
.coder-diff-file {
    border-bottom: 1px solid var(--coder-border);
}
.coder-diff-file-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: rgba(22,163,74,.06);
    font-size: .78rem;
    font-weight: 600;
    font-family: var(--coder-mono);
}
.coder-diff-file-header .actions {
    display: flex;
    gap: 4px;
}
.coder-diff-file-header .actions button {
    padding: 2px 10px;
    font-size: .7rem;
    border-radius: 4px;
    border: 1px solid var(--coder-border);
    background: transparent;
    color: var(--coder-text-muted);
    cursor: pointer;
    transition: all .15s;
}
.coder-diff-file-header .actions .approve:hover {
    background: rgba(63,185,80,.15);
    border-color: var(--coder-diff-add-text);
    color: var(--coder-diff-add-text);
}
.coder-diff-file-header .actions .reject:hover {
    background: rgba(248,81,73,.15);
    border-color: var(--coder-diff-del-text);
    color: var(--coder-diff-del-text);
}

.coder-diff-lines {
    font-family: var(--coder-mono);
    font-size: .78rem;
    line-height: 1.6;
    overflow-x: auto;
}
.coder-diff-line {
    display: flex;
    padding: 0 12px;
    min-height: 22px;
}
.coder-diff-line .line-num {
    width: 40px;
    text-align: right;
    padding-right: 12px;
    color: var(--coder-text-muted);
    user-select: none;
    flex-shrink: 0;
    font-size: .72rem;
}
.coder-diff-line .line-content {
    flex: 1;
    white-space: pre;
    min-width: 0;
}
.coder-diff-line.add { background: var(--coder-diff-add); }
.coder-diff-line.add .line-content { color: var(--coder-diff-add-text); }
.coder-diff-line.del { background: var(--coder-diff-del); }
.coder-diff-line.del .line-content { color: var(--coder-diff-del-text); }
.coder-diff-line.ctx .line-content { color: var(--coder-text-muted); }

/* Terminal */
.coder-terminal-wrap {
    flex: 1;
    padding: 0;
    background: #000;
    display: none;
}
.coder-terminal-wrap.active { display: flex; flex-direction: column; }
.coder-terminal-container {
    flex: 1;
    padding: 8px;
    font-family: var(--coder-mono);
    font-size: .8rem;
    color: #d4d4d4;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Output tab */
.coder-output-wrap {
    flex: 1;
    padding: 12px;
    display: none;
    overflow-y: auto;
}
.coder-output-wrap.active { display: block; }
.coder-output-wrap pre {
    font-family: var(--coder-mono);
    font-size: .8rem;
    color: var(--coder-text);
    white-space: pre-wrap;
    margin: 0;
}

/* Changes tab */
.coder-changes-wrap {
    flex: 1;
    display: none;
    overflow-y: auto;
}
.coder-changes-wrap.active { display: block; }

/* ===== BOTTOM TERMINAL (resizable) ===== */
.coder-bottom-terminal {
    height: 200px;
    min-height: 100px;
    max-height: 50vh;
    background: #000;
    border-top: 1px solid var(--coder-border);
    display: none;
    flex-direction: column;
    position: relative;
}
.coder-bottom-terminal.open { display: flex; }
.coder-bottom-terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 12px;
    background: var(--coder-sidebar);
    border-bottom: 1px solid var(--coder-border);
    font-size: .75rem;
    font-weight: 600;
    color: var(--coder-text-muted);
}
.coder-bottom-terminal-header button {
    background: none;
    border: none;
    color: var(--coder-text-muted);
    cursor: pointer;
    font-size: .85rem;
}
.coder-bottom-terminal-header button:hover { color: var(--coder-text); }
.coder-bottom-terminal-content {
    flex: 1;
    padding: 8px 12px;
    font-family: var(--coder-mono);
    font-size: .8rem;
    color: #d4d4d4;
    overflow-y: auto;
    white-space: pre-wrap;
}
.coder-resize-handle {
    position: absolute;
    top: -3px;
    left: 0;
    right: 0;
    height: 6px;
    cursor: ns-resize;
    z-index: 5;
}
.coder-resize-handle:hover { background: var(--coder-accent); opacity: .3; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .coder-sidebar { width: 0; min-width: 0; border-right: none; }
    .coder-right-panel { width: 0; min-width: 0; border-left: none; }
    .coder-bottom-terminal { display: none !important; }
}

@media (max-width: 768px) {
    .coder-topbar { padding: 0 8px; }
    .coder-chat { padding: 8px; }
    .coder-input-area { padding: 8px; }
    .coder-model-bar { padding: 6px 8px; flex-wrap: wrap; }
}

/* ===== WELCOME SCREEN ===== */
.coder-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: 300px;
    padding: 40px 20px;
    text-align: center;
}
.coder-welcome h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.coder-welcome h2 span { color: var(--coder-accent); }
.coder-welcome p {
    color: var(--coder-text-muted);
    font-size: .92rem;
    max-width: 500px;
    margin-bottom: 24px;
}
.coder-welcome-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    max-width: 480px;
    width: 100%;
}
.coder-welcome-card {
    padding: 14px 16px;
    border: 1px solid var(--coder-border);
    border-radius: 10px;
    text-align: left;
    cursor: pointer;
    transition: all .15s;
    background: transparent;
    color: var(--coder-text);
    font-family: inherit;
}
.coder-welcome-card:hover {
    border-color: var(--coder-accent);
    background: rgba(22,163,74,.05);
}
.coder-welcome-card .wc-icon { font-size: 1.2rem; margin-bottom: 4px; }
.coder-welcome-card .wc-title { font-size: .82rem; font-weight: 600; }
.coder-welcome-card .wc-desc { font-size: .72rem; color: var(--coder-text-muted); margin-top: 2px; }

/* ===== MISC ===== */
.coder-badge {
    display: inline-block;
    padding: 1px 6px;
    font-size: .62rem;
    border-radius: 3px;
    font-weight: 600;
    text-transform: uppercase;
}
.coder-badge.free { background: rgba(22,163,74,.15); color: var(--coder-accent); }
.coder-badge.pro { background: rgba(31,111,235,.15); color: #1f6feb; }

/* Session list */
.coder-sessions {
    padding: 8px 0;
    border-bottom: 1px solid var(--coder-border);
}
.coder-session-item {
    display: flex;
    align-items: center;
    padding: 5px 12px;
    font-size: .78rem;
    color: var(--coder-text-muted);
    cursor: pointer;
    transition: background .1s;
}
.coder-session-item:hover { background: rgba(255,255,255,.04); }
.coder-session-item.active { color: var(--coder-accent); background: rgba(22,163,74,.08); }
.coder-session-item .icon { margin-right: 6px; font-size: .7rem; }

/* Scrollbar for chat */
.coder-chat, .coder-right-content, .coder-file-tree {
    scrollbar-width: thin;
    scrollbar-color: var(--coder-border) transparent;
}