:root {
    --bg-deep: #0a0c10;
    --bg-panel: #141820;
    --bg-glass: rgba(20, 24, 32, 0.7);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);

    --text-main: #f0f6fc;
    --text-muted: #8b949e;

    --accent: #f78166;
    /* Git Coral Rebase color */
    --secondary: #58a6ff;
    /* Git Blue */
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;

    --font-sans: 'Outfit', system-ui, sans-serif;
    --font-mono: 'Fira Code', monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-deep);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    background-image:
        radial-gradient(circle at top right, rgba(88, 166, 255, 0.1), transparent 40%),
        radial-gradient(circle at bottom left, rgba(247, 129, 102, 0.1), transparent 40%);
}

.text-accent {
    color: var(--accent);
}

.text-secondary {
    color: var(--secondary);
}

.text-success {
    color: var(--success);
}

.text-warning {
    color: var(--warning);
}

.text-danger {
    color: var(--danger);
}

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

.hidden {
    display: none !important;
}

/* Layout */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 1600px;
    margin: 0 auto;
}

.header {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-light);
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.header p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.workspace {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Graph Panel */
.graph-panel {
    flex: 3;
    position: relative;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-light);
}

.panel-header {
    padding: 1rem 2rem;
    background: linear-gradient(to bottom, var(--bg-panel), transparent);
    position: absolute;
    top: 0;
    width: 100%;
    z-index: 10;
}

.panel-header h2 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    /* background grid */
    background-image:
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center bottom;
}

/* Axes */
.axis-line {
    position: absolute;
    bottom: 0px;
    width: 2px;
    height: 100%;
    z-index: 1;
}

.axis-main {
    left: 30%;
    background: linear-gradient(to top, var(--secondary) 60%, transparent);
}

.axis-feature {
    left: 60%;
    background: linear-gradient(to top, var(--accent) 60%, transparent);
}

.branch-label {
    position: absolute;
    top: 40px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    transform: translateX(-50%);
    z-index: 2;
}

.label-main {
    left: 30%;
    color: var(--secondary);
    border-color: var(--secondary);
}

.label-feature {
    left: 60%;
    color: var(--accent);
    border-color: var(--accent);
}

/* Commit Nodes */
.commit-node {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
    z-index: 5;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    transform: translate(-50%, 50%);
    /* Anchor to bottom center */
    transition: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    /* bouncy physics */
    cursor: pointer;
}

.commit-node::after {
    content: attr(data-msg);
    position: absolute;
    left: 60px;
    width: max-content;
    background: var(--bg-panel);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-light);
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.8;
    pointer-events: none;
    transition: opacity 0.2s;
}

.commit-node:hover::after {
    opacity: 1;
}

.commit-node.dragged {
    z-index: 10;
    transition: none;
    filter: brightness(1.2);
}

.branch-main {
    background: radial-gradient(circle at 30% 30%, #a4cdff, var(--secondary));
    border: 2px solid #a4cdff;
}

.branch-feat {
    background: radial-gradient(circle at 30% 30%, #ffa594, var(--accent));
    border: 2px solid #ffa594;
}

.commit-node.squashed {
    opacity: 0;
    transform: translate(-50%, 50%) scale(0.1);
    pointer-events: none;
}

.commit-node.dropped {
    opacity: 0;
    transform: translate(-50%, 150%) scale(0.5) rotate(45deg);
    pointer-events: none;
}

.commit-node.reworded::after {
    content: "✏️ " attr(data-msg);
    color: var(--warning);
    border-color: var(--warning);
}

/* Side Panel */
.side-panel {
    flex: 2;
    min-width: 400px;
    background: var(--bg-panel);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Window Mac-like styling */
.window {
    background: var(--bg-deep);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.window-bar {
    background: #1e222a;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    border-bottom: 1px solid var(--border-light);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red {
    background: #ff5f56;
}

.dot.yellow {
    background: #ffbd2e;
}

.dot.green {
    background: #27c93f;
}

.window-title {
    flex: 1;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.window-content {
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    overflow-y: auto;
}

/* Terminal */
.terminal-window {
    flex: 1;
}

.term-line {
    margin-bottom: 0.5rem;
    line-height: 1.4;
    color: #d4d4d4;
}

.prompt {
    color: var(--success);
    font-weight: bold;
    margin-right: 0.5rem;
}

.cli-input {
    background: transparent;
    border: none;
    color: white;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    outline: none;
    width: calc(100% - 30px);
}

/* Editor */
.editor-window {
    flex: 2;
    border: 1px solid var(--accent);
}

.todo-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.todo-select {
    background: var(--bg-panel);
    color: var(--accent);
    border: 1px solid var(--border-light);
    padding: 0.25rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-weight: bold;
    cursor: pointer;
    outline: none;
}

.todo-hash {
    color: var(--warning);
}

.todo-msg-input {
    background: transparent;
    border: 1px dashed transparent;
    color: var(--text-main);
    font-family: var(--font-mono);
    flex: 1;
    padding: 0.25rem;
}

.todo-msg-input:focus,
.todo-msg-input.editing {
    border-color: var(--border-light);
    background: rgba(255, 255, 255, 0.05);
    outline: none;
}

.editor-help {
    color: var(--secondary);
    opacity: 0.7;
    font-size: 0.8rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    border-top: 1px dashed var(--border-light);
    padding-top: 1rem;
}

.editor-actions {
    padding: 1rem;
    background: #1e222a;
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--success);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.btn-danger {
    background: var(--bg-panel);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-danger:hover {
    background: rgba(248, 81, 73, 0.1);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-main);
}

.btn-outline:hover {
    background: var(--bg-panel);
    border-color: var(--text-main);
}