/* ==========================================================================
   GRIDDY CORE DESIGN SYSTEM
   ========================================================================== */

:root {
    /* Fonts */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Space Mono', "SFMono-Regular", Consolas, monospace;

    /* Transition speeds */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-norm: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout dimensions */
    --sidebar-width: 360px;
    --header-height: 56px;
    --footer-height: 32px;
}

/* Dark Theme Variables (Default) */
.dark-theme {
    --bg: #0c0c0e;
    --sidebar-bg: #121215;
    --border: #222228;
    --border-light: #2d2d35;
    --text: #e6e6eb;
    --text-muted: #828292;
    --text-dim: #484855;
    
    --accent: #ffffff;
    --accent-bg: #e6e6eb;
    --accent-text: #0c0c0e;
    
    --btn-secondary-bg: #18181f;
    --btn-secondary-hover: #22222c;
    
    --canvas-outer-bg: #08080a;
    --canvas-bg: #0e0e11;
    --canvas-border: #2c2c36;
    --grid-dot-color: rgba(255, 255, 255, 0.04);
    
    --slider-track: #222228;
    --slider-thumb: #ffffff;
    --shadow-rgb: 0, 0, 0;
}

/* Light Theme Variables */
.light-theme {
    --bg: #f9f9fa;
    --sidebar-bg: #ffffff;
    --border: #e2e2e8;
    --border-light: #d0d0d8;
    --text: #1a1a20;
    --text-muted: #646473;
    --text-dim: #9ca3af;
    
    --accent: #121215;
    --accent-bg: #121215;
    --accent-text: #ffffff;
    
    --btn-secondary-bg: #f1f1f5;
    --btn-secondary-hover: #e5e5eb;
    
    --canvas-outer-bg: #eef0f3;
    --canvas-bg: #ffffff;
    --canvas-border: #c4c4d0;
    --grid-dot-color: rgba(0, 0, 0, 0.05);
    
    --slider-track: #e2e2e8;
    --slider-thumb: #121215;
    --shadow-rgb: 18, 18, 21;
}

/* ==========================================================================
   RESET & FOUNDATIONS
   ========================================================================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-ui);
    font-size: 14px;
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
    transition: background-color var(--transition-norm), color var(--transition-norm);
}

.mono {
    font-family: var(--font-mono);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==========================================================================
   LAYOUT STRUCTURE
   ========================================================================== */

.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

/* ==========================================================================
   SIDEBAR (CONTROLS PANEL)
   ========================================================================== */

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100%;
    z-index: 10;
    box-shadow: 4px 0 24px rgba(var(--shadow-rgb), 0.05);
    transition: background-color var(--transition-norm), border-color var(--transition-norm);
}

.app-header {
    padding: 24px 24px 20px;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
}

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

.author-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 6px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.5px;
}

.author-name {
    color: var(--text);
    font-weight: 700;
}

.author-subtitle {
    color: var(--text-muted);
    border-left: 1px solid var(--border-light);
    padding-left: 8px;
}

.subtitle {
    margin-top: 10px;
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
}

.sidebar-scroll {
    flex-grow: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    font-weight: 700;
}

.group-info {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.35;
    margin-top: -4px;
}

/* ==========================================================================
   BUTTONS & INPUTS
   ========================================================================== */

.btn {
    font-family: var(--font-ui);
    font-size: 12.5px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--transition-fast);
    outline: none;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--accent-text);
    font-weight: 600;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background-color: var(--btn-secondary-hover);
    border-color: var(--border-light);
}

/* Aspect Ratio Buttons Grid */
.ratio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.btn-ratio {
    background-color: var(--btn-secondary-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    height: 72px;
    border-radius: 6px;
}

.btn-ratio:hover {
    border-color: var(--border-light);
    background-color: var(--btn-secondary-hover);
}

.btn-ratio.active {
    border-color: var(--text);
    background-color: var(--btn-secondary-hover);
    box-shadow: inset 0 0 0 1px var(--text);
}

/* Ratio Miniature Icons */
.ratio-box {
    display: block;
    border: 1px solid currentColor;
    background: transparent;
    opacity: 0.8;
}

.r-1-1 { width: 16px; height: 16px; }
.r-3-4 { width: 12px; height: 16px; }
.r-4-5 { width: 13px; height: 16px; }
.r-9-16 { width: 9px; height: 16px; }
.r-16-9 { width: 16px; height: 9px; }
.r-a4-p { width: 11.3px; height: 16px; }
.r-a4-l { width: 16px; height: 11.3px; }
.r-custom {
    width: 16px;
    height: 16px;
    border-style: dashed;
}

.ratio-label {
    font-size: 11px;
    font-weight: 500;
}

/* Custom Dimensions inputs */
.custom-dimensions-wrapper {
    margin-top: 4px;
    padding: 12px;
    background-color: var(--btn-secondary-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    animation: slideDown 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-dimensions-wrapper.hidden {
    display: none;
}

.input-pair {
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.input-field {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-field label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.input-field input {
    background-color: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 6px 10px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 12px;
    width: 100%;
    outline: none;
}

.input-field input:focus {
    border-color: var(--text-muted);
}

.input-span {
    color: var(--text-muted);
    font-size: 16px;
    padding-bottom: 4px;
}

/* ==========================================================================
   SLIDERS & LOCKS
   ========================================================================== */

.slider-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.slider-val {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: bold;
    color: var(--text);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    outline: none;
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: var(--slider-track);
    border-radius: 2px;
    border: none;
}

input[type="range"]::-webkit-slider-thumb {
    height: 14px;
    width: 14px;
    border-radius: 50%;
    background: var(--slider-thumb);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -5px;
    transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 9px;
    color: var(--text-muted);
}

/* Element Locks & Switch styling */
.locks-list, .toggles-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lock-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background-color: var(--btn-secondary-bg);
    transition: all var(--transition-fast);
}

.lock-toggle:hover {
    border-color: var(--border-light);
}

.lock-toggle input {
    display: none;
}

.toggle-track {
    width: 28px;
    height: 16px;
    background-color: var(--border-light);
    border-radius: 8px;
    position: relative;
    margin-right: 12px;
    flex-shrink: 0;
    transition: background-color var(--transition-fast);
}

.toggle-track::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--sidebar-bg);
    top: 2px;
    left: 2px;
    transition: transform var(--transition-fast);
}

.lock-toggle input:checked + .toggle-track {
    background-color: var(--text);
}

.lock-toggle input:checked + .toggle-track::after {
    transform: translateX(12px);
    background-color: var(--bg);
}

.toggle-label {
    font-size: 11.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.icon-lock {
    opacity: 0.4;
    font-size: 10px;
    transition: opacity var(--transition-fast);
}

.lock-toggle input:checked ~ .toggle-label .icon-lock {
    opacity: 1;
}

/* Styling & Segmented Control */
.style-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    margin-bottom: 6px;
}

.segmented-control {
    display: flex;
    background-color: var(--btn-secondary-bg);
    border: 1px solid var(--border);
    padding: 2px;
    border-radius: 6px;
}

.segmented-control .btn {
    padding: 4px 10px;
    font-size: 11px;
    border-radius: 4px;
    background: transparent;
    border: none;
}

.segmented-control .btn:hover {
    color: var(--text);
}

.segmented-control .btn.active {
    background-color: var(--bg);
    color: var(--text);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* ==========================================================================
   SIDEBAR FOOTER & SEED SYSTEM
   ========================================================================== */

.sidebar-footer {
    padding: 20px 24px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 16px;
    background-color: var(--sidebar-bg);
}

.seed-input-container {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.seed-input-container label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.seed-row {
    display: flex;
    gap: 6px;
}

.seed-row input {
    flex-grow: 1;
    background-color: var(--btn-secondary-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 13px;
    outline: none;
    letter-spacing: 1.5px;
}

.seed-row input:focus {
    border-color: var(--border-light);
}

.sidebar-footer .btn-primary {
    width: 100%;
    padding: 12px;
    font-size: 13.5px;
}

kbd {
    background: rgba(var(--shadow-rgb), 0.2);
    border: 1px solid var(--text-dim);
    border-radius: 3px;
    box-shadow: 0 1px 0 rgba(var(--shadow-rgb), 0.2);
    color: var(--text-muted);
    font-size: 9px;
    padding: 1px 4px;
    font-family: var(--font-mono);
    margin-left: 4px;
}

/* ==========================================================================
   MAIN WORKBENCH PANEL
   ========================================================================== */

.workbench {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: var(--canvas-outer-bg);
    position: relative;
    overflow: hidden;
}

.workbench-bar {
    height: var(--header-height);
    border-bottom: 1px solid var(--border);
    background-color: var(--sidebar-bg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    z-index: 5;
    transition: background-color var(--transition-norm), border-color var(--transition-norm);
}

.workbench-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
    transition: background-color 0.3s ease;
}

.status-indicator.active {
    background-color: #10b981; /* Green status dot */
}

.export-group {
    display: flex;
    gap: 8px;
}

.btn-export {
    padding: 6px 12px;
    font-size: 12px;
}

/* ==========================================================================
   CANVAS VIEWPORT
   ========================================================================== */

.canvas-viewport {
    flex-grow: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    overflow: hidden;
    outline: none;
}

/* Grid Dots Background pattern */
.canvas-grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: 20px 20px;
    background-image: 
        radial-gradient(circle, var(--grid-dot-color) 1px, transparent 1.5px);
    pointer-events: none;
    z-index: 1;
}

/* Vector Canvas Shadow wrapper */
.canvas-shadow-wrapper {
    background-color: var(--canvas-bg);
    border: 1px solid var(--canvas-border);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.15);
    max-width: 100%;
    max-height: 100%;
    aspect-ratio: 1 / 1; /* Dynamic via JS */
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background-color var(--transition-norm),
                border-color var(--transition-norm);
    overflow: hidden;
}

/* SVG Rendering canvas */
#layout-canvas {
    width: 100%;
    height: 100%;
    display: block;
    user-select: none;
}

/* SVG styling classes injected by Renderer */
.svg-bg {
    fill: var(--canvas-bg);
    transition: fill var(--transition-norm);
}

.grid-line {
    stroke: var(--border);
    stroke-dasharray: 2 4;
}

.margin-line {
    stroke: var(--border-light);
    stroke-dasharray: 4 4;
}

.layout-box {
    fill: none;
    stroke: var(--text);
}

.layout-box.solid {
    fill: var(--text-dim);
    stroke: none;
}

.layout-circle {
    fill: none;
    stroke: var(--text);
}

.layout-circle.dotted {
    stroke-dasharray: 3 3;
}

.layout-circle.solid {
    fill: var(--text-dim);
    stroke: none;
}

.layout-line {
    stroke: var(--text-muted);
}

.layout-line.accent {
    stroke: var(--text);
}

.layout-text-zone {
    fill: none;
    stroke: var(--border-light);
}

.layout-text-bar {
    fill: var(--text-muted);
    opacity: 0.35;
}

.layout-headline-bar {
    fill: var(--text);
    opacity: 0.8;
}

.layout-detail-tick {
    stroke: var(--text-muted);
}

.layout-label {
    font-family: var(--font-mono);
    fill: var(--text-muted);
    font-size: 8px;
    letter-spacing: 0.5px;
}

.layout-label.anchor {
    fill: var(--text);
    font-weight: bold;
}

/* ==========================================================================
   WORKBENCH FOOTER STATUS BAR
   ========================================================================== */

.workbench-footer {
    height: var(--footer-height);
    background-color: var(--sidebar-bg);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px;
    font-size: 11px;
    color: var(--text-muted);
    z-index: 5;
    transition: background-color var(--transition-norm), border-color var(--transition-norm);
}

.footer-left, .footer-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.separator {
    color: var(--border-light);
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */

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