/* 
   Peonia — style.css
   Design: clean editorial tool, warm gradient aesthetic.
   All colors driven by CSS custom properties updated from JS.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Space+Mono:wght@400;700&family=Playfair+Display:ital@1&display=swap');

/* Dynamic token defaults (JS overrides these)*/
:root {
    --bg: #f0ebe2;
    --text: #1c1610;
    --muted: #857265;
    --accent: #b85c2a;
    --accent-r: 184;
    --accent-g: 92;
    --accent-b: 42;
    --panel-bg: rgba(255, 255, 255, 0.92);
    --ctrl-bg: rgba(0, 0, 0, 0.045);
    --border: rgba(184, 92, 42, 0.16);
    --track: rgba(0, 0, 0, 0.12);
    --thumb-bg: #ffffff;
    --input-bg: rgba(0, 0, 0, 0.03);

    /* Static */
    --f-ui: 'Inter', system-ui, sans-serif;
    --f-val: 'Space Mono', monospace;
    --panel-w: 320px;
    --top-h: 52px;
    --radius: 8px;
    --radius-sm: 4px;
}

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

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--f-ui);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background 0.5s ease, color 0.4s ease;
}

/* ── Canvas ── */
#canvas-container {
    position: fixed;
    inset: 0;
    z-index: 0;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#canvas-container.panel-open {
    transform: translateX(-160px);
}

/* Decorative gradient accent behind the flower */
#canvas-decoration {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 60% 50% at 80% 60%,
            rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.06) 0%,
            transparent 70%),
        radial-gradient(ellipse 40% 35% at 20% 85%,
            rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1) 0%,
            transparent 65%);
    transition: opacity 0.6s ease;
}

/* ── Top bar ── */
#top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    height: var(--top-h);
    display: flex;
    align-items: center;
    padding: 0 22px;
    gap: 14px;
    pointer-events: none;
}

.logo {
    font-family: 'Space Mono', monospace;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--accent);
    transition: color 0.4s;
}

.tagline {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 14px;
    color: var(--muted);
    transition: color 0.4s;
}

/* ── Toggle button ── */
#panel-toggle {
    position: fixed;
    top: 12px;
    right: 14px;
    z-index: 300;
    display: flex;
    align-items: center;
    gap: 7px;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--f-ui);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 7px 14px;
    cursor: pointer;
    border-radius: 20px;
    backdrop-filter: blur(12px);
    transition:
        background 0.2s, border-color 0.2s, color 0.2s,
        right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

#panel-toggle:hover {
    background: var(--ctrl-bg);
    border-color: var(--accent);
}

#panel-toggle.panel-open {
    right: calc(var(--panel-w) + 10px);
}

#panel-toggle svg {
    width: 14px;
    height: 14px;
    stroke: var(--accent);
    flex-shrink: 0;
}

/* ── Reset button ── */
#reset-btn {
    position: fixed;
    bottom: 22px;
    left: 20px;
    z-index: 150;
    font-family: var(--f-ui);
    font-size: 12px;
    font-weight: 500;
    color: var(--muted);
    background: var(--panel-bg);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}

#reset-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ── Panel ── */
#panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--panel-w);
    z-index: 100;
    background: var(--panel-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transform: translateX(var(--panel-w));
    transition:
        transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        background 0.5s ease,
        border-color 0.4s ease;
    box-shadow: -8px 0 40px rgba(0, 0, 0, 0.06);
}

#panel.open {
    transform: translateX(0);
}

/* Panel header */
#panel-header {
    padding: 20px 20px 0;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

/* Decorative glow in panel header */
#panel-header::after {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: radial-gradient(circle,
            rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.18) 0%,
            transparent 65%);
    pointer-events: none;
}

.panel-title {
    font-family: 'Space Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    transition: color 0.4s;
}

.panel-sub {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 13px;
    color: var(--muted);
    margin-top: 2px;
    transition: color 0.4s;
}

/* ── Tabs ── */
#panel-tabs {
    display: flex;
    margin: 16px 0 0;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    padding: 0 4px;
    transition: border-color 0.4s;
}

.tab-btn {
    flex: 1;
    font-family: var(--f-ui);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--muted);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    padding: 9px 4px 8px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
    white-space: nowrap;
}

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

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ── Tab content ── */
.tab-content {
    display: none;
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 18px 18px 80px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.tab-content::-webkit-scrollbar {
    width: 3px;
}

.tab-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.tab-content.active {
    display: block;
}

/* ── Section headers ── */
.ctrl-section {
    font-family: var(--f-ui);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 22px 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    transition: color 0.4s, border-color 0.4s;
}

.ctrl-section:first-child {
    margin-top: 4px;
}

/* ── Preset grid ── */
#preset-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.preset-btn {
    background: var(--ctrl-bg);
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    overflow: hidden;
    text-align: left;
    transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.preset-btn:hover {
    border-color: var(--border);
    transform: translateY(-1px);
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.08);
}

.preset-btn.active {
    border-color: var(--accent);
    box-shadow: 0 2px 12px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.25);
}

.preset-swatch {
    height: 24px;
    width: 100%;
}

.preset-name {
    display: block;
    font-family: var(--f-ui);
    font-size: 11px;
    font-weight: 500;
    color: var(--text);
    padding: 6px 8px;
    transition: color 0.3s;
}

/* ── Slider rows ── */
.ctrl-row {
    display: grid;
    grid-template-columns: 88px 1fr 38px;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.ctrl-label {
    font-family: var(--f-ui);
    font-size: 12px;
    font-weight: 400;
    color: var(--muted);
    transition: color 0.4s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ctrl-val {
    font-family: var(--f-val);
    font-size: 10px;
    color: var(--text);
    text-align: right;
    letter-spacing: -0.02em;
    transition: color 0.4s;
}

/* ── Slider ── */
input[type="range"].ctrl-slider {
    --fill: 0%;
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right,
            var(--accent) 0%,
            var(--accent) var(--fill),
            var(--track) var(--fill),
            var(--track) 100%);
    outline: none;
    cursor: pointer;
    transition: background 0.15s;
}

input[type="range"].ctrl-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--thumb-bg);
    border: 2px solid var(--accent);
    cursor: pointer;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.15);
    transition: transform 0.1s, box-shadow 0.1s;
}

input[type="range"].ctrl-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--thumb-bg);
    border: 2px solid var(--accent);
    cursor: pointer;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.15);
}

input[type="range"].ctrl-slider:hover::-webkit-slider-thumb {
    transform: scale(1.15);
    box-shadow: 0 2px 10px rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.35);
}

/* ── Color picker rows ── */
.color-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    gap: 10px;
}

.color-label {
    font-family: var(--f-ui);
    font-size: 12px;
    color: var(--muted);
    flex: 1;
    transition: color 0.4s;
}

.color-pick-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-hex {
    font-family: var(--f-val);
    font-size: 10px;
    color: var(--text);
    letter-spacing: 0.04em;
    opacity: 0.7;
    width: 58px;
    text-align: right;
}

input[type="color"] {
    -webkit-appearance: none;
    width: 36px;
    height: 36px;
    padding: 3px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: none;
    transition: border-color 0.2s;
}

input[type="color"]:hover {
    border-color: var(--accent);
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

/* ── Render mode grid ── */
#render-mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
    margin-bottom: 18px;
}

.render-btn {
    font-family: var(--f-ui);
    font-size: 11px;
    font-weight: 500;
    color: var(--muted);
    background: var(--ctrl-bg);
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    padding: 8px 4px;
    cursor: pointer;
    text-align: center;
    transition: color 0.18s, background 0.18s, border-color 0.18s;
}

.render-btn:hover {
    color: var(--text);
    border-color: var(--border);
}

.render-btn.active {
    color: var(--accent);
    background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
    border-color: var(--accent);
    font-weight: 600;
}

/* ── FX toggles ── */
.fx-row {
    margin-bottom: 16px;
}

.fx-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.fx-label {
    font-family: var(--f-ui);
    font-size: 12px;
    font-weight: 500;
    color: var(--text);
    transition: color 0.4s;
}

.fx-sub {
    padding-left: 44px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Toggle switch */
.toggle {
    position: relative;
    width: 32px;
    height: 18px;
    flex-shrink: 0;
    cursor: pointer;
}

.toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-track {
    position: absolute;
    inset: 0;
    background: var(--track);
    border-radius: 9px;
    border: 1.5px solid var(--border);
    transition: background 0.2s, border-color 0.2s;
}

.toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--muted);
    transition: transform 0.2s, background 0.2s;
}

.toggle input:checked~.toggle-track {
    background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.2);
    border-color: var(--accent);
}

.toggle input:checked~.toggle-thumb {
    transform: translateX(14px);
    background: var(--accent);
}

/* ── Code editor ── */
.code-presets {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.code-preset-btn {
    font-family: var(--f-ui);
    font-size: 11px;
    font-weight: 500;
    color: var(--muted);
    background: var(--ctrl-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 4px 12px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.code-preset-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.code-sig {
    font-family: var(--f-val);
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 0.02em;
    line-height: 1.6;
    margin-bottom: 3px;
}

#code-editor {
    width: 100%;
    height: 130px;
    background: var(--input-bg);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--f-val);
    font-size: 11px;
    line-height: 1.7;
    padding: 10px 12px;
    resize: none;
    outline: none;
    tab-size: 2;
    transition: border-color 0.2s;
}

#code-editor:focus {
    border-color: var(--accent);
}

.code-note {
    font-family: var(--f-ui);
    font-size: 11px;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

.code-note code {
    font-family: var(--f-val);
    font-size: 10px;
    background: var(--ctrl-bg);
    padding: 1px 5px;
    border-radius: 3px;
    border: 1px solid var(--border);
}

.code-bottom {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}

#code-error {
    font-family: var(--f-val);
    font-size: 10px;
    color: #d43f3f;
    letter-spacing: 0.02em;
    flex: 1;
    display: none;
}

#code-ok {
    font-family: var(--f-ui);
    font-size: 11px;
    color: #3d9e5e;
    flex: 1;
    display: none;
}

/* ── Buttons ── */
.btn {
    font-family: var(--f-ui);
    font-size: 12px;
    font-weight: 500;
    color: var(--accent);
    background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.1);
    border: 1.5px solid rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.3);
    border-radius: 20px;
    padding: 7px 16px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    white-space: nowrap;
}

.btn:hover {
    background: rgba(var(--accent-r), var(--accent-g), var(--accent-b), 0.18);
    border-color: var(--accent);
}

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

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

/* ── Share tab ── */
.share-url-box {
    font-family: var(--f-val);
    font-size: 10px;
    color: var(--muted);
    background: var(--input-bg);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
    word-break: break-all;
    line-height: 1.7;
    margin-bottom: 12px;
    min-height: 70px;
    letter-spacing: 0.02em;
}

.share-tip {
    font-family: var(--f-ui);
    font-size: 11px;
    color: var(--muted);
    line-height: 1.7;
    margin-top: 14px;
}

/* ── Divider ── */
.divider {
    height: 1px;
    background: var(--border);
    margin: 4px 0 16px;
    transition: background 0.4s;
}

/* ── Responsive ── */
@media (max-width: 680px) {
    :root {
        --panel-w: 100vw;
    }

    #canvas-container.panel-open {
        transform: none;
    }

    #panel-toggle.panel-open {
        right: 14px;
    }
}