/* ===== CSS Variables ===== */
:root {
    --bg: #f5f5f5;
    --text: #111111;
    --toolbar-bg: rgba(255,255,255,0.88);
    --node-text: #ffffff;
    --line-color: #555555;
    --card-shadow: 0 2px 12px rgba(0,0,0,0.10);
    --border-radius: 12px;
    --modal-bg: #ffffff;
    --input-bg: rgba(0,0,0,0.06);
    --btn-primary-bg: #111111;
    --btn-primary-text: #ffffff;
    --btn-cancel-bg: rgba(0,0,0,0.07);
    --btn-cancel-text: #111111;
    --badge-border: rgba(0,0,0,0.08);
}
body.dark-mode {
    --bg: #0e0e0e;
    --text: #eeeeee;
    --toolbar-bg: rgba(20,20,20,0.88);
    --node-text: #ffffff;
    --line-color: #aaaaaa;
    --card-shadow: 0 2px 12px rgba(0,0,0,0.50);
    --modal-bg: #1a1a1a;
    --input-bg: rgba(255,255,255,0.08);
    --btn-primary-bg: #eeeeee;
    --btn-primary-text: #111111;
    --btn-cancel-bg: rgba(255,255,255,0.08);
    --btn-cancel-text: #eeeeee;
    --badge-border: rgba(255,255,255,0.08);
}

/* ===== Reset & Base ===== */
* {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    user-select: none;
    -webkit-user-select: none;
}
body {
    margin: 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--bg);
    color: var(--text);
    transition: background-color 0.35s, color 0.35s;
}

/* ===== Orientation Warning ===== */
.orientation-warning {
    display: none;
    position: fixed;
    top:0; left:0; width:100vw; height:100vh;
    background: var(--bg);
    z-index: 9999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text);
    text-align: center;
    transition: background-color 0.35s;
}
.rotate-anim {
    font-size: 60px;
    margin-bottom: 20px;
    position: relative;
    animation: pulseRotate 2s infinite ease-in-out;
}
.rotate-anim .ms-Icon--Refresh {
    position: absolute;
    top: -10px; right: -20px;
    font-size: 30px;
    color: #bbb;
}
@keyframes pulseRotate {
    0%   { transform: rotate(0deg) scale(1); }
    50%  { transform: rotate(90deg) scale(1.1); }
    100% { transform: rotate(90deg) scale(1); }
}

/* ===== Guide Page ===== */
.guide-page {
    position: fixed;
    top:0; left:0; width:100vw; height:100vh;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: transparent;
}
.guide-bg-canvas {
    position: absolute;
    top:0; left:0;
    width: 100%; height: 100%;
    z-index: 0;
}
.guide-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    animation: fadeInUp 0.9s cubic-bezier(0.22,1,0.36,1) both;
}
.guide-icon {
    width: 80px; height: 80px;
    margin-bottom: 16px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}
.guide-title {
    margin: 0 0 8px 0;
    font-size: 34px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #1a1a1a;
}
.guide-subtitle {
    margin: 0 0 36px 0;
    font-size: 16px;
    color: #6b7280;
    letter-spacing: 0.5px;
}
.guide-btn {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    border: none;
    color: #333;
    padding: 14px 40px;
    border-radius: 40px;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 24px rgba(0,188,212,0.18), 0 2px 8px rgba(255,105,135,0.12);
    transition: transform 0.15s, box-shadow 0.15s, filter 0.15s;
    position: relative;
    overflow: hidden;
}
.guide-btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #fed6e3 0%, #a8edea 100%);
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: inherit;
}
.guide-btn:hover::after { opacity: 0.5; }
.guide-btn:active {
    transform: scale(0.96);
    box-shadow: 0 2px 12px rgba(0,188,212,0.14);
}

/* ===== Main App ===== */
.main-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    position: relative;
    background: var(--bg);
    transition: background-color 0.35s;
}

/* ===== Toolbars ===== */
.toolbar-left {
    position: absolute;
    top: 14px; left: 14px;
    z-index: 10;
    display: flex;
    gap: 8px;
    align-items: center;
}
.toolbar-right {
    position: absolute;
    top: 14px; right: 14px;
    z-index: 10;
    display: flex;
    gap: 8px;
    align-items: center;
}
.pill-btn, .user-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--toolbar-bg);
    color: var(--text);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--card-shadow);
    cursor: pointer;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--badge-border);
    transition: transform 0.13s, box-shadow 0.13s, background-color 0.3s;
    outline: none;
}
.pill-btn.icon-only {
    padding: 8px 10px;
}
.pill-btn:active, .user-badge:active {
    transform: scale(0.94);
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.toolbar {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    padding: 6px 14px;
    background: var(--toolbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 50px;
    gap: 6px;
    align-items: center;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--badge-border);
    z-index: 10;
    white-space: nowrap;
    transition: background-color 0.3s, box-shadow 0.3s;
}
.group { display: flex; gap: 4px; align-items: center; }
.divider {
    width: 1px; height: 20px;
    background: rgba(128,128,128,0.2);
    margin: 0 4px;
}
.toolbar button, .toolbar select {
    background: transparent;
    border: none;
    color: var(--text);
    padding: 6px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px; height: 32px;
    transition: background-color 0.13s, transform 0.1s, color 0.3s;
}
.toolbar select {
    width: auto;
    border-radius: 12px;
    padding: 0 8px;
    font-size: 13px;
    font-weight: 500;
}
.toolbar select option { background: var(--bg); color: var(--text); }
.toolbar button:active {
    background: rgba(128,128,128,0.18);
    transform: scale(0.92);
}

/* ===== Canvas ===== */
.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    touch-action: none;
    margin-top: 0;
}
#zoomLayer {
    position: absolute;
    width: 100%; height: 100%;
    transform-origin: 0 0;
    will-change: transform;
}
#linesLayer, #nodesLayer {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none;
    overflow: visible;
}

/* ===== Nodes ===== */
.node {
    position: absolute;
    padding: 8px;
    border-radius: var(--border-radius);
    cursor: pointer;
    pointer-events: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: var(--card-shadow);
    color: var(--node-text);
    word-break: break-all;
    transform: translate(-50%, -50%);
    font-weight: 600;
    touch-action: none;
    line-height: 1.3;
    overflow: hidden;
    transition: box-shadow 0.15s, transform 0.1s;
    will-change: transform;
}
.node:active { box-shadow: 0 1px 4px rgba(0,0,0,0.12); }
.node-label {
    position: absolute;
    top: -8px; left: -8px;
    background: rgba(0,0,0,0.55);
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    border-radius: 6px;
    padding: 1px 4px;
    pointer-events: none;
    line-height: 1.4;
    letter-spacing: 0.5px;
}
.node.move-pending {
    animation: pulsePending 0.7s infinite alternate ease-in-out;
    cursor: crosshair;
}
@keyframes pulsePending {
    from { box-shadow: 0 0 0 0 rgba(0,0,0,0.18); }
    to   { box-shadow: 0 0 0 8px rgba(0,0,0,0.04); }
}

.link-path, .link-text { cursor: pointer; pointer-events: visibleStroke; }
.link-text { pointer-events: visibleFill; }

/* ===== Modals ===== */
.modal {
    display: none;
    position: fixed;
    top:0; left:0; width:100vw; height:100vh;
    background: rgba(0,0,0,0.38);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}
.modal.show {
    display: flex;
    animation: fadeIn 0.18s ease;
}
.compact-modal {
    background: var(--modal-bg);
    padding: 18px 16px 14px;
    border-radius: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 90%;
    max-width: 300px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.18);
    animation: slideUp 0.22s cubic-bezier(0.34,1.56,0.64,1);
    border: 1px solid var(--badge-border);
    transition: background-color 0.3s;
}
.compact-modal h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 700;
    text-align: center;
    flex-shrink: 0;
    color: var(--text);
    letter-spacing: 0.2px;
}
.dialog-msg {
    text-align: center;
    font-size: 13px;
    line-height: 1.5;
    word-break: break-all;
    color: var(--text);
    opacity: 0.8;
}
.compact-modal input, .compact-modal select {
    padding: 9px 10px;
    border: none;
    border-radius: 10px;
    background: var(--input-bg);
    color: var(--text);
    font-size: 14px;
    width: 100%;
    flex-shrink: 0;
    outline: none;
    transition: background-color 0.2s, box-shadow 0.2s;
}
.compact-modal input:focus {
    box-shadow: 0 0 0 2px rgba(0,0,0,0.12);
}
body.dark-mode .compact-modal input:focus {
    box-shadow: 0 0 0 2px rgba(255,255,255,0.12);
}
.size-inputs { display: flex; gap: 6px; flex-shrink: 0; }
.color-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 5px;
    margin: 2px 0;
    flex-shrink: 0;
}
.color-swatch {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.1);
    transition: transform 0.15s, box-shadow 0.15s;
}
.color-swatch.selected {
    transform: scale(1.22);
    box-shadow: 0 0 0 2px var(--modal-bg), 0 0 0 4px var(--text);
}
.compact-modal button {
    width: 100%;
    height: 38px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
    border: none;
    cursor: pointer;
    transition: transform 0.12s, filter 0.12s;
}
.compact-modal button:active { transform: scale(0.97); filter: brightness(0.94); }

.dialog-btns {
    display: flex;
    gap: 8px;
    margin-top: 2px;
}
.btn-primary {
    background: var(--btn-primary-bg) !important;
    color: var(--btn-primary-text) !important;
}
.btn-danger {
    background: #ffecec !important;
    color: #c0392b !important;
}
body.dark-mode .btn-danger {
    background: #2d1515 !important;
    color: #e57373 !important;
}
.btn-cancel {
    background: var(--btn-cancel-bg) !important;
    color: var(--btn-cancel-text) !important;
}

/* ===== Connect Modal ===== */
.connect-selectors {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    max-height: 150px;
}
.selector-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
    padding-right: 2px;
}
.selector-col h4 { margin: 0 0 4px 0; font-size: 12px; text-align: center; opacity: 0.7; }
.node-pill-list { display: flex; flex-direction: column; gap: 4px; }
.node-pill {
    padding: 7px 8px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 12px;
    color: white;
    text-align: center;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    border: 2px solid transparent;
    font-weight: 600;
    transition: border-color 0.13s, transform 0.1s;
}
.node-pill.selected {
    border-color: var(--text);
    transform: scale(1.03);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
    from { transform: translateY(16px) scale(0.97); opacity: 0; }
    to   { transform: translateY(0) scale(1); opacity: 1; }
}

/* ===== Scrollbar (for selector cols) ===== */
.selector-col::-webkit-scrollbar { width: 3px; }
.selector-col::-webkit-scrollbar-thumb { background: rgba(128,128,128,0.3); border-radius: 2px; }