@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Syne:wght@400;600;700;800&display=swap');

/* ═══════════════════════════════════════════════════════════════
   HUB.CSS — Universal design system for all tools
   Individual tools use embedded CSS only for layout/sizing.
═══════════════════════════════════════════════════════════════ */

/* ── Reset & Variables ── */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg-dark:      #0a0e27;
    --bg-darker:    #050814;
    --accent-cyan:  #00ffff;
    --accent-pink:  #ff00ff;
    --text-light:   #e0e6ff;
    --text-muted:   #7b8cde;
    --surface:      #1a1f3a;
    --border:       #2d3558;
}

/* ── Base ── */
body {
    font-family: 'Space Mono', monospace;
    background: var(--bg-dark);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ── Animated Grid Background ── */
body::before {
    content: '';
    position: fixed; inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
    animation: gridPulse 8s ease-in-out infinite;
}

@keyframes gridPulse {
    0%, 100% { opacity: 0.1; }
    50%       { opacity: 0.15; }
}

/* ── Scanlines ── */
body::after {
    content: '';
    position: fixed; inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0,255,255,0.02) 50%);
    background-size: 100% 4px;
    z-index: 0;
    pointer-events: none;
    animation: scanlines 8s linear infinite;
}

@keyframes scanlines {
    0%   { transform: translateY(0); }
    100% { transform: translateY(4px); }
}

/* ── Hub Nav Bar ── */
.hub-nav {
    position: relative;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 28px;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border);
    animation: fadeInDown 0.4s ease-out;
    flex-shrink: 0;
}

.hub-nav::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
    opacity: 0.5;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hub-nav-brand {
    font-family: 'Syne', sans-serif;
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 4px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color 0.2s ease;
}

.hub-nav-brand:hover { color: var(--accent-cyan); }

.hub-nav-brand-diamond {
    width: 10px; height: 10px;
    background: var(--accent-cyan);
    transform: rotate(45deg);
    display: inline-block;
    box-shadow: 0 0 8px var(--accent-cyan);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: rotate(45deg) scale(1); }
    50%       { opacity: 0.6; transform: rotate(45deg) scale(0.85); }
}

.hub-nav-title {
    font-family: 'Syne', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 3px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hub-nav-tools {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ── Pill-style tool links in nav ── */
.hub-tool-link {
    font-family: 'Space Mono', monospace;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 7px 14px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.hub-tool-link:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.2);
    transform: translateY(-1px);
}

.hub-tool-link.active {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    background: rgba(0, 255, 255, 0.08);
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.15);
}

/* ── Buttons ── */
.btn-primary, .btn-secondary {
    padding: 10px 18px;
    font-family: 'Space Mono', monospace;
    font-size: 0.72rem;
    font-weight: 700;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.btn-icon {
    display: inline-block;
    transition: transform 0.2s ease;
}

.btn-primary {
    background: var(--accent-cyan);
    color: var(--bg-dark);
    box-shadow: 0 4px 10px rgba(0, 255, 255, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.3), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-primary:hover:not(:disabled)::before { transform: translateX(100%); }

.btn-primary:hover:not(:disabled) {
    background: var(--accent-pink);
    color: white;
    box-shadow: 0 6px 20px rgba(255, 0, 255, 0.4);
    transform: translateY(-2px);
}

.btn-primary:hover:not(:disabled) .btn-icon { transform: translateY(2px); }
.btn-primary:active:not(:disabled)          { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.2; cursor: not-allowed; box-shadow: none; }

.btn-secondary {
    background: transparent;
    border: 2px solid var(--border);
    color: var(--text-light);
}

.btn-secondary:hover:not(:disabled) {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
    transform: translateY(-1px);
}

.btn-secondary:disabled { opacity: 0.2; cursor: not-allowed; }

/* ── Upload / Drop Zone ── */
.upload-zone {
    background: var(--surface);
    border: 3px dashed var(--border);
    border-radius: 20px;
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    animation: floatIn 0.6s ease-out;
}

@keyframes floatIn {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(45deg, var(--accent-cyan), var(--accent-pink));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.upload-zone:hover::before, .upload-zone.dragover::before {
    opacity: 1;
    animation: borderRotate 3s linear infinite;
}

@keyframes borderRotate {
    0%   { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 255, 255, 0.2);
}

.upload-zone:active { transform: translateY(0); }

.upload-icon {
    color: var(--accent-cyan);
    margin-bottom: 15px;
    animation: floatBob 3s ease-in-out infinite;
}

@keyframes floatBob {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}

.upload-zone:hover .upload-icon {
    color: var(--accent-pink);
    animation: bounce 0.6s ease-out;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    25%  { transform: translateY(-15px); }
    50%  { transform: translateY(-7px); }
    75%  { transform: translateY(-12px); }
}

.upload-text {
    font-family: 'Syne', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.upload-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
    opacity: 0.8;
}

/* ── Panel / Card Surface ── */
.hub-panel {
    background: var(--bg-darker);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    position: relative;
}

.hub-panel-title {
    font-family: 'Syne', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hub-panel-label {
    font-size: 0.58rem;
    font-weight: 700;
    color: var(--accent-pink);
    text-transform: uppercase;
    letter-spacing: 2.5px;
    opacity: 0.75;
    margin-bottom: 12px;
}

/* ── Hint Keys (keyboard legend) ── */
.hint-key {
    display: inline-block;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.7rem;
    color: var(--accent-cyan);
    margin: 0 2px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hint-separator { margin: 0 8px; opacity: 0.5; }

/* ── Badge ── */
.hub-badge {
    font-size: 0.72rem;
    color: var(--text-muted);
    background: var(--surface);
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: all 0.3s ease, transform 0.15s ease;
    display: inline-block;
}

.hub-badge.active {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
}

.hub-badge.pop { transform: scale(1.2); }

/* ── Sprite Grid Container ── */
.sprite-grid-container {
    overflow-x: auto;
    overflow-y: hidden;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border);
    border-radius: 4px;
    white-space: nowrap;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-cyan) var(--border);
    scrollbar-gutter: stable;
}

.sprite-grid-container::-webkit-scrollbar          { height: 8px; background: transparent; }
.sprite-grid-container::-webkit-scrollbar-track    { background: var(--surface); border-radius: 4px; margin: 0 10px; }
.sprite-grid-container::-webkit-scrollbar-thumb    { background: linear-gradient(90deg, var(--accent-cyan), var(--accent-pink)); border-radius: 4px; }
.sprite-grid-container::-webkit-scrollbar-thumb:hover { background: var(--accent-pink); }

.sprite-grid {
    display: inline-flex;
    gap: 12px;
    min-width: min-content;
    height: 100%;
    align-items: center;
    padding: 12px;
}

/* ── Empty State ── */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: var(--text-muted);
    opacity: 0.5;
    animation: fadeIn 0.5s ease-out;
}

.empty-icon {
    font-size: 2rem;
    margin-bottom: 8px;
    animation: spinSlow 4s linear infinite;
}

@keyframes spinSlow {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

.empty-text  { font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; }
.empty-hint  { font-size: 0.7rem; opacity: 0.7; }

/* ── Sprite Slots ── */
.sprite-slot {
    width: 100px;
    height: 100px;
    flex-shrink: 0;
    border: 2px solid var(--border);
    background: var(--surface);
    position: relative;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.2s ease;
    border-radius: 4px;
    animation: slotAppear 0.3s ease-out backwards;
}

@keyframes slotAppear {
    from { opacity: 0; transform: scale(0.8) translateY(10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.sprite-slot:hover {
    border-color: var(--accent-cyan);
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 255, 255, 0.3);
    z-index: 10;
}

.sprite-slot.impact-frame {
    border: 2px solid var(--accent-pink);
    box-shadow: 0 0 20px rgba(255, 0, 255, 0.5);
    animation: impactGlow 1.5s ease-in-out infinite;
}

@keyframes impactGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(255, 0, 255, 0.5); border-color: var(--accent-pink); }
    50%       { box-shadow: 0 0 30px rgba(255, 0, 255, 0.8); border-color: #ff66ff; }
}

.sprite-slot.impact-frame::before {
    content: '◉';
    position: absolute; top: 4px; left: 4px;
    color: var(--accent-pink);
    font-size: 0.7rem;
    z-index: 5;
    animation: impactPulse 1s ease-in-out infinite;
}

@keyframes impactPulse {
    0%, 100% { transform: scale(1);   opacity: 1; }
    50%       { transform: scale(1.2); opacity: 0.7; }
}

.sprite-slot canvas {
    width: 100%; height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.2s ease;
}

.sprite-slot:hover canvas { transform: scale(1.05); }

.sprite-slot-number {
    position: absolute;
    bottom: 4px; right: 4px;
    background: rgba(0, 255, 255, 0.9);
    color: var(--bg-dark);
    font-size: 0.65rem;
    font-weight: bold;
    padding: 2px 6px;
    border-radius: 3px;
    z-index: 5;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.delete-btn {
    position: absolute; top: 4px; right: 4px;
    width: 20px; height: 20px;
    background: rgba(0,0,0,0.8);
    color: white;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    font-size: 11px;
    z-index: 10;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    opacity: 0;
    padding: 0;
    user-select: none;
}

.sprite-slot:hover .delete-btn { opacity: 1; }

.delete-btn:hover {
    background: var(--accent-pink);
    border-color: var(--accent-pink);
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
}

/* ── Loading Overlay ── */
#loadingOverlay {
    display: none;
    position: fixed; inset: 0;
    background: var(--bg-darker);
    z-index: 9999;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#loadingOverlay.active {
    display: flex;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.loading-spinner {
    width: 50px; height: 50px;
    border: 4px solid var(--border);
    border-top-color: var(--accent-cyan);
    border-right-color: var(--accent-pink);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
    font-family: 'Syne', sans-serif;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 8px;
    animation: textPulse 1.5s ease-in-out infinite;
}

@keyframes textPulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.5; }
}

.loading-subtext { font-size: 0.85rem; color: var(--text-muted); }

/* ── Nav Arrows (video tool) ── */
.nav-arrow {
    position: fixed;
    top: 50%; transform: translateY(-50%);
    z-index: 1000;
    pointer-events: none;
    opacity: 0;
}

.nav-arrow.show     { animation: arrowFadeOut 0.4s ease-out forwards; }
.nav-arrow.seek-hold { opacity: 1; animation: none; }

@keyframes arrowFadeOut { 0% { opacity: 1; } 100% { opacity: 0; } }

.nav-arrow.left  { left:  40px; }
.nav-arrow.right { right: 40px; }

.nav-arrow svg { width: 80px; height: 80px; filter: drop-shadow(0 0 20px currentColor); }
.nav-arrow.left svg, .nav-arrow.right svg { color: var(--accent-cyan); }

.nav-arrow .arrow-double { display: none; }
.nav-arrow .arrow-single { display: block; }
.nav-arrow.seek-hold .arrow-single { display: none; }
.nav-arrow.seek-hold .arrow-double { display: block; }

/* ── Seek / Range Indicators ── */
.seek-mode-indicator {
    position: fixed; top: 20px; right: 30px;
    z-index: 1000;
    background: var(--surface);
    border: 2px solid var(--accent-cyan);
    padding: 8px 18px;
    border-radius: 8px;
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 0.75rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.35);
    animation: slideDown 0.25s ease-out, seekPulse 1.5s ease-in-out infinite;
    pointer-events: none;
}

@keyframes seekPulse {
    0%, 100% { box-shadow: 0 0 20px rgba(0,255,255,0.35); border-color: var(--accent-cyan); }
    50%       { box-shadow: 0 0 30px rgba(0,255,255,0.65); border-color: #66ffff; }
}

.range-mode-indicator {
    position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
    z-index: 1000;
    background: var(--surface);
    border: 2px solid var(--accent-pink);
    padding: 12px 24px;
    border-radius: 8px;
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    color: var(--accent-pink);
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 0 30px rgba(255, 0, 255, 0.4);
    animation: slideDown 0.3s ease-out, rangePulse 1.5s ease-in-out infinite;
    pointer-events: none;
    text-align: center;
}

@keyframes rangePulse {
    0%, 100% { box-shadow: 0 0 30px rgba(255,0,255,0.4); border-color: var(--accent-pink); }
    50%       { box-shadow: 0 0 40px rgba(255,0,255,0.7); border-color: #ff66ff; }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateX(-50%) translateY(-20px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}

.range-mode-indicator .range-count {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* ── Side Controls Panel ── */
.side-controls {
    position: fixed;
    left: 20px; top: 70px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 14px;
    pointer-events: none;
    animation: fadeInUp 0.5s ease-out 0.3s both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.side-controls-title {
    font-family: 'Syne', sans-serif;
    font-size: 0.6rem;
    font-weight: 800;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: -6px;
}

.side-controls-section { display: flex; flex-direction: column; gap: 5px; }

.side-ctrl-label {
    font-size: 0.55rem;
    font-weight: 700;
    color: var(--accent-pink);
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.7;
    margin-bottom: 1px;
}

.side-ctrl-row {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.62rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.side-ctrl-row span:last-child { opacity: 0.65; }

/* ── Nav Hint (video area) ── */
.nav-hint {
    margin-top: 15px;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    text-align: center;
    line-height: 1.6;
    animation: fadeInUp 0.5s ease-out 0.3s both;
}

.preview-hint-label { color: var(--accent-pink); font-weight: bold; }

#fpsDisplay {
    color: var(--accent-cyan);
    transition: color 0.15s ease, transform 0.15s ease;
    display: inline-block;
}

#fpsDisplay.fps-flash { color: var(--accent-pink); transform: scale(1.2); }
.preview-hint-sub { font-size: 0.6rem; opacity: 0.8; }

/* ── Animations ── */
@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .hub-nav { flex-wrap: wrap; gap: 10px; padding: 10px 16px; }
    .hub-nav-tools { flex-wrap: wrap; }
    .side-controls { display: none; }
}