@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    transition: background-color 0.4s ease;
}

body.locked {
    overflow-x: hidden;
}

/* ==========================================================================
   Ambient Background Mesh & Dust
   ========================================================================== */
.ambient-mesh {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.mesh-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.6;
    animation: floatMesh 18s ease-in-out infinite alternate;
}

.mesh-blob-1 {
    width: 600px;
    height: 600px;
    background: var(--mesh-blob-1);
    top: -150px;
    left: -100px;
}

.mesh-blob-2 {
    width: 650px;
    height: 650px;
    background: var(--mesh-blob-2);
    top: 20%;
    right: -150px;
    animation-delay: -6s;
}

.mesh-blob-3 {
    width: 500px;
    height: 500px;
    background: var(--mesh-blob-3);
    bottom: -100px;
    left: 25%;
    animation-delay: -12s;
}

@keyframes floatMesh {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(40px, -30px) scale(1.08); }
    100% { transform: translate(-30px, 40px) scale(0.95); }
}

#particleCanvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

/* ==========================================================================
   Layout & Container
   ========================================================================== */
.app-container {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ==========================================================================
   Header Navbar
   ========================================================================== */
.header-bar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.5rem;
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 1.25rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    flex-wrap: wrap;
    gap: 1rem;
}

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

.brand-icon {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    filter: drop-shadow(0 0 10px var(--accent-cyan));
}

.brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: contain;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.brand-title {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pro-badge {
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    padding: 0.2rem 0.5rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: #000;
    border-radius: 999px;
    text-transform: uppercase;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 0.85rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    border-radius: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

.action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--border-glass-glow);
    transform: translateY(-1px);
}

.action-btn.active {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--accent-blue);
    color: var(--accent-cyan);
}

.action-select {
    padding: 0.5rem 0.85rem;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    border-radius: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s ease;
}

.action-select:hover, .action-select:focus {
    border-color: var(--accent-cyan);
}

/* ==========================================================================
   Hero Deck & Lock Console
   ========================================================================== */
.hero-deck {
    width: 100%;
    max-width: 680px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 2rem;
}

.hero-deck h1 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    background: linear-gradient(180deg, #ffffff 30%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    transition: color 0.3s ease;
}

/* Big Interactive Lock/Unlock Core */
.lock-core-wrapper {
    position: relative;
    width: 210px;
    height: 210px;
    margin: 0 auto 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lock-svg-ring {
    position: absolute;
    inset: -12px;
    width: calc(100% + 24px);
    height: calc(100% + 24px);
    pointer-events: none;
    transform: rotate(-90deg);
}

.lock-ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.05);
    stroke-width: 6;
}

.lock-ring-progress {
    fill: none;
    stroke: var(--accent-cyan);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 660;
    stroke-dashoffset: 660;
    transition: stroke-dashoffset 0.05s linear;
}

.lock-core-btn {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--lock-idle-bg);
    border: 3px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), inset 0 2px 4px rgba(255, 255, 255, 0.15);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    outline: none;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 2;
    touch-action: none;
}

.lock-core-btn:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 35px rgba(56, 189, 248, 0.35), inset 0 2px 6px rgba(255, 255, 255, 0.25);
    transform: scale(1.02);
}

.lock-core-btn:active {
    transform: scale(0.97);
}

.lock-icon-box {
    font-size: 2.75rem;
    color: var(--text-primary);
    margin-bottom: 0.35rem;
    transition: all 0.3s ease;
}

.lock-btn-label {
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-primary);
}

.lock-btn-sublabel {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    margin-top: 0.2rem;
    text-transform: uppercase;
}

/* Active Locked State for Core Button */
body.locked .lock-core-btn {
    background: var(--lock-active-bg);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 45px var(--lock-active-glow), inset 0 2px 8px rgba(255, 255, 255, 0.4);
    animation: lockPulse 2s infinite;
}

body.locked .lock-ring-progress {
    stroke: #ffffff;
}

@keyframes lockPulse {
    0% { box-shadow: 0 0 30px var(--lock-active-glow); }
    50% { box-shadow: 0 0 60px var(--lock-active-glow), 0 0 90px rgba(239, 68, 68, 0.3); }
    100% { box-shadow: 0 0 30px var(--lock-active-glow); }
}

/* Safety Unlock Mode Picker */
.safety-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.mode-pill-group {
    display: inline-flex;
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: 999px;
    padding: 0.25rem;
    gap: 0.25rem;
}

.mode-pill {
    padding: 0.4rem 0.9rem;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 999px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-pill:hover {
    color: var(--text-primary);
}

.mode-pill.active {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}


/* ==========================================================================
   Real-Time Telemetry HUD
   ========================================================================== */
.telemetry-hud {
    width: 100%;
    max-width: 960px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.hud-card {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 1rem;
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    transition: all 0.25s ease;
}

.hud-card:hover {
    border-color: var(--border-glass-glow);
    transform: translateY(-2px);
}

.hud-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.hud-title {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.hud-icon {
    font-size: 0.9rem;
    color: var(--accent-cyan);
}

.hud-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 0.4rem;
}

.hud-footer {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

/* Mini Progress Bar */
.mini-progress-track {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    overflow: hidden;
    margin-top: 0.4rem;
}

.mini-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
    border-radius: 999px;
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Virtual Keyboard Canvas / Deck
   ========================================================================== */
.keyboard-wrapper {
    width: 100%;
    max-width: 1100px;
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 1.75rem;
    padding: 1.5rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    margin-bottom: 3rem;
    transition: border-color 0.3s ease;
}

.keyboard-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border-glass);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.layout-selector {
    display: inline-flex;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-glass);
    border-radius: 0.75rem;
    padding: 3px;
    gap: 3px;
}

.layout-tab {
    padding: 0.4rem 0.85rem;
    font-size: 0.78rem;
    font-weight: 700;
    border-radius: 0.55rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.layout-tab.active {
    background: var(--bg-surface-elevated);
    color: var(--accent-cyan);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.keyboard-deck {
    background: #090d16;
    border: 2px solid #1e293b;
    border-radius: 1.25rem;
    padding: 14px;
    box-shadow: inset 0 4px 12px rgba(0, 0, 0, 0.8), 0 2px 6px rgba(255, 255, 255, 0.05);
    overflow-x: auto;
    overflow-y: hidden;
}

/* Rows & Keys */
.kbd-row {
    display: flex;
    gap: 5px;
    margin-bottom: 5px;
}

.kbd-row:last-child {
    margin-bottom: 0;
}

.kbd-key {
    height: 44px;
    border-radius: 7px;
    background: var(--key-top);
    border: 1px solid var(--key-border);
    box-shadow: var(--key-shadow);
    color: var(--key-text);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 700;
    position: relative;
    user-select: none;
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, color 0.25s ease, transform 0.08s ease;
    cursor: default;
    min-width: 32px;
}

.kbd-key .sub-legend {
    font-size: 0.6rem;
    opacity: 0.65;
    line-height: 1;
}

.kbd-key .main-legend {
    line-height: 1;
}

/* Key Split Layout (Arrow Up/Down) */
.kbd-key-split {
    display: flex;
    flex-direction: column;
    gap: 3px;
    height: 44px;
}

.kbd-split-half {
    flex: 1;
    border-radius: 5px;
    background: var(--key-top);
    border: 1px solid var(--key-border);
    box-shadow: 0 2px 0 #090d16;
    color: var(--key-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 700;
    transition: all 0.2s ease;
}

/* Cleaned State */
.kbd-key.cleaned,
.kbd-split-half.cleaned {
    background: var(--key-cleaned-bg);
    border-color: var(--key-cleaned-border);
    color: var(--key-cleaned-text);
    box-shadow: var(--key-cleaned-glow), var(--key-shadow);
}

/* Active Depressed State */
.kbd-key.active,
.kbd-split-half.active {
    background: var(--key-active-bg) !important;
    border-color: var(--key-active-border) !important;
    color: #ffffff !important;
    box-shadow: var(--key-active-glow), 0 1px 0 #000 !important;
    transform: translateY(2px);
}

/* Heatmap Overlays */
.kbd-key.heat-1 { border-color: rgba(56, 189, 248, 0.8); }
.kbd-key.heat-2 { border-color: rgba(52, 211, 153, 0.9); box-shadow: 0 0 12px rgba(52, 211, 153, 0.5); }
.kbd-key.heat-3 { border-color: rgba(251, 191, 36, 0.9); box-shadow: 0 0 16px rgba(251, 191, 36, 0.6); }
.kbd-key.heat-4 { border-color: rgba(239, 68, 68, 1); box-shadow: 0 0 20px rgba(239, 68, 68, 0.8); }

/* Fullsize Keyboard Multi-Section Layout */
.fullsize-grid {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.fullsize-section {
    display: flex;
    flex-direction: column;
}

.fullsize-section.main-block { flex: 15; }
.fullsize-section.nav-block { flex: 3.5; }
.fullsize-section.numpad-block { flex: 4.5; }

/* Floating Sparkle/Key Bubbles */
.floating-key-bubble {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 800;
    font-size: 1.5rem;
    color: #ffffff;
    text-shadow: 0 0 15px var(--accent-cyan);
    animation: floatUpBurst 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes floatUpBurst {
    0% { transform: translate(-50%, -50%) scale(0.6) rotate(0deg); opacity: 0; }
    20% { transform: translate(-50%, -70%) scale(1.15) rotate(var(--rot)); opacity: 1; }
    100% { transform: translate(-50%, -150%) scale(0.9) rotate(var(--rot)); opacity: 0; }
}

/* ==========================================================================
   Screen Cleaning / Dust Inspection Mode
   ========================================================================== */
.screen-inspection-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding-bottom: 2rem;
    transition: background-color 0.2s ease;
}

.screen-inspection-overlay.visible {
    display: flex;
}

.screen-toolbar {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.screen-color-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.screen-color-btn:hover {
    transform: scale(1.15);
    border-color: #fff;
}

.screen-color-btn.active {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 12px var(--accent-cyan);
}

.screen-exit-btn {
    padding: 0.4rem 1rem;
    background: #ef4444;
    color: #fff;
    border: none;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.8rem;
    cursor: pointer;
    margin-left: 0.5rem;
}

/* Grid pattern for screen inspection */
.screen-grid-pattern {
    background-size: 20px 20px;
    background-image: 
        linear-gradient(to right, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
}


/* ==========================================================================
   Knowledge & Pro Guide Section (SEO Content)
   ========================================================================== */
.guide-section {
    width: 100%;
    max-width: 860px;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.guide-card {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: 1.25rem;
    padding: 1.75rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.guide-card h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.guide-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent-cyan);
    margin: 1.25rem 0 0.5rem;
}

.guide-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.step-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin: 1rem 0;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(56, 189, 248, 0.2);
    color: var(--accent-cyan);
    font-weight: 800;
    font-size: 0.75rem;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Accordion FAQ */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid var(--border-glass);
    border-radius: 0.75rem;
    background: rgba(0, 0, 0, 0.15);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.faq-question {
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
}

.faq-question:hover {
    color: var(--accent-cyan);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 1.25rem;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0.5rem 1.25rem 1.25rem;
}

.faq-item.open .faq-chevron {
    transform: rotate(180deg);
}

.faq-chevron {
    transition: transform 0.25s ease;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Animations & Responsive Utilities
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

@media (max-width: 768px) {
    .header-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .keyboard-wrapper {
        padding: 0.85rem;
    }
    
    .kbd-key {
        height: 36px;
        font-size: 0.68rem;
        min-width: 24px;
    }
    
    .kbd-row {
        gap: 3px;
        margin-bottom: 3px;
    }
}