@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Playfair+Display:ital,wght@0,500;0,600;0,700;1,600&display=swap');

/* --- THEME: LUXURY INDUSTRIAL --- */
:root {
    /* Colors */
    --bg-body: #050505;
    /* Standardized to #050505 as requested */
    --bg-panel: #111111;
    --bg-tile: #1c1c1e;

    --text-primary: #FFFFFF;
    --text-secondary: #9CA3AF;
    --text-muted: #6e6e73;

    --accent-volt: #CCFF00;
    --accent-b2: #FFB000;
    --accent-level: #FFB000;
    /* Overridden by JS on load */
    --accent-alert: #FF453A;
    --accent-blue: #0A84FF;
    --accent-silver: #E5E5EA;

    --plate-bg: #1F1F1F;
    --plate-border: #333333;
    --border-subtle: #333333;

    /* Spacing & Sizes */
    --header-height: 80px;
}

/* --- BASE STYLES --- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    background-color: var(--bg-body);
    /* Subtle radial gradient as requested to replace blue vignette */
    background-image: radial-gradient(circle at center, #111 0%, #050505 100%);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    /* Ensure overflow-x is hidden, but allow y scrolling if needed */
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    user-select: none;
    min-height: 100vh;
}

/* Typography Overrides */
h1 {
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* UTILITIES */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-start {
    justify-content: flex-start;
}

.flex-grow {
    flex-grow: 1;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-4 {
    gap: 1rem;
}

.w-full {
    width: 100%;
}

.h-screen {
    height: 100vh;
}

.min-h-screen {
    min-height: 100vh;
}

.p-6 {
    padding: 1.5rem;
}

.p-10 {
    padding: 2.5rem;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.relative {
    position: relative;
}

.text-center {
    text-align: center;
}

/* FIX: Reserve vertical space so barbell track never shifts. */
.question-area {
    min-height: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mb-10 {
    margin-bottom: 2.5rem;
}

.mt-8 {
    margin-top: 2rem;
}

.uppercase {
    text-transform: uppercase;
}

.text-volt {
    color: var(--accent-level);
}

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

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



.academic-text {
    font-family: 'Playfair Display', serif;
    font-weight: 500;
    letter-spacing: -0.01em;
    transition: font-size 0.2s ease;
}

/* Dynamic text sizing to prevent layout shift */
@media (min-width: 768px) {
    .text-size-medium {
        font-size: 2.25rem !important;
    }

    .text-size-small {
        font-size: 1.75rem !important;
    }
}

@media (max-width: 767px) {
    .text-size-medium {
        font-size: 1.5rem !important;
    }

    .text-size-small {
        font-size: 1.25rem !important;
    }
}

/* --- SHARED COMPONENTS --- */

/* 1. HEADER & BRANDING */
.gym-header {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #0a0a0a;
    /* Keeping header slightly lighter than body maybe? Or strict #050505? Leaving as legacy #0a0a0a */
    border-bottom: 1px solid #222;
}

.gym-brand {
    font-size: 1.25rem;
    /* xl */
    font-weight: 800;
    letter-spacing: -0.02em;
    color: white;
}

.gym-brand span {
    color: var(--accent-level);
}

/* 2. PROGRESS DOTS */
.gym-lives-container {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.gym-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 9999px;
    background-color: #333;
    transition: all 0.3s ease;
}

/* Replaces red dots with Volt green that fades to #333 */
.gym-dot.active {
    background-color: var(--accent-level);
    box-shadow: 0 0 10px color-mix(in srgb, var(--accent-level) 50%, transparent);
}

.gym-dot.used {
    /* State for "failed/used" attempts if needed, logic says "fades to #333 on use" */
    background-color: #333;
    box-shadow: none;
}

/* 3. BUTTONS */
.gym-btn {
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-muted);
    padding: 12px 24px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: 30px;
    transition: all 0.2s;
}

.gym-btn:hover {
    border-color: white;
    color: white;
}

.gym-btn.active,
.gym-btn:active {
    background: white;
    color: black;
    border-color: white;
    opacity: 1;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.gym-btn-lift {
    background: white;
    color: black;
    border: 1px solid white;
    font-weight: 900;
    opacity: 0.3;
    cursor: not-allowed;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0);
}

.gym-btn-lift.active {
    opacity: 1;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* 4. OVERLAYS (Center) */
.overlay-center {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 100;
    text-align: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

.overlay-center.visible {
    opacity: 1;
    pointer-events: auto;
}

.spotter-box {
    background: #1a1a1a;
    border: 1px solid var(--accent-alert);
    border-left: 6px solid var(--accent-alert);
    color: white;
    padding: 24px 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9);
    min-width: 320px;
}

.success-box {
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--accent-level);
    padding: 40px 60px;
    border-radius: 8px;
    box-shadow: 0 0 50px color-mix(in srgb, var(--accent-level) 20%, transparent);
    min-width: 400px;
}

/* --- ANIMATIONS --- */
@keyframes tremor {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-6px);
    }

    75% {
        transform: translateX(6px);
    }
}

@keyframes error-shake {

    10%,
    90% {
        transform: translate3d(-1px, 0, 0);
    }

    20%,
    80% {
        transform: translate3d(2px, 0, 0);
    }

    30%,
    50%,
    70% {
        transform: translate3d(-4px, 0, 0);
    }

    40%,
    60% {
        transform: translate3d(4px, 0, 0);
    }
}

@keyframes slam-bar {
    0% {
        transform: scaleY(0.5);
        opacity: 0;
    }

    100% {
        transform: scaleY(1);
        opacity: 1;
    }
}

.shake {
    animation: error-shake 0.4s cubic-bezier(.36, .07, .19, .97) both;
}

.jammed {
    border-color: var(--accent-alert);
    background: rgba(255, 69, 58, 0.15);
    animation: tremor 0.4s ease-in-out;
}

/* --- SPECIFIC COMPONENT: PLATE / TILE --- */
/* RULE: Hover/active ONLY use transform, box-shadow, filter — never layout properties like border-width. */

/* Syntax Gym Plates */
/* Syntax Gym Plates */
/* Syntax Gym Plates */
.plate {
    /* Platinum / Silver - Inventory State */
    background: linear-gradient(180deg, #F9FAFB 0%, #D1D5DB 100%);
    color: #1F2937;
    /* Dark Grey */
    font-family: 'Inter', sans-serif;
    font-weight: 800;
    font-size: 1.25rem;
    padding: 12px 24px;

    /* The Ledge & Structure */
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.8);
    /* Highlight */
    border-bottom: 4px solid #9CA3AF;
    /* Silver Ledge */
    border-radius: 6px;

    /* Shadow */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);

    cursor: pointer;
    min-width: 70px;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    user-select: none;

    /* Transitions */
    will-change: transform, border-color, background;
    transition:
        transform 0.1s cubic-bezier(0.1, 0.9, 0.2, 1),
        border-bottom-width 0.1s,
        border-color 0.2s,
        background 0.2s;
}

/* Level Theme Variables (Don't style directly yet) */
.plate-b2 {
    --plate-theme: #FFB000;
    /* Terminal Amber */
    --plate-border-theme: #8B5A00;
    /* Dark Bronze */
    --plate-text-locked: #1a1a1a;
}

.plate-c1 {
    --plate-theme: #CCFF00;
    /* Volt Green */
    --plate-border-theme: #556B00;
    /* Dark Olive */
    --plate-text-locked: #000000;
}

/* Hover: Hint at the Level Color */
.plate:hover {
    transform: translateY(-2px);
    /* Lift */
    border-bottom-color: var(--plate-theme);
    /* Hint Color */
    filter: brightness(1.05);
}

.plate:active {
    transform: translateY(1px);
    border-bottom-width: 3px;
    filter: brightness(0.95);
}

/* The "Locked" State (On the bar - Activated) */
.plate.locked {
    /* Full Color Activation */
    background: var(--plate-theme) !important;
    border-bottom-color: var(--plate-border-theme) !important;
    color: var(--plate-text-locked) !important;

    /* Sinks down slightly */
    transform: translateY(2px) !important;
    /* Compresses bottom border */
    border-bottom-width: 2px !important;

    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.8) !important;
    cursor: default;
    filter: none !important;
    pointer-events: none;
}

/* Syntax Rack Tiles */
.rack-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    max-width: 800px;
    margin: 0 auto;
}

.tile {
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 5px;
    position: relative;
    font-family: 'Inter', sans-serif;
    font-weight: 800;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: #E5E5E5;
    background: linear-gradient(180deg, #2a2a2a 0%, #1a1a1a 100%);
    border: 1px solid #333;
    border-bottom: 5px solid #000;
    border-top: 1px solid #444;
    border-radius: 4px;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    will-change: transform, box-shadow;
    transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.18s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}

.tile:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow:
        0 12px 25px rgba(0, 0, 0, 0.7),
        0 4px 15px rgba(204, 255, 0, 0.08);
    filter: brightness(1.15);
    color: white;
}

.tile:active {
    transform: translateY(1px) scale(0.97);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
    filter: brightness(0.85);
    transition-duration: 0.06s;
}

.tile.selected {
    background: #111;
    border-color: var(--accent-level);
    border-bottom: 5px solid color-mix(in srgb, var(--accent-level) 60%, #000);
    color: var(--accent-level);
    box-shadow: inset 0 0 15px color-mix(in srgb, var(--accent-level) 10%, transparent), 0 5px 15px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

/* Solved Container in Rack */
.solved-container {
    grid-column: span 4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 18px;
    margin-bottom: 6px;
    background: linear-gradient(90deg, #1a1a1a 0%, #111 100%);
    border: 1px solid #333;
    border-left-width: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
    animation: slam-bar 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.solved-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-style: italic;
    font-size: 1.2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    z-index: 2;
}

.solved-list {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    color: #888;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 4px;
    z-index: 2;
}

/* Solved Variants */
.bar-volt {
    border-left-color: #CCFF00;
}

.bar-volt .solved-title {
    color: #CCFF00;
    text-shadow: 0 0 15px rgba(204, 255, 0, 0.4);
}

.bar-blue {
    border-left-color: #007AFF;
}

.bar-blue .solved-title {
    color: #007AFF;
    text-shadow: 0 0 15px rgba(0, 122, 255, 0.4);
}

.bar-silver {
    border-left-color: #E5E5EA;
}

.bar-silver .solved-title {
    color: #E5E5EA;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.bar-alert {
    border-left-color: #FF453A;
}

.bar-alert .solved-title {
    color: #FF453A;
    text-shadow: 0 0 15px rgba(255, 69, 58, 0.4);
}

/* --- RESPONSIVE --- */
@media (max-width: 600px) {
    .tile {
        font-size: 0.85rem;
        border-bottom-width: 3px;
    }

    .rack-grid {
        gap: 8px;
        padding: 10px;
    }
}

/* --- LEVEL TOGGLE SWITCH --- */
.level-toggle {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    gap: 0;
    width: 200px;
    height: 40px;
    background: linear-gradient(180deg, #1a1a1a 0%, #0e0e0e 100%);
    border: 1px solid #333;
    border-bottom: 3px solid #111;
    border-radius: 6px;
    cursor: pointer;
    user-select: none;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}

.level-toggle__label {
    flex: 1;
    text-align: center;
    font-family: 'Inter', sans-serif;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    z-index: 2;
    transition: color 0.2s ease;
    line-height: 40px;
    pointer-events: none;
}

.level-toggle__label--b2 {
    color: var(--accent-b2);
}

.level-toggle__label--c1 {
    color: var(--text-muted);
}

/* Knob — the sliding indicator bar */
.level-toggle__knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: calc(50% - 6px);
    height: calc(100% - 9px);
    /* account for border-bottom */
    background: linear-gradient(180deg, #2a2a2a 0%, #1f1f1f 100%);
    border: 1px solid #444;
    border-radius: 4px;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.6),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.2s ease;
    z-index: 1;
}

/* B2 Active — knob left, amber glow */
.level-toggle .level-toggle__knob {
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.6),
        0 0 12px rgba(255, 176, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* C1 state — knob slides right */
.level-toggle--c1 .level-toggle__knob {
    transform: translateX(calc(100% + 6px));
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.6),
        0 0 12px rgba(204, 255, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.level-toggle--c1 .level-toggle__label--b2 {
    color: var(--text-muted);
}

.level-toggle--c1 .level-toggle__label--c1 {
    color: var(--accent-level);
}

/* Hover feedback */
.level-toggle:hover .level-toggle__knob {
    border-color: #555;
    filter: brightness(1.1);
}

/* Focus for accessibility */
.level-toggle:focus-visible {
    outline: 2px solid var(--accent-level);
    outline-offset: 2px;
}

/* Glow pulse on switch */
@keyframes toggle-glow {
    0% {
        box-shadow: 0 0 0 0 var(--accent-level);
    }

    50% {
        box-shadow: 0 0 20px 4px color-mix(in srgb, var(--accent-level) 40%, transparent);
    }

    100% {
        box-shadow: 0 0 0 0 var(--accent-level);
    }
}

.level-toggle.glow-pulse .level-toggle__knob {
    animation: toggle-glow 0.4s ease-out;
}

/* --- TOGGLE RESPONSIVE --- */
@media (max-width: 600px) {
    .level-toggle {
        width: 160px;
        height: 34px;
    }

    .level-toggle__label {
        font-size: 0.55rem;
        line-height: 34px;
    }

    .level-toggle__knob {
        height: calc(100% - 8px);
    }
}