/* --- CSS VARIABLES & BASE SETUP --- */
:root {
    --sim-bg: #0f172a;
    /* Dark slate */
    --sim-surface: #1e293b;
    /* Darker surface */
    --sim-border: #334155;
    /* Dark border */
    --sim-text: #f8fafc;
    /* White text */
    --sim-text-muted: #94a3b8;
    /* Muted text */
    --sim-primary: #3b82f6;
    --sim-primary-hover: #60a5fa;
    --sim-danger: #ef4444;
    --sim-success: #10b981;
    --sim-radius: 12px;
    --sim-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --sim-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);

    /* Level Colors */
    --clr-ejk: #c44b3f;
    --clr-ice: #2c5282;
    --clr-gaza: #b77b31;
}

body {
    background-color: var(--sim-bg);
    color: var(--sim-text);
    margin: 0;
    padding: 0;
    font-family: var(--font-body), sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* Prevent body scroll in game mode */
}

/* --- SCROLLBARS --- */
.sim-workspace *::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.sim-workspace *::-webkit-scrollbar-track {
    background: transparent;
}

.sim-workspace *::-webkit-scrollbar-thumb {
    background: var(--sim-border);
    border-radius: 10px;
}

.sim-workspace *::-webkit-scrollbar-thumb:hover {
    background: var(--sim-text-muted);
}

/* --- MOBILE LOCKOUT --- */
.simulate-lockout {
    position: fixed;
    inset: 0;
    background: var(--sim-bg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 30px;
}

.simulate-lockout i {
    font-size: 4rem;
    color: var(--sim-text-muted);
    margin-bottom: 20px;
}

.simulate-lockout h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 12px;
}

.simulate-lockout p {
    color: var(--sim-text-muted);
    font-size: 1.1rem;
    max-width: 400px;
    margin-bottom: 30px;
    line-height: 1.6;
}

.simulate-lockout__btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--sim-text);
    color: #fff;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: var(--sim-radius);
    font-weight: 500;
    transition: opacity 0.2s;
}

.simulate-lockout__btn:hover {
    opacity: 0.9;
}

/* Hide lockout on screens larger than 1024px */
@media (min-width: 1024px) {
    .simulate-lockout {
        display: none;
    }
}

/* --- GAME NAV --- */
.sim-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    padding: 0 30px;
    background: var(--sim-surface);
    border-bottom: 1px solid var(--sim-border);
    flex-shrink: 0;
}

.sim-nav__left,
.sim-nav__right {
    flex: 1;
    /* Allow sides to stretch and perfectly center the middle content */
    display: flex;
    align-items: center;
}

.sim-nav__left {
    gap: 20px;
}

.sim-nav__right {
    justify-content: flex-end;
}

.sim-nav__back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--sim-text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.sim-nav__back:hover {
    color: var(--sim-text);
}

.sim-nav__left h1 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-left: 20px;
    border-left: 2px solid var(--sim-border);
}

.sim-nav__left h1 i {
    color: var(--color-accent);
}

.sim-nav__score {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--sim-text);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    font-family: var(--font-body);
}

.sim-nav__score i {
    color: #f59e0b;
}

/* --- MAIN LAYOUT --- */
.sim-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* --- LEVEL SELECTOR --- */
.sim-levels {
    display: flex;
    justify-content: center;
    gap: 12px;
    /* Tighter gap for navbar */
    flex-shrink: 0;
}

.sim-level-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--sim-surface);
    border: 1px solid var(--sim-border);
    border-radius: 30px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--sim-text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.sim-level-btn:hover {
    border-color: var(--sim-text-muted);
}

/* Active States applied dynamically */
.sim-level-btn.active[data-level="ejk"] {
    background: var(--clr-ejk);
    color: #fff;
    border-color: var(--clr-ejk);
}

.sim-level-btn.active[data-level="ice"] {
    background: var(--clr-ice);
    color: #fff;
    border-color: var(--clr-ice);
}

.sim-level-btn.active[data-level="gaza"] {
    background: var(--clr-gaza);
    color: #fff;
    border-color: var(--clr-gaza);
}

/* --- WORKSPACE (SPLIT PANE) --- */
.sim-workspace {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Left Pane: Drawer */
.sim-drawer {
    width: 380px;
    background: var(--sim-bg);
    border-right: 1px solid var(--sim-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sim-drawer__header {
    padding: 16px 20px;
    /* Reduced vertical padding */
    border-bottom: 1px solid var(--sim-border);
}

.sim-drawer__header h3 {
    margin: 0 0 4px 0;
    font-family: var(--font-display);
    font-size: 1.2rem;
}

.sim-drawer__header p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--sim-text-muted);
}

.sim-drawer__scroll {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sim-category-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--sim-text-muted);
    margin-top: 10px;
    margin-bottom: 4px;
    border-bottom: 1px dashed var(--sim-border);
    padding-bottom: 4px;
}

.sim-category-blocks {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

/* Right Pane: Timeline */
.sim-board {
    flex: 1;
    background-color: var(--sim-surface);
    background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 20px 20px;
    display: flex;
    flex-direction: column;
    position: relative;
}

.sim-board__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 30px;
    /* Reduced padding */
    background: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--sim-border);
    z-index: 20;
}

.sim-board__header h3 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.4rem;
    /* Down from 1.6rem */
    color: var(--sim-text);
}

.sim-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--sim-radius);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.sim-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--sim-border);
    color: var(--sim-text-muted);
    box-shadow: none;
}

.sim-btn--primary {
    background: var(--sim-primary);
    color: #fff;
    box-shadow: var(--sim-shadow);
}

.sim-btn--primary:hover:not(:disabled) {
    background: var(--sim-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--sim-shadow-lg);
}

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

.sim-btn--outline:hover {
    border-color: var(--sim-text-muted);
}

.sim-timeline {
    flex: 1;
    overflow-y: auto;
    padding: 40px 30px 60px 30px;
    /* Reduced vertical and horizontal paddings */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    /* Reduced space between phase slots */
}

/* --- DRAGGABLE BLOCKS --- */
.sim-block {
    background: var(--sim-surface);
    border: 2px solid var(--sim-border);
    border-radius: var(--sim-radius);
    padding: 16px;
    cursor: grab;
    user-select: none;
    box-shadow: var(--sim-shadow);
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    font-size: 0.9rem;
    line-height: 1.5;
    position: relative;
    z-index: 10;
    font-family: var(--font-body);
}

.sim-block__badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    color: var(--sim-text-muted);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.sim-block__text {
    color: var(--sim-text);
}

/* Shake Animation for Invalid Drop */
@keyframes sim-shake {

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

    20%,
    60% {
        transform: translateX(-5px);
        border-color: var(--sim-danger);
    }

    40%,
    80% {
        transform: translateX(5px);
        border-color: var(--sim-danger);
    }
}

.sim-block.shake {
    animation: sim-shake 0.4s ease;
    border-color: var(--sim-danger);
}

.sim-block:hover {
    transform: translateY(-2px);
    box-shadow: var(--sim-shadow-lg);
    border-color: var(--sim-text-muted);
}

.sim-block:active {
    cursor: grabbing;
}

.sim-block.is-dragging {
    opacity: 0.5;
    transform: scale(1.05);
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.15);
    z-index: 100;
}

/* Block Types (Subtle visual hints) */
.sim-block[data-type="canon"] {
    border-left: 4px solid var(--sim-primary);
}

.sim-block[data-type="decoy"] {
    border-left: 4px solid var(--color-accent);
}

/* --- TIMELINE SLOTS --- */
.sim-slot-container {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    max-width: 600px;
    position: relative;
}

/* Vertical line connecting the dots */
.sim-slot-container:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 15px;
    /* Magic number aligned with the dot center */
    top: 50px;
    bottom: -30px;
    width: 2px;
    background: var(--sim-border);
    z-index: 0;
}

.sim-slot__marker {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--sim-bg);
    border: 2px solid var(--sim-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--sim-text-muted);
    z-index: 1;
    flex-shrink: 0;
    font-family: var(--font-body);
}

.sim-slot__content {
    flex: 1;
}

.sim-slot__label {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--sim-text-muted);
    margin-bottom: 8px;
    display: block;
}

.sim-slot {
    min-height: 80px;
    background: var(--sim-bg);
    border: 2px dashed var(--sim-border);
    border-radius: var(--sim-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.sim-slot p {
    color: var(--sim-text-muted);
    font-size: 0.85rem;
    pointer-events: none;
}

/* Drag Interaction States */
.sim-slot.drag-over {
    background: rgba(59, 130, 246, 0.05);
    border-color: var(--sim-primary);
    transform: scale(1.02);
}

/* When a block is inside a slot */
.sim-slot .sim-block {
    width: 100%;
    margin: -2px;
    /* Overlap border */
    border-style: solid;
}

.sim-slot.has-block {
    border: none;
    background: transparent;
}

.sim-slot.has-block p {
    display: none;
}

/* Chronological Highlight Animation */
@keyframes sim-pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.5);
        transform: scale(1);
        border-color: var(--sim-primary);
    }

    50% {
        box-shadow: 0 0 20px 10px rgba(59, 130, 246, 0.2);
        transform: scale(1.03);
        border-color: var(--sim-primary-hover);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
        transform: scale(1);
        border-color: var(--sim-border);
    }
}

.sim-block.highlight {
    animation: sim-pulse-glow 1s ease-in-out;
    z-index: 50;
}

.sim-slot__marker.highlight {
    background: var(--sim-primary);
    color: #fff;
    border-color: var(--sim-primary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
    transition: all 0.3s;
}

/* --- INLINE OUTPUT BLOCK --- */
.sim-output {
    width: 100%;
    max-width: 600px;
    background: var(--sim-surface);
    border: 2px solid var(--sim-border);
    border-radius: var(--sim-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--sim-shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 10;
}

.sim-output.show {
    opacity: 1;
    transform: translateY(0);
}

.sim-output.success {
    border-color: var(--sim-success);
}

.sim-output.error {
    border-color: var(--sim-danger);
}

.sim-output__icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.sim-output.success .sim-output__icon {
    color: var(--sim-success);
}

.sim-output.error .sim-output__icon {
    color: var(--sim-danger);
}

.sim-output.mixed .sim-output__icon {
    color: var(--sim-text-muted);
}

.sim-output h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin: 0 0 12px 0;
    color: var(--sim-text);
}

.sim-output p {
    font-size: 1.05rem;
    color: var(--sim-text-muted);
    line-height: 1.6;
    margin: 0 0 24px 0;
}

/* --- TUTORIAL LAUNCHPAD --- */
.sim-tutorial {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.85);
    /* Deep dark blue overlay */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.sim-tutorial.is-active {
    opacity: 1;
    visibility: visible;
}

.sim-tutorial__content {
    background: var(--sim-surface);
    border: 1px solid var(--sim-border);
    border-radius: var(--sim-radius);
    padding: 40px;
    max-width: 600px;
    width: 100%;
    transform: translateY(20px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--sim-shadow-lg);
    color: var(--sim-text);
}

.sim-tutorial.is-active .sim-tutorial__content {
    transform: translateY(0) scale(1);
}

.sim-tutorial__icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.1);
    color: var(--sim-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 24px;
}

.sim-tutorial__content h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin: 0 0 16px 0;
    color: var(--sim-text);
}

.sim-tutorial__content p {
    font-size: 1.05rem;
    color: var(--sim-text-muted);
    line-height: 1.6;
    margin: 0 0 24px 0;
}

.sim-tutorial__list {
    list-style: none;
    padding: 0;
    margin: 0 0 32px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sim-tutorial__list li {
    font-size: 0.95rem;
    color: var(--sim-text-muted);
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: rgba(255, 255, 255, 0.03);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--sim-border);
}

.sim-tutorial__list li i {
    margin-top: 3px;
    font-size: 1.1rem;
}

/* --- RESPONSIVE HEADER TWEAKS --- */
@media (max-width: 1250px) {
    .sim-level-btn span.sim-level-text {
        display: none;
        /* We will need to wrap text in a span if we go this route, or use text-indent. Let's force font-size 0 on the button and reset for the <i> */
    }

    .sim-level-btn {
        font-size: 0;
        padding: 12px;
    }

    .sim-level-btn i {
        font-size: 1.2rem;
        margin: 0;
    }

    .sim-nav__score {
        font-size: 0.9rem;
    }

    .sim-nav__left h1 {
        font-size: 1.2rem;
    }
}