/* ==========================================================
   CSS Variables & Reset
   ========================================================== */

:root {
    --bg-deep: #0d1525;
    --bg1: #111827;
    --bg2: #151e2e;
    --panel: #1a2438;
    --panel-mid: #1e2a40;
    --panel-inset: #0f1929;
    --line: #2a3a52;
    --line-soft: #1e2d42;
    --text: #c8daf0;
    --text-head: #e2eeff;
    --muted: #4a6080;
    --blue: #38bdf8;
    --blue-bright: #0ea5e9;
    --blue-dim: #1e6fa8;
    --green: #10b981;
    --green-dim: #065f46;
    --amber: #f59e0b;
    --red: #f87171;
    --purple: #a78bfa;
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.45);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --transition: all 0.2s ease;
    --transition-fast: all 0.15s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100vh;
    background: var(--bg-deep);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================
   Header
   ========================================================== */

.mz-header {
    background: linear-gradient(135deg, var(--panel-inset), var(--bg2));
    border-bottom: 1px solid var(--line);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.mz-header-content {
    max-width: 1600px;
    margin: 0 auto;
}

.mz-title {
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: 3px;
    color: var(--text-head);
    text-transform: uppercase;
    margin-bottom: 8px;
    text-shadow: 0 2px 12px rgba(56, 189, 248, 0.3);
}

.mz-subtitle {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--muted);
    letter-spacing: 4px;
    text-transform: uppercase;
}

/* ==========================================================
   Main Layout
   ========================================================== */

.mz-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-columns: 320px 1fr 380px;
    gap: 20px;
    align-items: start;
}

@media (max-width: 1400px) {
    .mz-container {
        grid-template-columns: 280px 1fr 340px;
        gap: 16px;
    }
}

@media (max-width: 1024px) {
    .mz-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

.mz-panel {
    display: flex;
    flex-direction: column;
}

/* ==========================================================
   Cards
   ========================================================== */

.mz-card {
    background: linear-gradient(180deg, var(--panel) 0%, var(--panel-mid) 100%);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
}

.mz-section {
    margin-bottom: 20px;
}

.mz-section:last-child {
    margin-bottom: 0;
}

.mz-section-title {
    font-size: 0.75rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.mz-section-title-sm {
    font-size: 0.7rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 10px;
}

/* ==========================================================
   Buttons
   ========================================================== */

.mz-button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.mz-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 56px;
    padding: 12px 20px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: linear-gradient(180deg, var(--panel-mid), var(--panel-inset));
    color: var(--text-head);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.mz-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    border-color: var(--blue-dim);
}

.mz-btn:active:not(:disabled) {
    transform: translateY(0);
}

.mz-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.mz-btn-primary {
    background: linear-gradient(135deg, var(--blue-bright), var(--blue-dim));
    border-color: var(--blue-dim);
}

.mz-btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #0284c7, #1e6fa8);
    box-shadow: 0 6px 24px rgba(14, 165, 233, 0.4);
}

.btn-icon {
    font-size: 1.2rem;
}

/* ==========================================================
   Level Selection
   ========================================================== */

.level-selector-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.level-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text);
}

.level-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--text-head);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2338bdf8' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.level-select:hover {
    border-color: var(--blue-dim);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.1);
}

.level-select:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

/* ==========================================================
   Direction Pad
   ========================================================== */

.mz-hint {
    font-size: 0.7rem;
    color: var(--muted);
    text-align: center;
    margin-bottom: 10px;
    font-weight: 600;
}

.dpad {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 12px;
}

.dpad-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
    align-items: center;
}

.dpad-slot {
    height: 72px;
    border-radius: 18px;
    border: 1px dashed var(--line-soft);
    background: var(--bg-deep);
}

.dpad-core {
    height: 72px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: var(--panel);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 2rem;
    font-weight: 900;
}

.dpad-btn {
    height: 72px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: linear-gradient(180deg, var(--panel-mid), var(--panel-inset));
    color: var(--blue);
    font-size: 1.8rem;
    font-weight: 900;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dpad-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.3);
    border-color: var(--blue);
    background: linear-gradient(180deg, var(--panel), var(--panel-mid));
}

.dpad-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.dpad-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.dpad-btn.active {
    background: var(--blue);
    color: white;
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}

/* ==========================================================
   Status Box
   ========================================================== */

.status-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 14px;
    min-height: 56px;
    font-size: 0.85rem;
    font-weight: 700;
    line-height: 1.4;
}

.status-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* ==========================================================
   Game Board
   ========================================================== */

.mz-board-card {
    min-height: 680px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.game-board {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    min-height: 600px;
}

.board-placeholder {
    text-align: center;
    color: var(--muted);
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.6;
}

.board-placeholder p {
    font-size: 1.1rem;
    font-weight: 700;
}

.board-grid {
    display: inline-block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.board-row {
    display: flex;
    gap: 6px;
    margin-bottom: 6px;
}

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

.board-cell {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

/* Cell Types */
.cell-wall {
    background: linear-gradient(135deg, #2563a8, #1a4a80);
    border: 1px solid #1d3d6e;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

.cell-path {
    background: linear-gradient(180deg, #1e2d42, #192638);
    border: 1px solid #253548;
}

.cell-exit {
    background: linear-gradient(180deg, #0a2a1e, #052016);
    border: 1px solid #0d5c38;
}

.cell-exit::before {
    content: '';
    width: 20px;
    height: 20px;
    transform: rotate(45deg);
    background: var(--green);
    border-radius: 3px;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.6);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: rotate(45deg) scale(1);
    }
    50% {
        opacity: 0.7;
        transform: rotate(45deg) scale(0.95);
    }
}

.cell-agent {
    background: linear-gradient(180deg, #1e2d42, #192638);
    border: 1px solid #253548;
}

.cell-agent::before {
    content: '';
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: radial-gradient(circle, #ffffff, #70c2ff, #2f8fff);
    box-shadow: 0 0 16px rgba(47, 143, 255, 0.6);
    animation: glow 1.5s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 16px rgba(47, 143, 255, 0.6);
    }
    50% {
        box-shadow: 0 0 24px rgba(47, 143, 255, 0.8);
    }
}

.cell-agent-exit {
    background: linear-gradient(180deg, #0a2a1e, #052016);
    border: 1px solid #0d5c38;
}

.cell-agent-exit::before {
    content: '';
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: radial-gradient(circle, #ffffff, #70c2ff, #2f8fff);
    box-shadow: 0 0 12px rgba(47, 143, 255, 0.5);
}

/* ==========================================================
   Solved Banner
   ========================================================== */

.solved-banner {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 24px;
    animation: slideUp 0.5s ease;
}

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

.solved-content {
    padding: 16px 32px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--green), #059669);
    color: white;
    font-size: 1.3rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4);
    text-align: center;
    animation: celebrate 0.6s ease;
}

@keyframes celebrate {
    0% {
        transform: scale(0.8) rotate(-5deg);
    }
    50% {
        transform: scale(1.1) rotate(5deg);
    }
    100% {
        transform: scale(1) rotate(0deg);
    }
}

/* ==========================================================
   Telemetry Panel
   ========================================================== */

.telemetry-title {
    font-size: 1rem;
    font-weight: 900;
    color: var(--text-head);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 12px;
}

.stat-item {
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-item:first-child {
    grid-column: 1 / -1;
}

.stat-label {
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-head);
}

.stat-status {
    color: var(--blue);
}

.stat-status.solved {
    color: var(--green);
}

/* ==========================================================
   Rewards Panel
   ========================================================== */

.rewards-panel {
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 14px;
    margin-top: 12px;
}

.reward-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.reward-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.reward-label {
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.reward-value {
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 0.02em;
}

.reward-total {
    color: var(--green);
}

.reward-total.negative {
    color: var(--red);
}

.reward-step {
    font-size: 1.4rem;
}

.reward-step.positive {
    color: var(--green);
}

.reward-step.negative {
    color: var(--red);
}

.reward-step.zero {
    color: var(--muted);
}

.reward-history-label {
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.reward-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.reward-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 800;
    background: var(--panel);
    border: 1px solid var(--line);
}

.reward-chip.positive {
    color: var(--green);
}

.reward-chip.negative {
    color: var(--red);
}

.reward-chip.zero {
    color: var(--muted);
}

/* ==========================================================
   Observation Panel
   ========================================================== */

.obs-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.obs-item {
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    display: grid;
    grid-template-columns: 40% 60%;
    gap: 8px;
    align-items: center;
}

.obs-label {
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.obs-value {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text);
    word-break: break-word;
}

.obs-code {
    font-family: ui-monospace, 'Courier New', monospace;
    color: var(--blue);
    font-weight: 800;
}

/* Message Box */
.message-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--panel-inset);
    border: 1px solid var(--line);
    border-radius: 12px;
    margin-bottom: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    line-height: 1.4;
    animation: slideIn 0.3s ease;
}

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

.message-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

/* ==========================================================
   Move History
   ========================================================== */

.move-history {
    margin-top: 12px;
}

.move-history-header {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 8px;
}

.move-history-label {
    font-size: 0.65rem;
    font-weight: 900;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.move-history-note {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--blue-dim);
}

.move-history-count {
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--muted);
}

.move-chips-wrapper {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    height: 40px;
    scrollbar-width: thin;
    scrollbar-color: var(--line) transparent;
}

.move-chips-wrapper::-webkit-scrollbar {
    height: 4px;
}

.move-chips-wrapper::-webkit-scrollbar-track {
    background: transparent;
}

.move-chips-wrapper::-webkit-scrollbar-thumb {
    background: var(--line);
    border-radius: 99px;
}

.move-chips {
    display: inline-flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 6px;
    align-items: center;
    height: 32px;
    padding: 0 2px;
}

.move-chip {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    white-space: nowrap;
    border: 1px solid var(--line);
    background: var(--panel-inset);
    color: var(--blue);
}

.move-chip.old {
    color: var(--muted);
    background: var(--bg-deep);
    border-color: var(--line-soft);
}

.move-placeholder {
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 700;
}

/* ==========================================================
   Loading Overlay
   ========================================================== */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(13, 21, 37, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--line);
    border-top-color: var(--blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==========================================================
   Utilities & Responsive
   ========================================================== */

@media (max-width: 768px) {
    .mz-title {
        font-size: 1.8rem;
    }

    .mz-subtitle {
        font-size: 0.7rem;
    }

    .mz-container {
        padding: 16px;
    }

    .board-cell {
        width: 40px;
        height: 40px;
    }
}