/* ========================================
   MEMORY TREE - Clean Circuit Theme
   ======================================== */

:root {
    --bg-black: #0a0a0a;
    --bg-dark: #0d1117;
    --grid-color: #1a2332;
    --phosphor-green: #00FF41;
    --glow-green: #00ff4180;
    --dim-green: #00aa2a;
    --dark-green: #003d10;
    --circuit-blue: #00D9FF;
    --glow-blue: #00d9ff80;
    --retro-red: #FF0040;
    --glow-red: #ff004080;
    --card-bg: #001408;
    --card-border: #00aa2a;
    --font-mono: 'Courier New', Courier, monospace;
}

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

html, body {
    height: 100%;
    background-color: var(--bg-black);
    color: var(--phosphor-green);
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.5;
}

#app {
    min-height: 100%;
    position: relative;
    overflow-x: hidden;
}

.hidden {
    display: none !important;
}

.dim {
    color: var(--dim-green);
}

/* ========================================
   BACKGROUND - Circuit Board Image (set randomly via JS)
   ======================================== */

body {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

/* ========================================
   LAYOUT
   ======================================== */

.page {
    position: relative;
    z-index: 1;
    animation: fadeIn 0.3s ease-in;
    padding: 1.5rem;
}

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

.container {
    max-width: 600px;
    margin: 0 auto;
    background: #000a05;
    padding: 1.5rem;
    border: 1px solid var(--dim-green);
    box-shadow: 0 0 30px #000000;
}

/* ========================================
   PAGE TITLES
   ======================================== */

.page-title {
    font-size: 1.6rem;
    color: var(--phosphor-green);
    text-align: center;
    letter-spacing: 3px;
    text-shadow: 0 0 20px var(--glow-green);
    margin-bottom: 0.5rem;
}

.page-title.glow {
    animation: title-glow 3s ease-in-out infinite;
}

@keyframes title-glow {
    0%, 100% { text-shadow: 0 0 20px var(--glow-green); }
    50% { text-shadow: 0 0 30px var(--phosphor-green), 0 0 50px var(--glow-green); }
}

/* Header decoration - simple underline */
.header-decoration {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--dark-green);
}

/* Hide the pixel decorations - we don't need them */
.pixel-node,
.pixel-chip,
.pixel-brain,
.pixel-asteroid,
.pixel-tree-logo,
.pixel-empty-tree,
.circuit-decoration,
.circuit-corner {
    display: none;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--phosphor-green);
    background: transparent;
    color: var(--phosphor-green);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.2s;
    min-height: 44px;
}

.btn:hover {
    background: var(--phosphor-green);
    color: var(--bg-black);
    box-shadow: 0 0 15px var(--glow-green);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--dark-green);
}

.btn-secondary {
    border-color: var(--circuit-blue);
    color: var(--circuit-blue);
}

.btn-secondary:hover {
    background: var(--circuit-blue);
    color: var(--bg-black);
    box-shadow: 0 0 15px var(--glow-blue);
}

.btn-danger {
    border-color: var(--retro-red);
    color: var(--retro-red);
}

.btn-danger:hover {
    background: var(--retro-red);
    color: var(--bg-black);
    box-shadow: 0 0 15px var(--glow-red);
}

.btn-large {
    width: 100%;
    padding: 1rem;
    font-size: 14px;
}

.btn-small {
    padding: 0.4rem 0.75rem;
    font-size: 11px;
    min-height: 36px;
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn:disabled:hover {
    background: transparent;
    color: inherit;
    box-shadow: none;
}

/* ========================================
   INPUTS
   ======================================== */

.terminal-input {
    background: #000000;
    border: 1px solid var(--dim-green);
    color: var(--phosphor-green);
    font-family: var(--font-mono);
    font-size: 16px;
    padding: 0.75rem 1rem;
    width: 100%;
    outline: none;
    transition: all 0.2s;
}

.terminal-input:focus {
    border-color: var(--phosphor-green);
    box-shadow: 0 0 10px var(--glow-green);
}

.terminal-input::placeholder {
    color: var(--dim-green);
    opacity: 0.6;
}

/* ========================================
   PASSWORD PAGE
   ======================================== */

.password-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    background: #000a05;
    padding: 2rem;
    max-width: 500px;
    margin: 2rem auto;
    border: 1px solid var(--dim-green);
    box-shadow: 0 0 30px #000000;
}

.terminal-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    border: 1px solid var(--dim-green);
    max-width: 350px;
    width: 100%;
    background: var(--card-bg);
    position: relative;
}

/* Corner indicators */
.terminal-box::before,
.terminal-box::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--circuit-blue);
    box-shadow: 0 0 6px var(--circuit-blue);
}

.terminal-box::before {
    top: 4px;
    left: 4px;
}

.terminal-box::after {
    top: 4px;
    right: 4px;
}

.terminal-box label {
    font-size: 0.85rem;
    letter-spacing: 2px;
    color: var(--dim-green);
}

.error-text {
    color: var(--retro-red);
    font-size: 0.8rem;
    text-shadow: 0 0 10px var(--glow-red);
}

/* ========================================
   HOME PAGE
   ======================================== */

.home-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tree-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tree-card {
    border: 1px solid var(--dim-green);
    padding: 1rem;
    background: var(--card-bg);
    position: relative;
}

/* Corner indicators on cards */
.tree-card::before,
.tree-card::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
}

.tree-card::before {
    top: 4px;
    left: 4px;
    background: var(--circuit-blue);
    box-shadow: 0 0 4px var(--circuit-blue);
}

.tree-card::after {
    top: 4px;
    right: 4px;
    background: var(--phosphor-green);
    box-shadow: 0 0 4px var(--phosphor-green);
}

.tree-card-header {
    margin-bottom: 1rem;
    padding-left: 12px;
}

.tree-card-name {
    font-size: 1rem;
    color: var(--phosphor-green);
}

.tree-card-progress {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.progress-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.75rem;
}

.progress-label {
    width: 75px;
    color: var(--dim-green);
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: #000000;
    border: 1px solid var(--dim-green);
}

.progress-fill {
    height: 100%;
    background: var(--phosphor-green);
    box-shadow: 0 0 6px var(--glow-green);
    position: relative;
}

/* Small indicator at start of progress bar */
.progress-fill::before {
    content: '';
    position: absolute;
    left: 0;
    top: -1px;
    bottom: -1px;
    width: 3px;
    background: var(--phosphor-green);
}

.progress-fill.blue {
    background: var(--circuit-blue);
    box-shadow: 0 0 6px var(--glow-blue);
}

.progress-fill.blue::before {
    background: var(--circuit-blue);
}

.progress-fill.red {
    background: var(--retro-red);
    box-shadow: 0 0 6px var(--glow-red);
}

.progress-fill.red::before {
    background: var(--retro-red);
}

.progress-percent {
    width: 35px;
    text-align: right;
    font-size: 0.7rem;
    color: var(--dim-green);
}

.tree-card-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.no-trees {
    text-align: center;
    padding: 3rem 1rem;
    border: 1px dashed var(--dim-green);
    color: var(--dim-green);
}

/* ========================================
   BUILD TREE PAGE
   ======================================== */

.build-header {
    margin-bottom: 1.5rem;
}

.build-header label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dim-green);
    font-size: 0.85rem;
}

.tree-builder {
    margin-bottom: 2rem;
}

#add-root-child {
    margin-bottom: 1rem;
}

.tree-nodes {
    border-left: 2px solid var(--dim-green);
    padding-left: 1rem;
    margin-left: 0.5rem;
}

.tree-node {
    margin-bottom: 1rem;
    position: relative;
}

.tree-node::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 1rem;
    width: 12px;
    height: 1px;
    background: var(--dim-green);
}

.tree-node::after {
    content: '';
    position: absolute;
    left: -4px;
    top: calc(1rem - 3px);
    width: 6px;
    height: 6px;
    background: var(--phosphor-green);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--phosphor-green);
}

.node-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding-left: 8px;
}

.node-number {
    color: var(--circuit-blue);
    font-weight: bold;
    min-width: 45px;
    font-size: 0.9rem;
}

.node-input {
    flex: 1;
    min-width: 120px;
}

.node-actions {
    display: flex;
    gap: 0.25rem;
}

.node-children {
    border-left: 2px solid var(--dim-green);
    padding-left: 1rem;
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* ========================================
   MEMORISE DASHBOARD
   ======================================== */

.tree-title {
    color: var(--phosphor-green);
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.levels-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.level-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--dim-green);
    font-size: 0.85rem;
    background: var(--card-bg);
}

.level-row.complete {
    border-color: var(--phosphor-green);
    box-shadow: 0 0 8px var(--glow-green);
}

.level-status {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

.level-status.complete {
    color: var(--phosphor-green);
}

.level-status.incomplete {
    color: var(--dim-green);
}

.level-name {
    flex: 1;
}

.level-modes {
    display: flex;
    gap: 0.25rem;
}

.level-info {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--dim-green);
    font-size: 0.85rem;
}

/* ========================================
   LEARN MODE
   ======================================== */

.learn-phase {
    animation: fadeIn 0.3s ease-in;
}

.phase-title {
    text-align: center;
    color: var(--circuit-blue);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.study-items-wrapper {
    position: relative;
    margin-bottom: 1.5rem;
}

.study-items {
    border: 1px solid var(--dim-green);
    padding: 1rem;
    max-height: 50vh;
    overflow-y: auto;
    background: var(--card-bg);
}

.study-item {
    padding: 0.4rem 0;
    border-bottom: 1px solid #003310;
    display: flex;
    gap: 0.75rem;
}

.study-item:last-child {
    border-bottom: none;
}

.study-item-number {
    color: var(--circuit-blue);
    font-weight: bold;
    min-width: 45px;
}

.study-item-label {
    color: var(--phosphor-green);
}

.instruction {
    color: var(--dim-green);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.recall-textarea {
    width: 100%;
    min-height: 200px;
    background: #000000;
    border: 1px solid var(--dim-green);
    color: var(--phosphor-green);
    font-family: var(--font-mono);
    font-size: 16px;
    padding: 1rem;
    resize: vertical;
    margin-bottom: 1rem;
}

.recall-textarea:focus {
    outline: none;
    border-color: var(--phosphor-green);
    box-shadow: 0 0 10px var(--glow-green);
}

.grade-score {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 15px var(--glow-green);
}

.grade-results {
    border: 1px solid var(--dim-green);
    padding: 1rem;
    margin-bottom: 1.5rem;
    max-height: 40vh;
    overflow-y: auto;
    background: var(--card-bg);
}

.result-item {
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    border-left: 3px solid transparent;
}

.result-correct {
    background: #001a08;
    border-left-color: var(--phosphor-green);
}

.result-incorrect {
    background: #1a0008;
    border-left-color: var(--retro-red);
}

.result-expected {
    font-size: 0.85rem;
}

.result-user {
    font-size: 0.75rem;
    color: var(--dim-green);
    margin-top: 0.25rem;
}

.result-user.missing {
    color: var(--retro-red);
}

.result-user-wrong {
    font-size: 0.75rem;
    color: var(--retro-red);
    margin-top: 0.25rem;
}

.grade-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* ========================================
   ASTEROIDS GAME
   ======================================== */

.game-container {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    max-height: 400px;
    border: 2px solid var(--phosphor-green);
    background: var(--bg-black);
    margin-bottom: 1rem;
    box-shadow: 0 0 20px var(--glow-green);
}

#game-canvas {
    width: 100%;
    height: 100%;
}

.game-hud {
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--phosphor-green);
    text-shadow: 0 0 8px var(--phosphor-green);
    pointer-events: none;
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    text-align: center;
}

.game-over-title {
    font-size: 1.8rem;
    color: var(--retro-red);
    text-shadow: 0 0 20px var(--glow-red);
    margin-bottom: 1rem;
}

.final-score {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.game-result {
    margin-bottom: 1.5rem;
}

.game-result.success {
    color: var(--phosphor-green);
}

.game-result.failure {
    color: var(--retro-red);
}

.game-over-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.game-input {
    width: 100%;
    background: #000000;
    border: 1px solid var(--circuit-blue);
    color: var(--phosphor-green);
    font-family: var(--font-mono);
    font-size: 18px;
    padding: 1rem;
    text-align: center;
    outline: none;
}

.game-input:focus {
    box-shadow: 0 0 15px var(--glow-blue);
}

/* Game Study Screen */
.game-study-screen {
    animation: fadeIn 0.3s ease-in;
}

.study-header {
    color: var(--circuit-blue);
    text-align: center;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.game-settings {
    margin: 1.5rem 0;
    padding: 1rem;
    border: 1px solid var(--dim-green);
    background: var(--card-bg);
}

.setting-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

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

.setting-label {
    color: var(--dim-green);
    min-width: 100px;
    font-size: 0.85rem;
}

.number-selector {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.num-btn {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--dim-green);
    background: transparent;
    color: var(--dim-green);
    font-family: var(--font-mono);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.num-btn:hover {
    border-color: var(--phosphor-green);
    color: var(--phosphor-green);
}

.num-btn.selected {
    background: var(--phosphor-green);
    border-color: var(--phosphor-green);
    color: var(--bg-black);
    box-shadow: 0 0 8px var(--glow-green);
}

.game-instruction {
    text-align: center;
    color: var(--phosphor-green);
    font-size: 0.85rem;
    margin: 1rem 0;
    padding: 0.75rem;
    border: 1px solid var(--dim-green);
    background: var(--card-bg);
}

.game-instruction.dim {
    color: var(--dim-green);
}

#back-from-study-btn {
    margin-top: 0.75rem;
}

/* ========================================
   SCROLLBAR
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-black);
}

::-webkit-scrollbar-thumb {
    background: var(--dim-green);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--phosphor-green);
}

/* ========================================
   MOBILE
   ======================================== */

@media (max-width: 480px) {
    .page {
        padding: 1rem;
    }

    .page-title {
        font-size: 1.3rem;
        letter-spacing: 2px;
    }

    .node-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .node-input {
        width: 100%;
    }

    .node-actions {
        width: 100%;
    }

    .tree-card-actions {
        flex-direction: column;
    }

    .tree-card-actions .btn {
        width: 100%;
    }

    .level-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .level-modes {
        width: 100%;
    }

    .level-modes .btn {
        flex: 1;
    }

    .setting-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .num-btn {
        width: 28px;
        height: 28px;
    }

    /* Hide circuit decorations on mobile */
    .circuit-bg::before,
    .circuit-bg::after {
        display: none;
    }
}