/* styles.css - Main stylesheet for MathClub */

/* Web Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&family=Space+Grotesk:wght@400;700&display=swap');

:root {
    --bg-primary: #0b0c16;
    --bg-secondary: #13152c;
    --bg-glass: rgba(23, 26, 54, 0.45);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #f1f3f9;
    --text-secondary: #8b92b6;
    
    --primary: #7c4dff;
    --primary-glow: rgba(124, 77, 255, 0.4);
    --secondary: #00e5ff;
    --secondary-glow: rgba(0, 229, 255, 0.3);
    
    --success: #00e676;
    --success-glow: rgba(0, 230, 118, 0.3);
    --error: #ff1744;
    --error-glow: rgba(255, 23, 68, 0.3);
    --warning: #ffd600;
    --warning-glow: rgba(255, 214, 0, 0.3);
    
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 16px;
}

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

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 10% 10%, rgba(124, 77, 255, 0.15) 0px, transparent 50%),
        radial-gradient(at 90% 90%, rgba(0, 229, 255, 0.12) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(19, 21, 44, 0.5) 0px, transparent 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

/* Header & Navigation */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2.5rem;
    backdrop-filter: blur(12px);
    background: rgba(11, 12, 22, 0.6);
    border-bottom: 1px solid var(--border-glass);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-icon {
    font-size: 2rem;
    font-family: var(--font-heading);
    font-weight: 700;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-btn.active {
    color: var(--text-primary);
    background: var(--bg-glass);
    border-color: var(--border-glass);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sound-toggle-btn, .theme-toggle-btn {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.sound-toggle-btn:hover, .theme-toggle-btn:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

/* Base Layout container */
main {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

/* Glassmorphic Panel Base */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    margin-bottom: 2rem;
}

/* View switcher states */
.view-section {
    display: none;
    animation: fadeIn 0.4s ease-out forwards;
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Welcome / Dashboard Screen */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.hero-banner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
    min-height: 250px;
    background: linear-gradient(135deg, rgba(124, 77, 255, 0.1) 0%, rgba(0, 229, 255, 0.1) 100%);
    position: relative;
    overflow: hidden;
}

.hero-banner::after {
    content: '';
    position: absolute;
    right: -100px;
    bottom: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

.hero-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 2.5rem;
    line-height: 1.2;
}

.hero-title span {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    z-index: 10;
}

.action-btn {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 1rem;
    padding: 0.8rem 1.8rem;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--primary);
    color: var(--text-primary);
    border: none;
    box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

/* Levels Path Visualization */
.levels-header {
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.levels-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
}

.levels-map {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
}

.level-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    padding: 1.5rem;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--text-secondary);
    transition: var(--transition-smooth);
}

.level-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.04);
}

/* Level states */
.level-card.unlocked::before {
    background: var(--primary);
}
.level-card.unlocked:hover {
    box-shadow: 0 8px 20px rgba(124, 77, 255, 0.15);
    border-color: rgba(124, 77, 255, 0.3);
}

.level-card.completed::before {
    background: var(--success);
}
.level-card.completed:hover {
    box-shadow: 0 8px 20px rgba(0, 230, 118, 0.15);
    border-color: rgba(0, 230, 118, 0.3);
}

.level-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
}
.level-card.locked:hover {
    transform: none;
}

.level-num {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.level-card.unlocked .level-num {
    color: var(--secondary);
}

.level-card.completed .level-num {
    color: var(--success);
}

.level-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.level-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
    flex-grow: 1;
}

.level-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.level-score {
    color: var(--warning);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.level-stars {
    color: var(--warning);
    display: flex;
    gap: 0.1rem;
}

/* Sidebar Analytics Preview */
.analytics-preview {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-box-mini {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-box-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.stat-box-val {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.8rem;
}

.color-primary { color: var(--primary); }
.color-secondary { color: var(--secondary); }
.color-success { color: var(--success); }

/* Custom Mode Builder Panel */
.custom-builder {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.custom-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.custom-title-sec {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.operations-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.checkbox-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 0.8rem 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--transition-smooth);
}

.checkbox-card:hover {
    background: rgba(255, 255, 255, 0.05);
}

.checkbox-card input {
    accent-color: var(--primary);
    width: 18px;
    height: 18px;
}

.checkbox-card.selected {
    border-color: var(--primary);
    background: rgba(124, 77, 255, 0.08);
}

.input-slider {
    width: 100%;
    margin-top: 0.5rem;
    accent-color: var(--primary);
}

.slider-val {
    font-weight: 700;
    color: var(--secondary);
}

.gamemode-toggle {
    display: flex;
    gap: 1rem;
}

.gamemode-card {
    flex: 1;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 1rem;
    cursor: pointer;
    text-align: center;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.gamemode-card.selected {
    border-color: var(--secondary);
    background: rgba(0, 229, 255, 0.07);
    box-shadow: 0 4px 15px rgba(0, 229, 255, 0.1);
}

.gamemode-title {
    font-weight: 700;
    font-size: 1.1rem;
}

.gamemode-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Play Screen (Typing Sandbox) */
.game-layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
}

.game-control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 1rem 2rem;
}

.game-info-block {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.info-stat {
    display: flex;
    flex-direction: column;
}

.info-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.info-val {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
}

/* Lives representation */
.lives-container {
    display: flex;
    gap: 0.35rem;
    font-size: 1.5rem;
}

.heart-on {
    color: var(--error);
    filter: drop-shadow(0 0 5px var(--error-glow));
    animation: pulse 1.5s infinite;
}

.heart-off {
    color: rgba(255, 255, 255, 0.1);
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.btn-quit {
    background: rgba(255, 23, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(255, 23, 68, 0.2);
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-quit:hover {
    background: var(--error);
    color: var(--text-primary);
}

/* Question Display and Input Area */
.equation-container {
    position: relative;
    padding: 4rem 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

.equation-box {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    user-select: none;
    -webkit-user-select: none;
}

.typing-value-carrier {
    display: inline-flex;
    align-items: center;
    min-width: 140px;
    height: 90px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 0 1.25rem;
    justify-content: center;
    position: relative;
    transition: var(--transition-smooth);
}

.typing-value-carrier.active {
    border-color: var(--primary);
    background: rgba(124, 77, 255, 0.05);
    box-shadow: 0 0 20px var(--primary-glow);
}

.typing-value-input {
    color: var(--secondary);
    font-weight: 700;
    text-shadow: 0 0 10px var(--secondary-glow);
}

.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 48px;
    background: var(--secondary);
    margin-left: 4px;
    animation: cursorBlink 0.8s infinite;
}

.typing-value-carrier.shake {
    animation: shake 0.2s double ease-in-out;
    border-color: var(--error);
    background: rgba(255, 23, 68, 0.05);
}

@keyframes cursorBlink {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

/* Combo multiplier flyout */
.combo-badge {
    position: absolute;
    top: 1.5rem;
    right: 2rem;
    background: linear-gradient(135deg, var(--warning) 0%, #ff8f00 100%);
    color: #000;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px var(--warning-glow);
    display: none;
    align-items: center;
    gap: 0.35rem;
    transform-origin: center;
    animation: bouncePop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes bouncePop {
    0% { transform: scale(0.3); opacity: 0; }
    70% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* Floating particles layer */
.fx-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

/* On-screen Keyboard Overlay */
.keyboard-section {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1rem;
}

.keyboard-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 1rem;
    text-align: center;
}

.keyboard-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.k-row {
    display: flex;
    gap: 0.5rem;
}

.key-cap {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    user-select: none;
}

.key-cap.wide {
    width: 100px;
}

.key-cap.active {
    background: var(--primary);
    color: var(--text-primary);
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
    transform: scale(0.92);
}

.key-cap.active-success {
    background: var(--success);
    color: var(--text-primary);
    border-color: var(--success);
    box-shadow: 0 0 15px var(--success-glow);
    transform: scale(0.92);
}

.key-cap.active-error {
    background: var(--error);
    color: var(--text-primary);
    border-color: var(--error);
    box-shadow: 0 0 15px var(--error-glow);
    transform: scale(0.92);
}

/* Level Up / Results overlay */
.results-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 12, 22, 0.85);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.results-modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    padding: 3rem;
    max-width: 550px;
    width: 90%;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    text-align: center;
    transform: translateY(30px);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.results-modal.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 2.2rem;
}

.modal-stars {
    font-size: 2.5rem;
    color: var(--warning);
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

.modal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1rem 0;
}

.modal-stat-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 1rem 0.5rem;
}

.modal-stat-lb {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.modal-stat-num {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-top: 0.25rem;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Statistics Page with SVG charts */
.stats-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.chart-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chart-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.chart-canvas-container {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 1.5rem;
    height: 320px;
    position: relative;
    overflow: hidden;
}

.chart-svg {
    width: 100%;
    height: 100%;
}

.grid-line {
    stroke: rgba(255, 255, 255, 0.05);
    stroke-width: 1;
}

.line-chart-path {
    fill: none;
    stroke: var(--secondary);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    filter: drop-shadow(0 0 6px var(--secondary-glow));
}

.chart-dot {
    fill: var(--text-primary);
    stroke: var(--secondary);
    stroke-width: 3;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.chart-dot:hover {
    r: 8;
    fill: var(--secondary);
}

.chart-bar {
    fill: url(#barGrad);
    transition: var(--transition-smooth);
}

.chart-bar:hover {
    fill: var(--primary);
    opacity: 0.8;
}

.axis-text {
    fill: var(--text-secondary);
    font-size: 10px;
    font-family: var(--font-body);
}

.chart-tooltip {
    position: absolute;
    background: rgba(11, 12, 22, 0.95);
    border: 1px solid var(--border-glass);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    pointer-events: none;
    display: none;
    z-index: 50;
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

/* History table */
.history-section {
    margin-top: 3rem;
}

.table-wrapper {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

th {
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-glass);
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

/* Helpers / Responsive design */
.empty-state {
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

@media(max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .custom-builder {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

@media(max-width: 600px) {
    header {
        padding: 1rem 1.25rem;
        flex-direction: column;
        gap: 1rem;
    }
    nav {
        width: 100%;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 5px;
    }
    main {
        padding: 1rem;
    }
    .glass-panel {
        padding: 1.5rem;
    }
    .equation-box {
        font-size: 2.8rem;
    }
    .level-map {
        grid-template-columns: 1fr;
    }
}