/* ===================================
   CSS Variables
   =================================== */

:root {
    /* Colors - Velocity Racing Theme */
    --color-bg: #0d1117;
    --color-bg-light: #161b22;
    --color-bg-card: #1c2128;

    /* Electric Colors */
    --color-electric-blue: #0080ff;
    --color-electric-cyan: #00d4ff;
    --color-velocity-yellow: #ffed4e;
    --color-speed-orange: #ff6b35;
    --color-success: #00ff88;
    --color-error: #ff4757;

    /* Text Colors */
    --color-text: #ffffff;
    --color-text-dim: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.5);

    /* Typography */
    --font-display: 'Rajdhani', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Effects */
    --glow-blue: 0 0 20px rgba(0, 128, 255, 0.5), 0 0 40px rgba(0, 128, 255, 0.3);
    --glow-yellow: 0 0 20px rgba(255, 237, 78, 0.5), 0 0 40px rgba(255, 237, 78, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   Global Styles
   =================================== */

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

body {
    font-family: var(--font-display);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ===================================
   Background Effects
   =================================== */

/* Velocity Background */
.bg-velocity {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
        circle at 50% 50%,
        rgba(0, 128, 255, 0.1),
        transparent 70%
    );
    z-index: 0;
    animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

/* Speed Lines */
.speed-lines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 100px,
        rgba(0, 212, 255, 0.05) 100px,
        rgba(0, 212, 255, 0.05) 102px
    );
    z-index: 0;
    animation: speedMove 2s linear infinite;
}

@keyframes speedMove {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(102px);
    }
}

/* ===================================
   Container
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

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

.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: slideDown 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo {
    display: inline-block;
}

.logo-icon {
    font-size: 5rem;
    animation: electricPulse 1.5s ease-in-out infinite;
    display: inline-block;
    filter: drop-shadow(0 0 20px var(--color-velocity-yellow));
}

.logo-text h1 {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-electric-blue), var(--color-electric-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5rem;
    margin: var(--spacing-sm) 0;
    text-shadow: var(--glow-blue);
    animation: titleSlide 1s ease-out;
}

.subtitle {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-velocity-yellow);
    text-transform: uppercase;
    letter-spacing: 0.3rem;
    text-shadow: var(--glow-yellow);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes electricPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 20px var(--color-velocity-yellow));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 40px var(--color-velocity-yellow));
    }
}

@keyframes titleSlide {
    from {
        letter-spacing: 2rem;
        opacity: 0;
    }
    to {
        letter-spacing: 0.5rem;
        opacity: 1;
    }
}

/* ===================================
   Dashboard Stats
   =================================== */

.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.stat-card {
    background: var(--color-bg-card);
    border: 2px solid var(--color-electric-blue);
    border-radius: 16px;
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.3),
        inset 0 0 40px rgba(0, 128, 255, 0.1);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(0, 212, 255, 0.2),
        transparent
    );
    transition: left 0.5s ease;
}

.stat-card:hover::before {
    left: 100%;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-electric-cyan);
    box-shadow:
        0 8px 30px rgba(0, 128, 255, 0.4),
        inset 0 0 60px rgba(0, 212, 255, 0.2);
}

.stat-icon {
    font-size: 3rem;
    color: var(--color-electric-cyan);
    text-shadow: var(--glow-blue);
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-velocity-yellow);
    line-height: 1;
    text-shadow: var(--glow-yellow);
    font-family: var(--font-mono);
}

.stat-unit {
    font-size: 1.5rem;
    color: var(--color-text-muted);
}

/* ===================================
   Test Section
   =================================== */

.test-section {
    background: var(--color-bg-card);
    border: 2px solid var(--color-electric-blue);
    border-radius: 20px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow:
        0 8px 40px rgba(0, 0, 0, 0.4),
        inset 0 0 60px rgba(0, 128, 255, 0.05);
    animation: fadeInUp 1.2s ease-out 0.4s backwards;
}

/* Text Display */
.text-display {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    line-height: 2.2;
    color: var(--color-text-dim);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    border: 1px solid rgba(0, 128, 255, 0.3);
    user-select: none;
    min-height: 200px;
}

.text-display .char {
    transition: all 0.1s ease;
    position: relative;
}

.text-display .char.correct {
    color: var(--color-success);
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.text-display .char.incorrect {
    color: var(--color-error);
    text-shadow: 0 0 10px rgba(255, 71, 87, 0.5);
    background: rgba(255, 71, 87, 0.2);
    border-radius: 2px;
}

.text-display .char.current {
    background: var(--color-electric-cyan);
    color: var(--color-bg);
    padding: 0 2px;
    border-radius: 2px;
    animation: cursorBlink 1s ease-in-out infinite;
}

@keyframes cursorBlink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Input Area */
.input-area {
    margin-bottom: var(--spacing-lg);
}

.typing-input {
    width: 100%;
    font-family: var(--font-mono);
    font-size: 1.3rem;
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid var(--color-electric-blue);
    border-radius: 12px;
    color: var(--color-text);
    resize: none;
    min-height: 120px;
    transition: var(--transition);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
}

.typing-input:focus {
    outline: none;
    border-color: var(--color-electric-cyan);
    box-shadow:
        inset 0 2px 10px rgba(0, 0, 0, 0.5),
        0 0 20px rgba(0, 212, 255, 0.4);
}

.typing-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

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

.btn {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-electric-blue), var(--color-electric-cyan));
    color: var(--color-text);
    box-shadow:
        0 4px 20px rgba(0, 128, 255, 0.4),
        0 0 40px rgba(0, 128, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow:
        0 8px 30px rgba(0, 128, 255, 0.6),
        0 0 60px rgba(0, 128, 255, 0.4);
}

.btn-secondary {
    background: var(--color-bg-light);
    color: var(--color-velocity-yellow);
    border: 2px solid var(--color-velocity-yellow);
    box-shadow: 0 0 20px rgba(255, 237, 78, 0.3);
}

.btn-secondary:hover {
    background: var(--color-velocity-yellow);
    color: var(--color-bg);
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(255, 237, 78, 0.6);
}

.btn.hidden {
    display: none;
}

/* ===================================
   Modal
   =================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--color-bg-light);
    border: 3px solid var(--color-electric-cyan);
    border-radius: 24px;
    padding: var(--spacing-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 100px rgba(0, 212, 255, 0.4);
    animation: modalSlideIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.7) translateY(-50px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    background: rgba(255, 71, 87, 0.2);
    border: 2px solid var(--color-error);
    border-radius: 50%;
    color: var(--color-error);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--color-error);
    color: var(--color-text);
    transform: rotate(90deg);
}

.modal-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.modal-title {
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-velocity-yellow), var(--color-speed-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.3rem;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.result-item {
    background: var(--color-bg-card);
    border: 2px solid var(--color-electric-blue);
    border-radius: 12px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
}

.result-item:hover {
    transform: translateY(-4px);
    border-color: var(--color-electric-cyan);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
}

.result-primary {
    grid-column: 1 / -1;
    border-color: var(--color-velocity-yellow);
    box-shadow: 0 0 30px rgba(255, 237, 78, 0.3);
}

.result-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    margin-bottom: var(--spacing-sm);
}

.result-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-velocity-yellow);
    font-family: var(--font-mono);
    text-shadow: var(--glow-yellow);
}

.result-primary .result-value {
    font-size: 4rem;
}

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

/* ===================================
   Instructions
   =================================== */

.instructions {
    background: var(--color-bg-card);
    border: 2px solid rgba(0, 128, 255, 0.3);
    border-radius: 16px;
    padding: var(--spacing-xl);
    animation: fadeInUp 1.4s ease-out 0.6s backwards;
}

.instructions h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-electric-cyan);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.2rem;
    text-transform: uppercase;
}

.instruction-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 128, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(0, 128, 255, 0.2);
    transition: var(--transition);
}

.instruction-item:hover {
    background: rgba(0, 128, 255, 0.1);
    border-color: rgba(0, 128, 255, 0.4);
    transform: translateX(8px);
}

.instruction-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-electric-blue), var(--color-electric-cyan));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

.instruction-item p {
    font-size: 1rem;
    color: var(--color-text-dim);
    line-height: 1.5;
}

/* ===================================
   Animations
   =================================== */

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .logo-text h1 {
        font-size: 3rem;
        letter-spacing: 0.3rem;
    }

    .subtitle {
        font-size: 0.9rem;
        letter-spacing: 0.2rem;
    }

    .dashboard {
        grid-template-columns: 1fr;
    }

    .stat-value {
        font-size: 2.5rem;
    }

    .text-display {
        font-size: 1.2rem;
        line-height: 2;
        padding: var(--spacing-md);
    }

    .typing-input {
        font-size: 1.1rem;
        min-height: 100px;
    }

    .btn {
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .result-value {
        font-size: 2.5rem;
    }

    .result-primary .result-value {
        font-size: 3.5rem;
    }

    .instruction-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo-text h1 {
        font-size: 2.5rem;
    }

    .modal-content {
        padding: var(--spacing-md);
    }

    .modal-title {
        font-size: 2rem;
    }
}