:root {
    --primary: #4361ee;
    --secondary: #3a0ca3;
    --accent: #f72585;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --warning: #f9c74f;
    --gray: #6c757d;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
    color: var(--light);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 1300px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    margin-top: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    background: linear-gradient(to right, #ff7e5f, #feb47b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.description {
    color: #e0e0e0;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.app-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

.input-section, .output-section {
    background: rgba(255, 255, 255, 0.08);
    padding: 20px;
    border-radius: 15px;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #ff7e5f;
    display: flex;
    align-items: center;
    gap: 10px;
}

textarea {
    width: 100%;
    min-height: 150px;
    background: rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    color: white;
    font-size: 1.1rem;
    resize: vertical;
    margin-bottom: 15px;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

button {
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

button:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

button.secondary {
    background: rgba(255, 255, 255, 0.1);
}

button.secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

button.accent {
    background: var(--accent);
}

button.accent:hover {
    background: #c1121f;
}

.output {
    min-height: 150px;
    background: rgba(0, 0, 0, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    color: white;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

input[type="range"] {
    width: 100%;
}

.visual-output {
    width: 100%;
    height: 80px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.flash {
    width: 100%;
    height: 100%;
    background: var(--warning);
    opacity: 0;
    transition: opacity 0.1s;
}

.learning-section {
    margin-top: 40px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 15px;
}

.morse-table {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.morse-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    border-radius: 8px;
    text-align: center;
}

.char {
    font-size: 1.2rem;
    font-weight: bold;
}

.code {
    font-family: monospace;
    color: var(--warning);
}

footer {
    margin-top: 40px;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.history {
    margin-top: 20px;
}

.history-item {
    background: rgba(0, 0, 0, 0.2);
    padding: 10px;
    border-radius: 8px;
    margin-top: 10px;
    font-size: 0.9rem;
}