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

:root {
    --primary-color: #1a4d2e;
    --secondary-color: #2d6a4f;
    --accent-color: #40916c;
    --forest-green: #52b788;
    --light-green: #95d5b2;
    --sage-green: #b7e4c7;
    --text-color: #2d3436;
    --bg-color: #f1f8f4;
    --card-bg: #ffffff;
    --border-color: #d4e6dc;
    --shadow: 0 2px 10px rgba(26, 77, 46, 0.1);
    --shadow-hover: 0 4px 20px rgba(26, 77, 46, 0.2);
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    background: linear-gradient(135deg, #1a4d2e 0%, #2d6a4f 50%, #40916c 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-color);
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(82, 183, 136, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(149, 213, 178, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(183, 228, 199, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--forest-green);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: var(--shadow-hover);
    font-size: 1rem;
    z-index: 1000;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    pointer-events: none;
    border-left: 4px solid var(--primary-color);
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.notification.error {
    background: #d63031;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    padding: 40px 0;
    position: relative;
}

header h1 {
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: 3px;
    margin-bottom: 10px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4);
    color: #ffffff;
}

.subtitle {
    font-size: 1.2rem;
    font-style: italic;
    opacity: 0.95;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
}

.main-nav {
    margin-top: 20px;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 10px 25px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    display: inline-block;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Random Word Section */
.random-word-section {
    margin-bottom: 50px;
    display: flex;
    justify-content: center;
}

.random-word-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-hover);
    text-align: center;
    max-width: 600px;
    width: 100%;
    transition: transform 0.3s ease;
    border: 2px solid var(--sage-green);
    position: relative;
    overflow: hidden;
}

.random-word-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(82, 183, 136, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.random-word-card:hover {
    transform: translateY(-5px);
    border-color: var(--forest-green);
}

.random-word-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--forest-green);
    margin-bottom: 20px;
    font-weight: 600;
    position: relative;
}

.random-word {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-family: 'Georgia', serif;
}

.random-definition {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 15px;
    line-height: 1.6;
    font-style: italic;
}

.random-example {
    font-size: 1rem;
    color: #555;
    margin-bottom: 25px;
    padding: 15px;
    background: var(--bg-color);
    border-left: 4px solid var(--forest-green);
    border-radius: 5px;
    font-style: italic;
}

.refresh-btn {
    background: var(--forest-green);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    box-shadow: 0 2px 8px rgba(82, 183, 136, 0.3);
}

.refresh-btn:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(45, 106, 79, 0.4);
}

/* Add Word Section */
.add-word-section {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
    border: 2px solid var(--sage-green);
    position: relative;
    overflow: hidden;
}

.add-word-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--forest-green), var(--light-green), var(--forest-green));
}

.add-word-section h2 {
    color: var(--primary-color);
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.word-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group label {
    margin-bottom: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--forest-green);
    box-shadow: 0 0 0 3px rgba(82, 183, 136, 0.1);
}

.submit-btn {
    background: var(--forest-green);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    font-weight: 600;
    align-self: flex-start;
    box-shadow: 0 2px 8px rgba(82, 183, 136, 0.3);
}

.submit-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(45, 106, 79, 0.4);
}

/* Words List Section */
.words-section {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 30px;
    box-shadow: var(--shadow);
    border: 2px solid var(--sage-green);
}

.words-section h2 {
    color: var(--primary-color);
    margin-bottom: 25px;
    font-size: 1.8rem;
}

.words-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.word-card {
    background: var(--bg-color);
    border-radius: 10px;
    padding: 20px;
    border-left: 4px solid var(--forest-green);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.word-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow);
    border-left-color: var(--secondary-color);
    background: #ffffff;
}

.word-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 10px;
    font-family: 'Georgia', serif;
}

.word-card .definition {
    color: var(--text-color);
    margin-bottom: 10px;
    line-height: 1.6;
}

.word-card .example {
    color: #666;
    font-style: italic;
    font-size: 0.9rem;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.loading {
    text-align: center;
    color: #666;
    font-style: italic;
    padding: 40px;
}

.empty-state {
    text-align: center;
    color: #666;
    padding: 40px;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .random-word {
        font-size: 2rem;
    }

    .random-definition {
        font-size: 1.1rem;
    }

    .words-list {
        grid-template-columns: 1fr;
    }
}