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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    animation: fadeInDown 1s ease;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.pyramid-container {
    position: relative;
    background: white;
    border-radius: 20px;
    padding: 40px 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeIn 1.5s ease;
}

.side-label {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 10px 30px;
    font-weight: bold;
    font-size: 0.9rem;
    letter-spacing: 2px;
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.pyramid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px;
}

.level {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 15px;
    border-radius: 10px;
    transition: all 0.3s ease;
    animation: slideUp 0.8s ease backwards;
    position: relative;
}

.level:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.level-title {
    width: 100%;
    text-align: center;
    font-weight: bold;
    font-size: 0.9rem;
    letter-spacing: 1px;
    margin-bottom: 8px;
    color: #333;
}

.skill-item {
    background: rgba(255, 255, 255, 0.9);
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.85rem;
    font-weight: 500;
    border: 2px solid transparent;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.skill-item:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.8);
}

.skill-item:active {
    transform: translateY(0) scale(0.98);
}

/* Level-specific colors */
.level-9 {
    background: linear-gradient(135deg, #fff176 0%, #ffd54f 100%);
    width: 15%;
    animation-delay: 0.1s;
}

.level-8 {
    background: linear-gradient(135deg, #ffeb3b 0%, #fdd835 100%);
    width: 25%;
    animation-delay: 0.2s;
}

.level-7 {
    background: linear-gradient(135deg, #ffee58 0%, #fbc02d 100%);
    width: 35%;
    animation-delay: 0.3s;
}

.level-6 {
    background: linear-gradient(135deg, #fff59d 0%, #f9a825 100%);
    width: 45%;
    animation-delay: 0.4s;
}

.level-5 {
    background: linear-gradient(135deg, #ffe082 0%, #f57f17 100%);
    width: 55%;
    animation-delay: 0.5s;
}

.level-4 {
    background: linear-gradient(135deg, #ffcc80 0%, #ff8a65 100%);
    width: 65%;
    animation-delay: 0.6s;
}

.level-3 {
    background: linear-gradient(135deg, #ffab91 0%, #ff7043 100%);
    width: 75%;
    animation-delay: 0.7s;
}

.level-2 {
    background: linear-gradient(135deg, #ff8a65 0%, #f4511e 100%);
    width: 85%;
    animation-delay: 0.8s;
}

.level-1 {
    background: linear-gradient(135deg, #ff7043 0%, #d84315 100%);
    width: 95%;
    animation-delay: 0.9s;
}

.level-0 {
    background: linear-gradient(135deg, #e53935 0%, #b71c1c 100%);
    width: 100%;
    color: white;
    padding: 20px;
    animation-delay: 1s;
}

.level-0 .level-title {
    color: white;
    font-size: 1rem;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
    margin: 10% auto;
    padding: 30px;
    border-radius: 20px;
    width: 80%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: slideDown 0.4s ease;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 20px;
}

.close:hover,
.close:focus {
    color: #000;
    transform: rotate(90deg);
}

#modalTitle {
    color: #333;
    margin-bottom: 20px;
    font-size: 2rem;
}

#modalBody {
    color: #555;
    line-height: 1.8;
    font-size: 1.1rem;
}

#modalBody ul {
    margin-left: 20px;
    margin-top: 15px;
}

#modalBody li {
    margin-bottom: 10px;
}

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

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

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Responsive design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .pyramid-container {
        padding: 30px 15px;
    }

    .side-label {
        display: none;
    }

    .level {
        padding: 10px;
    }

    .skill-item {
        font-size: 0.75rem;
        padding: 8px 12px;
    }

    .modal-content {
        width: 90%;
        margin: 20% auto;
        padding: 20px;
    }

    #modalTitle {
        font-size: 1.5rem;
    }

    #modalBody {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .level-9, .level-8, .level-7, .level-6,
    .level-5, .level-4, .level-3, .level-2,
    .level-1 {
        width: 100%;
    }

    .skill-item {
        font-size: 0.7rem;
        padding: 6px 10px;
    }
}