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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to bottom, #1a1a2e, #16213e, #0f3460);
    color: white;
    min-height: 100vh;
    padding: 20px;
}

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

.header {
    text-align: center;
    margin-bottom: 40px;
}

.title {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
    font-size: 1.3rem;
    color: #93c5fd;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.control-box {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.control-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
}

.control-select {
    width: 100%;
    padding: 10px;
    background: #1e293b;
    color: white;
    border: 2px solid #60a5fa;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
}

.control-select:focus {
    outline: none;
    border-color: #3b82f6;
}

.form-container {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.form-title {
    font-size: 1.8rem;
    margin-bottom: 25px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

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

.field-label {
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.95rem;
}

.field-input,
.field-select,
.field-textarea {
    padding: 10px;
    background: #1e293b;
    color: white;
    border: 2px solid #60a5fa;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.field-input:focus,
.field-select:focus,
.field-textarea:focus {
    outline: none;
    border-color: #3b82f6;
}

.field-textarea {
    resize: vertical;
    min-height: 60px;
}

.field-full-width {
    grid-column: 1 / -1;
}

.validate-btn {
    width: 100%;
    padding: 15px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

.validate-btn:hover {
    background: #1d4ed8;
}

.validate-btn:active {
    transform: scale(0.98);
}

.result-container {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.hidden {
    display: none !important;
}

.validation-result {
    text-align: center;
    margin-bottom: 30px;
}

.face-icon {
    font-size: 6rem;
    margin-bottom: 20px;
}

.face-happy {
    color: #4ade80;
}

.face-sad {
    color: #f87171;
}

.result-title {
    font-size: 2rem;
    font-weight: bold;
}

.result-title.valid {
    color: #4ade80;
}

.result-title.invalid {
    color: #f87171;
}

.mineral-info {
    background: #1e293b;
    padding: 30px;
    border-radius: 10px;
}

.info-title {
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
}

.info-item {
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 5px;
}

.info-item strong {
    color: #93c5fd;
}

.info-full-width {
    grid-column: 1 / -1;
}

@media (max-width: 768px) {
    .title {
        font-size: 1.8rem;
    }

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

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