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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 24px;
    position: relative;
}

.form-card, .result-card {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: 100%;
    height: fit-content;
}

.form-card:hover, .result-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.divider {
    width: 100%;
    height: 1px;
    background: #e0e0e0;
    margin: 15px 0 15px 0;
    border: none;
}

.upper-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 12px;
    margin-bottom: 5px;
}

.main-sub-bead {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 8px;
}

.new-bead {
    display: flex;
    align-items: stretch;
    justify-content: center;
    background: #f8f9fa;
    border-radius: 6px;
    min-height: 100px;
    padding: 0 12px;
}

.new-bead .result-item {
    background: none;
    padding: 0;
    margin: auto;
    text-align: center;
}

.lower-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.result-item {
    background: #f8f9fa;
    padding: 5px;
    border-radius: 6px;
    width: 100%;
}

.result-item h3 {
    margin-bottom: 10px;
    color: #2c3e50;
    font-size: 16px;
}

.input-group {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.input-group input {
    min-width: 0;
}

@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }
    .form-card {
        position: static;
        margin-bottom: 16px;
    }
    .result-card {
        padding: 16px;
    }
    .upper-section {
        grid-template-columns: 1fr;
    }
    .lower-section {
        grid-template-columns: 1fr;
    }
    #calculateBtn {
        display: none;
    }
    .mobile-calc-btn {
        display: block;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    .container {
        gap: 10px;
    }
    .form-card, .result-card {
        padding: 10px;
    }
    .result-item {
        padding: 8px;
    }
    .input-group {
        grid-template-columns: 1fr;
    }
    select, input {
        font-size: 16px;
    }
    .divider {
        margin: 2px 0 6px 0;
    }
    #calculateBtn {
        display: none;
    }
    .mobile-calc-btn {
        display: block;
        width: 100%;
    }
}

h2, h3 {
    color: #333;
    margin-bottom: 16px;
}

h2 {
    font-size: 1.5rem;
    border-bottom: 2px solid #eee;
    padding-bottom: 8px;
}

h3 {
    font-size: 1.2rem;
    color: #666;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #555;
}

select, input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.2s ease;
}

select:focus, input:focus {
    outline: none;
    border-color: #4a90e2;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

/* 基础按钮样式 */
button {
    width: 100%;
    padding: 9px;
    background-color: #4a90e2;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #357abd;
}

button:active {
    transform: translateY(1px);
}

.consumption {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.highlight {
    color: #ff0000;
    font-weight: 600;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

.error-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #ff4444;
    color: white;
    padding: 12px 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s;
    z-index: 1000;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* 移动端按钮默认隐藏 */
.mobile-calc-btn {
    display: none;
    margin-top: 12px;
}

/* 移动端适配 */
@media screen and (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .container {
        gap: 10px;
        grid-template-columns: 1fr;
    }
    
    .form-card {
        position: static;
    }
    
    #calculateBtn {
        display: none !important;
    }
    
    .mobile-calc-btn {
        display: block !important;
    }
    
    .form-card, .result-card {
        padding: 15px;
    }
    
    .result-item {
        padding: 10px;
    }
    
    .input-group {
        grid-template-columns: 1fr;
    }
    
    select, input {
        font-size: 16px;
    }
    
    .upper-section {
        grid-template-columns: 1fr;
    }
    
    .lower-section {
        grid-template-columns: 1fr;
    }
}

/* 平板端适配 */
@media screen and (min-width: 481px) and (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .form-card {
        position: static;
    }
    
    #calculateBtn {
        display: block;
    }
    
    .mobile-calc-btn {
        display: none;
    }
}

@media (min-width: 1025px) {
    .form-card, .result-card {
        animation: fadeIn 0.5s ease-out;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}