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

body {
    background: #f8f9fa;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    padding: 80px 1.5rem 2rem;
    margin: 0;
}
.navbar {
    height: 80px !important;
}
.container-main {
    max-width: 1200px;
    width: 100%;
    background: #ffffff;
    border-radius: 2rem;
    padding: 2rem;
    box-shadow: 0 5px 15px 2px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.05);
	margin-top: 20px;
}



h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.5rem 0;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    background-clip: text;
    color: #333;
    text-align: center;
}

.header h1 i {
    color: #0D6EFD;
    margin-right: 10px;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.tool-intro {
    margin-bottom: 1.5rem;
    padding: 0.8rem 1.2rem;
    background: #f0f7ff;
    border-radius: 10px;
    border-left: 4px solid #0D6EFD;
}

.tool-intro p {
    margin: 0;
    color: #475569;
    font-size: 0.95rem;
}

.tool-intro strong {
    color: #0b1a33;
}

.main-layout {
    display: flex;
    gap: 2rem;
    align-items: stretch;
}

/* ===== 左侧控制面板 ===== */
.control-panel {
    flex: 0 0 340px;
    background: #f8f9fa;
    border-radius: 1.5rem;
    padding: 1.5rem;
    border: 1px solid #e9edf4;
}

.panel-title {
    font-weight: 600;
    color: #0b1a33;
    font-size: 1rem;
    margin-bottom: 0.8rem;
    border-bottom: 2px solid #0D6EFD;
    padding-bottom: 0.3rem;
    display: inline-block;
}

/* 按钮组 */
.btn-group-top {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.btn-generate {
    flex: 1;
    padding: 0.7rem 1rem;
    background: #0D6EFD;
    color: white;
    border: none;
    border-radius: 0.8rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-generate:hover {
    background: #0b5ed7;
    transform: scale(1.02);
}

.btn-generate:active {
    transform: scale(0.95);
}

.btn-timer {
    flex: 1;
    padding: 0.7rem 1rem;
    background: #10b981;
    color: white;
    border: none;
    border-radius: 0.8rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-timer:hover {
    background: #059669;
    transform: scale(1.02);
}

.btn-timer:active {
    transform: scale(0.95);
}

.btn-timer.active {
    background: #ef4444;
}

.btn-timer.active:hover {
    background: #dc2626;
}

/* 分隔线 */
.divider {
    border-top: 1px solid #e2e8f0;
    margin: 1rem 0;
}

/* 控制组 */
.control-group {
    margin-bottom: 0.8rem;
}

.control-row {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
}

.control-row label {
    font-size: 0.85rem;
    color: #475569;
    min-width: 70px;
}

.control-input {
    flex: 1;
    padding: 0.5rem 0.8rem;
    border: 1px solid #dce2ec;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    outline: none;
    background: #ffffff;
    color: #0b1a33;
    width: 100%;
}

.control-input:focus {
    border-color: #0D6EFD;
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.1);
}

/* 快捷按钮 */
.quick-btns {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-top: 0.3rem;
}

.quick-btn {
    padding: 0.25rem 0.6rem;
    background: #ffffff;
    border: 1px solid #dce2ec;
    border-radius: 1rem;
    font-size: 0.75rem;
    color: #475569;
    cursor: pointer;
    transition: 0.15s;
}

.quick-btn:hover {
    background: #e9edf4;
    border-color: #0D6EFD;
    color: #0D6EFD;
}

.quick-btn:active {
    transform: scale(0.95);
}

.range-btns .quick-btn {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
}

/* 单选按钮组 */
.radio-group {
    display: flex;
    gap: 1.5rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: #475569;
    cursor: pointer;
}

.radio-option input[type="radio"] {
    width: 16px;
    height: 16px;
    accent-color: #0D6EFD;
    cursor: pointer;
}

/* 计时器状态 */
.timer-status {
    margin-top: 1rem;
    padding: 0.8rem 1rem;
    background: #fef3c7;
    border-radius: 0.8rem;
    border: 1px solid #f59e0b;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.timer-status i {
    color: #f59e0b;
}

.timer-status span {
    color: #92400e;
    font-size: 0.9rem;
    flex: 1;
}

.btn-stop-timer {
    padding: 0.3rem 0.8rem;
    background: #ef4444;
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: 0.15s;
}

.btn-stop-timer:hover {
    background: #dc2626;
}

/* ===== 右侧结果面板 ===== */
.result-panel {
    flex: 1;
    background: #f8f9fa;
    border-radius: 1.5rem;
    padding: 1.5rem;
    border: 1px solid #e9edf4;
    display: flex;
    flex-direction: column;
}

/* 统计栏 */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    background: #ffffff;
    border-radius: 0.8rem;
    padding: 0.6rem 1rem;
    border: 1px solid #e2e8f0;
    margin-bottom: 1rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.85rem;
    justify-content: center;
}

.stat-label {
    color: #94a3b8;
}

.stat-value {
    font-weight: 600;
    color: #0b1a33;
}

/* 结果显示区域 */
.result-container {
    flex: 1;
    background: #ffffff;
    border-radius: 1rem;
    border: 2px solid #e2e8f0;
    min-height: 300px;
    max-height: 450px;
    overflow-y: auto;
    padding: 1rem;
    position: relative;
}

.result-container::-webkit-scrollbar {
    width: 6px;
}

.result-container::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.result-container .placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 250px;
    color: #94a3b8;
}

.result-container .placeholder i {
    font-size: 3.5rem;
    color: #cbd5e1;
    margin-bottom: 0.5rem;
}

.result-container .placeholder span {
    font-size: 0.95rem;
}

.result-container .placeholder .hint {
    font-size: 0.8rem;
    color: #cbd5e1;
    margin-top: 0.3rem;
}

.result-container .result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 0.6rem;
    padding: 0.2rem;
}

.result-container .result-grid .number-item {
    background: #f1f4f9;
    border-radius: 0.5rem;
    padding: 0.5rem 0.3rem;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: #0b1a33;
    font-family: 'Courier New', monospace;
    transition: 0.15s;
    border: 1px solid transparent;
}

.result-container .result-grid .number-item:hover {
    border-color: #0D6EFD;
    background: #f0f4ff;
    transform: scale(1.05);
}

/* 结果操作按钮 */
.result-actions {
    display: flex;
    gap: 0.6rem;
    margin-top: 1rem;
}

.btn-copy {
    flex: 1;
    padding: 0.5rem;
    background: #0D6EFD;
    color: white;
    border: none;
    border-radius: 0.6rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn-copy:hover {
    background: #0b5ed7;
}

.btn-clear {
    flex: 1;
    padding: 0.5rem;
    background: #e9edf4;
    color: #475569;
    border: none;
    border-radius: 0.6rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn-clear:hover {
    background: #dce2ec;
    color: #0b1a33;
}


@media (max-width: 992px) { .d-lg-flex { display: none; } }

/* ===== 响应式 ===== */
@media (max-width: 820px) {
    .main-layout {
        flex-direction: column;
    }
    .control-panel {
        flex: 1;
    }
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 500px) {
    .container-main {
        padding: 1rem;
    }
    .control-panel,
    .result-panel {
        padding: 1rem;
        border-radius: 1rem;
    }
    .header h1 {
        font-size: 1.3rem;
    }
    .header .subtitle {
        display: none;
    }
    .btn-group-top {
        flex-direction: column;
    }
    .stats-bar {
        grid-template-columns: 1fr 1fr;
        gap: 0.3rem;
        padding: 0.4rem 0.6rem;
    }
    .stat-item {
        font-size: 0.75rem;
    }
    .result-container .result-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
    .result-container .result-grid .number-item {
        font-size: 0.9rem;
        padding: 0.3rem 0.2rem;
    }
    .quick-btns {
        gap: 0.3rem;
    }
    .quick-btn {
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
    }
}