/**
 * 공학용 계산기 - 다크 테마 모던 스타일
 * tools-common.css 변수 사용
 */

.scientific-calculator-page .scientific-calculator-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: visible;
    box-shadow: var(--shadow-md);
}

.scientific-calculator-page .scientific-calculator-card .card-body {
    background: transparent;
    border: none;
}

/* 디스플레이 영역 */
.scientific-calculator-page .calculator-display {
    background: #eef0f4;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.scientific-calculator-page .display-info {
    min-height: 28px;
    margin-bottom: var(--spacing-sm);
}

.scientific-calculator-page .memory-indicator,
.scientific-calculator-page .angle-mode-indicator {
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    background: #eef0f4;
    border: 1px solid var(--border-color-light);
    color: var(--text-secondary);
}

.scientific-calculator-page .memory-indicator {
    color: var(--accent-primary-light);
}

.scientific-calculator-page .angle-mode-indicator {
    color: var(--accent-warning);
}

.scientific-calculator-page .expression-display {
    min-height: 1.5rem;
    padding: 0.35rem var(--spacing-lg) 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--text-muted);
    text-align: right;
    word-break: break-all;
    margin-bottom: 0.25rem;
}

.scientific-calculator-page .display-input {
    background: #e9ecf1;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    text-align: right;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    margin-bottom: var(--spacing-md);
}

.scientific-calculator-page .display-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 111, 224, 0.15);
}

.scientific-calculator-page .history-display {
    background: #f2f4f7;
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    max-height: 100px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--text-muted);
    line-height: 1.6;
    border: 1px solid var(--border-color-light);
}

.scientific-calculator-page .history-display::-webkit-scrollbar {
    width: 6px;
}

.scientific-calculator-page .history-display::-webkit-scrollbar-track {
    background: #f1f3f7;
    border-radius: 3px;
}

.scientific-calculator-page .history-display::-webkit-scrollbar-thumb {
    background: var(--border-color-medium);
    border-radius: 3px;
}

/* 판매용 계산기형 레이아웃: 왼쪽 함수·삭제, 오른쪽 숫자패드+연산자 */
.scientific-calculator-page .calc-layout {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    align-items: flex-start;
}

.scientific-calculator-page .calc-functions {
    flex: 1 1 280px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.scientific-calculator-page .calc-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.scientific-calculator-page .calc-row .btn-calc {
    flex: 1 1 0;
    min-width: 42px;
}

.scientific-calculator-page .calc-numpad {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    min-width: 200px;
}

.scientific-calculator-page .numpad-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xs);
}

.scientific-calculator-page .numpad-zero {
    grid-column: span 2;
}

.scientific-calculator-page .numpad-equals-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-xs);
}

.scientific-calculator-page .numpad-equals-row .btn-equals {
    grid-column: 4;
    min-height: 64px !important;
}

/* 버튼 공통 */
.scientific-calculator-page .calculator-buttons .btn-calc {
    height: 48px;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color-light);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.scientific-calculator-page .calculator-buttons .btn-calc:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.scientific-calculator-page .calculator-buttons .btn-calc:active {
    transform: translateY(0);
}

.scientific-calculator-page .calculator-buttons .btn-calc:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(59, 111, 224, 0.3);
}

/* 숫자 버튼 */
.scientific-calculator-page .btn-num {
    background: #eef0f4;
    color: var(--text-primary);
}

.scientific-calculator-page .btn-num:hover {
    background: #e1e5ec;
    color: var(--text-primary);
    border-color: var(--border-color-medium);
}

/* 연산자 버튼 */
.scientific-calculator-page .btn-op {
    background: rgba(59, 111, 224, 0.12);
    color: var(--accent-primary-light);
    border-color: rgba(59, 111, 224, 0.25);
}

.scientific-calculator-page .btn-op:hover {
    background: rgba(59, 111, 224, 0.2);
    color: var(--accent-primary-light);
    border-color: var(--accent-primary);
}

/* = 버튼 */
.scientific-calculator-page .btn-equals {
    min-height: 64px !important;
    height: auto !important;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    font-size: var(--text-lg);
}

.scientific-calculator-page .btn-equals:hover {
    background: linear-gradient(135deg, #2c56b8 0%, #2c56b8 100%);
    color: #fff;
    box-shadow: var(--shadow-glow);
}

/* 과학 함수 버튼 */
.scientific-calculator-page .btn-func {
    background: rgba(16, 185, 129, 0.1);
    color: #1f7a48;
    border-color: rgba(16, 185, 129, 0.3);
}

.scientific-calculator-page .btn-func:hover {
    background: rgba(16, 185, 129, 0.2);
    color: #1f7a48;
    border-color: var(--accent-success);
}

/* 유틸(MS, MR, C, ⌫, .) */
.scientific-calculator-page .btn-util {
    background: #f1f3f7;
    color: var(--text-secondary);
}

.scientific-calculator-page .btn-util:hover {
    background: #e6e9ef;
    color: var(--text-primary);
    border-color: var(--border-color-medium);
}

/* DEG/RAD */
.scientific-calculator-page .btn-mode {
    background: rgba(245, 158, 11, 0.15);
    color: #96521f;
    border-color: rgba(245, 158, 11, 0.35);
}

.scientific-calculator-page .btn-mode:hover {
    background: rgba(245, 158, 11, 0.25);
    color: #96521f;
    border-color: var(--accent-warning);
}

/* AC, C */
.scientific-calculator-page .btn-clear {
    background: rgba(239, 68, 68, 0.15);
    color: #b3372c;
    border-color: rgba(239, 68, 68, 0.35);
}

.scientific-calculator-page .btn-clear:hover {
    background: rgba(239, 68, 68, 0.25);
    color: #b3372c;
    border-color: var(--accent-danger);
}

/* 괄호 */
.scientific-calculator-page .btn-bracket {
    background: rgba(139, 92, 246, 0.12);
    color: #4c3fb0;
    border-color: rgba(139, 92, 246, 0.3);
}

.scientific-calculator-page .btn-bracket:hover {
    background: rgba(139, 92, 246, 0.22);
    color: #4c3fb0;
    border-color: var(--accent-secondary);
}

/* 상수 π, e */
.scientific-calculator-page .btn-const {
    background: rgba(59, 111, 224, 0.12);
    color: #2c56b8;
    border-color: rgba(59, 111, 224, 0.3);
}

.scientific-calculator-page .btn-const:hover {
    background: rgba(59, 111, 224, 0.22);
    color: #2c56b8;
    border-color: var(--accent-primary);
}

/* 사용법 카드 */
.scientific-calculator-page .calculator-help-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.scientific-calculator-page .calculator-help-card .card-header {
    background: #fafbfc;
    border-bottom: 1px solid var(--border-color-light);
    color: var(--text-primary);
}

.scientific-calculator-page .calculator-help-card .card-body {
    color: var(--text-secondary);
}

.scientific-calculator-page .calculator-help-card h6 {
    color: var(--text-primary);
    font-size: var(--text-sm);
}

/* 반응형 */
@media (max-width: 768px) {
    .scientific-calculator-page .calc-layout {
        flex-direction: column;
        align-items: stretch;
    }

    .scientific-calculator-page .calc-numpad {
        min-width: 0;
        max-width: 260px;
        margin: 0 auto;
    }

    .scientific-calculator-page .calculator-buttons .btn-calc {
        height: 44px;
        font-size: 0.8rem;
    }

    .scientific-calculator-page .btn-equals {
        min-height: 60px !important;
    }
}

@media (max-width: 576px) {
    .scientific-calculator-page .calc-row .btn-calc {
        min-width: 36px;
    }

    .scientific-calculator-page .calc-numpad {
        max-width: 100%;
    }

    .scientific-calculator-page .calculator-buttons .btn-calc {
        height: 42px;
        font-size: 0.75rem;
    }

    .scientific-calculator-page .btn-equals {
        min-height: 56px !important;
    }

    .scientific-calculator-page .display-input {
        font-size: 1.5rem;
    }
}