/* ========================================
   교학 페이지 - 불교 핵심 교리 시각화
   ======================================== */

:root {
    /* Teaching page colors */
    --teaching-primary: #a794e0;
    --teaching-secondary: #89b8ff;
    --teaching-accent: #9bebb4;
    --teaching-gold: #daa520;
}

/* 페이지 배경 */
.teaching-page {
    min-height: 100vh;
    background: var(--color-background);
}

/* 섹션 */
.teaching-page .section {
    padding: 80px 0;
}

/* 소개 섹션 */
#teaching-intro {
    text-align: center;
    padding: 120px 0 80px;
}

#teaching-intro h1 {
    font-size: clamp(2.5rem, 7vw, 4rem);
    font-weight: 300;
    margin: 0 0 16px;
    background: linear-gradient(120deg, var(--teaching-primary), var(--teaching-gold));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.intro-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin: 24px 0;
}

/* 다이어그램 섹션 */
.diagram-section {
    padding: 60px 0;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 400;
    text-align: center;
    margin: 0 0 12px;
    color: var(--color-text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin: 0 0 60px;
    font-style: italic;
}

/* SVG 다이어그램 컨테이너 */
.diagram-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

.teaching-diagram {
    width: 100%;
    height: auto;
    display: block;
}

/* 사성제 카드 */
.truth-card {
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.truth-card:hover {
    transform: scale(1.03);
}

.truth-card:hover rect {
    filter: drop-shadow(0 8px 24px rgba(167, 148, 224, 0.2));
}

.truth-card:active {
    transform: scale(0.98);
}

/* 카드 텍스트 */
.truth-number {
    font-size: 28px;
    font-weight: 200;
    fill: var(--color-text-secondary);
    opacity: 0.5;
}

.truth-title {
    font-size: 24px;
    font-weight: 600;
    fill: var(--color-text-primary);
    letter-spacing: 0.02em;
}

.truth-subtitle {
    font-size: 16px;
    font-weight: 400;
    fill: var(--color-text-secondary);
    opacity: 0.8;
}

.truth-pali {
    font-size: 14px;
    font-weight: 400;
    fill: var(--color-text-secondary);
    opacity: 0.6;
    font-style: italic;
}

/* 설명 패널 */
.explanation-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.explanation-panel.show {
    display: flex;
    opacity: 1;
}

.panel-content {
    background: var(--color-background);
    border-radius: 24px;
    padding: 40px;
    max-width: 600px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: panelSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes panelSlideIn {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.panel-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 28px;
    color: var(--color-text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.panel-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-text-primary);
}

.panel-content h3 {
    font-size: 1.8rem;
    font-weight: 500;
    margin: 0 0 16px;
    color: var(--teaching-primary);
}

.exp-pali {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--color-text-secondary);
    margin: 0 0 24px;
}

.exp-description {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--color-text-primary);
    margin: 0 0 32px;
    letter-spacing: -0.003em;
}

.exp-source {
    background: rgba(137, 184, 255, 0.1);
    border-left: 3px solid var(--teaching-secondary);
    padding: 16px 20px;
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.exp-source strong {
    color: var(--teaching-secondary);
    font-weight: 600;
}

/* 안내 카드 */
.info-card {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(137, 184, 255, 0.15);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 24px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.info-card h3 {
    font-size: 1.4rem;
    font-weight: 500;
    margin: 0 0 16px;
    color: var(--teaching-primary);
}

.info-card p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-primary);
    margin: 0 0 12px;
}

.info-card p:last-child {
    margin-bottom: 0;
}

.source-detail {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

/* 모바일 최적화 */
@media (max-width: 768px) {
    .teaching-page .section {
        padding: 60px 0;
    }

    #teaching-intro {
        padding: 100px 0 60px;
    }

    .section-title {
        font-size: 2rem;
    }

    .section-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
    }

    .diagram-container {
        padding: 20px 10px;
    }

    /* SVG 텍스트 크기 조정 */
    .truth-number {
        font-size: 20px;
    }

    .truth-title {
        font-size: 16px;
    }

    /* 팔정도 텍스트 크기 조정 */
    .path-number {
        font-size: 18px;
    }

    .path-title {
        font-size: 16px;
    }

    .path-subtitle {
        font-size: 12px;
    }

    .path-pali {
        font-size: 10px;
    }

    .center-label {
        font-size: 16px;
    }

    .center-sublabel {
        font-size: 12px;
    }

    .panel-content {
        padding: 32px 24px;
        max-height: 90vh;
    }

    .panel-content h3 {
        font-size: 1.5rem;
    }

    .exp-description {
        font-size: 1rem;
        line-height: 1.9;
    }

    .info-card {
        padding: 24px;
    }
}

/* 초소형 화면 */
@media (max-width: 428px) {
    .truth-number {
        font-size: 18px;
    }

    .truth-title {
        font-size: 14px;
    }

    .panel-content {
        padding: 24px 20px;
    }

    .exp-pali {
        font-size: 1rem;
    }
}

/* 팔정도 카드 */
.path-card {
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.path-card:hover {
    transform: scale(1.03);
}

.path-card:hover rect {
    filter: drop-shadow(0 8px 24px rgba(167, 148, 224, 0.2));
}

.path-card:active {
    transform: scale(0.98);
}

/* 팔정도 카드 텍스트 */
.path-number {
    font-size: 22px;
    font-weight: 200;
    fill: var(--color-text-secondary);
    opacity: 0.5;
}

.path-title {
    font-size: 20px;
    font-weight: 600;
    fill: var(--color-text-primary);
    letter-spacing: 0.02em;
}

.path-subtitle {
    font-size: 14px;
    font-weight: 400;
    fill: var(--color-text-secondary);
    opacity: 0.8;
}

.path-pali {
    font-size: 12px;
    font-weight: 400;
    fill: var(--color-text-secondary);
    opacity: 0.6;
    font-style: italic;
}

/* 중심 원 라벨 */
.center-label {
    font-size: 20px;
    font-weight: 500;
    fill: var(--color-text-primary);
}

.center-sublabel {
    font-size: 14px;
    font-weight: 400;
    fill: var(--color-text-secondary);
    opacity: 0.7;
}

/* 터치 디바이스 최적화 */
@media (hover: none) and (pointer: coarse) {
    .truth-card:hover rect {
        fill-opacity: 0.2;
        stroke-width: 2;
    }

    .truth-card:active rect {
        fill-opacity: 0.4;
        stroke-width: 3;
    }

    .path-card:hover rect {
        fill-opacity: 0.2;
        stroke-width: 2;
    }

    .path-card:active rect {
        fill-opacity: 0.4;
        stroke-width: 3;
    }
}

/* 접근성: 감소된 모션 */
@media (prefers-reduced-motion: reduce) {
    .truth-card,
    .path-card,
    .connection-line,
    .panel-content {
        transition-duration: 0.1s;
    }

    .connection-cycle {
        animation: none;
    }

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