:root {
            --bg-color: #f4f1ea;
            --accent-red: #8b0000;
            --gold-border: #d4a76a;
            --text-dark: #2c2c2c;
            --deep-gold: #c5a059;
            --white: #ffffff;
        }

        body {
            background-color: var(--bg-color) !important;
            margin: 0;
            padding: 0;
            font-family: Georgia, serif;
            color: var(--text-dark);
            line-height: 1.8;
        }

        .page-container {
            max-width: 1000px;
            margin: auto;
            padding: 40px 20px;
        }

        .study-card {
            background: var(--white);
            border-radius: 14px;
            overflow: hidden;
            box-shadow: 0 8px 28px rgba(0,0,0,0.08);
            border-top: 6px solid var(--accent-red);
            margin-bottom: 45px;
        }

        .study-header {
            background: linear-gradient(135deg, #1a0000, #4a0000);
            padding: 45px 50px 38px;
            text-align: center;
            position: relative;
        }

        .study-header::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 3px;
            background: linear-gradient(to right, transparent, var(--deep-gold), transparent);
        }

        .study-tag {
            display: inline-block;
            color: var(--deep-gold);
            border: 1px solid var(--deep-gold);
            border-radius: 20px;
            padding: 5px 18px;
            font-size: 0.75rem;
            letter-spacing: 2px;
            margin-bottom: 18px;
        }

        .study-header h1 {
            color: #fff;
            margin: 0;
            font-size: clamp(1.7rem, 3.5vw, 2.5rem);
            line-height: 1.25;
        }

        .study-body {
            padding: 45px 50px 50px;
        }

        .study-body p {
            font-size: 1.08rem;
            color: #333;
            margin: 0 0 22px;
            text-align: justify;
        }

        .study-body h2 {
            color: var(--accent-red);
            font-size: 1.45rem;
            margin: 35px 0 14px;
            border-left: 5px solid var(--deep-gold);
            padding-left: 14px;
        }

        .study-highlight {
            background: #fff9f0;
            border-left: 5px solid var(--deep-gold);
            padding: 20px 24px;
            border-radius: 0 10px 10px 0;
            margin: 28px 0;
            color: #444;
        }

        .study-highlight strong {
            color: var(--accent-red);
        }

        .exam-points {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin: 25px 0 30px;
        }

        .exam-point {
            background: var(--bg-color);
            border-radius: 10px;
            padding: 18px;
            border-top: 4px solid var(--accent-red);
        }

        .exam-point h3 {
            margin: 0 0 8px;
            color: var(--accent-red);
            font-size: 1rem;
        }

        .exam-point p {
            margin: 0;
            text-align: left;
            font-size: 0.95rem;
            line-height: 1.65;
            color: #555;
        }

        .question-box {
            background: #f7efe2;
            border: 1px solid var(--gold-border);
            border-radius: 12px;
            padding: 22px 24px;
            margin-top: 30px;
            font-weight: bold;
            color: #4a2d00;
        }

        .registry-section {
            margin-top: 45px;
        }

        .registry-title {
            text-align: center;
            font-size: 2rem;
            color: var(--accent-red);
            margin: 0 0 12px;
        }

        .registry-subtitle {
            max-width: 720px;
            margin: 0 auto 32px;
            text-align: center;
            color: #555;
            font-size: 1rem;
            line-height: 1.7;
        }

        .dossier-list {
            display: grid;
            gap: 18px;
        }

        .dossier-card {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 6px 22px rgba(0,0,0,0.08);
            border: 1px solid rgba(212,167,106,0.45);
            overflow: hidden;
        }

        .dossier-card summary {
            list-style: none;
            cursor: pointer;
        }

        .dossier-card summary::-webkit-details-marker {
            display: none;
        }

        .dossier-summary {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 24px 28px;
            background: linear-gradient(135deg, #fff, #fff8ee);
        }

        .dossier-summary::after {
            content: "⌄";
            margin-left: auto;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent-red);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            transition: 0.25s ease;
            flex: 0 0 auto;
        }

        .dossier-card[open] .dossier-summary::after {
            transform: rotate(180deg);
            background: var(--deep-gold);
        }

        .teacher-avatar {
            width: 74px;
            height: 74px;
            border-radius: 50%;
            background: var(--bg-color);
            border: 2px solid var(--gold-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            flex: 0 0 auto;
        }

        .teacher-main h2 {
            margin: 0 0 5px;
            color: #222;
            font-size: 1.45rem;
            line-height: 1.25;
            border: none;
            padding: 0;
        }

        .teacher-main p {
            margin: 0;
            color: #666;
            font-size: 0.95rem;
            text-align: left;
        }

        .dossier-body {
            padding: 28px;
            border-top: 1px solid #f0e1c8;
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 28px;
        }

        .teacher-contact-box {
            background: var(--bg-color);
            border-radius: 10px;
            padding: 20px;
            text-align: center;
            border-top: 4px solid var(--accent-red);
        }

        .phone-link {
            font-size: 1.2rem;
            color: var(--accent-red);
            font-weight: bold;
            text-decoration: none;
            display: block;
            margin-bottom: 14px;
        }

        .teacher-badge {
            display: inline-block;
            font-size: 0.82rem;
            color: #6b4a14;
            background: #fff3d6;
            border: 1px solid #ecd29b;
            border-radius: 20px;
            padding: 5px 12px;
        }

        .teaching-content {
            display: grid;
            gap: 18px;
        }

        .content-block {
            background: #fff;
            border-left: 4px solid var(--deep-gold);
            padding: 16px 18px;
            border-radius: 0 8px 8px 0;
        }

        .content-block h3 {
            color: var(--accent-red);
            font-size: 1.1rem;
            margin: 0 0 7px;
        }

        .content-block p {
            font-size: 1rem;
            color: #444;
            margin: 0;
            line-height: 1.75;
            text-align: left;
        }

        @media (max-width: 768px) {
            .page-container {
                padding: 25px 14px;
            }

            .study-header {
                padding: 32px 20px;
            }

            .study-body {
                padding: 30px 22px;
            }

            .study-body p {
                text-align: left;
            }

            .exam-points {
                grid-template-columns: 1fr;
            }

            .dossier-summary {
                padding: 20px;
                gap: 14px;
            }

            .teacher-avatar {
                width: 58px;
                height: 58px;
                font-size: 1.6rem;
            }

            .teacher-main h2 {
                font-size: 1.2rem;
            }

            .dossier-body {
                grid-template-columns: 1fr;
                padding: 22px;
            }
        }