:root {
        --bg-dark: #0f172a;
        --card-bg: #1e293b;
        --accent-blue: #3b82f6;
        --accent-emerald: #10b981;
        --text-light: #f8fafc;
        --text-muted: #94a3b8;
    }

    body {
        background-color: var(--bg-dark);
        color: var(--text-light);
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        margin: 0;
        padding: 0;
    }

    .container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 20px;
    }

    .studio-layout {
        display: grid;
        grid-template-columns: 480px 1fr;
        gap: 30px;
        margin-top: 20px;
    }

    @media (max-width: 1024px) {
        .studio-layout {
            grid-template-columns: 1fr;
        }
    }

    /* Sol Panel */
    .editor-panel {
        background-color: var(--card-bg);
        border: 1px solid #334155;
        border-radius: 12px;
        padding: 25px;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
        height: 85vh;
        overflow-y: auto;
    }

    .section-block {
        border-bottom: 1px solid #334155;
        padding-bottom: 20px;
        margin-bottom: 20px;
    }

    .section-block h3 {
        margin: 0 0 15px 0;
        font-size: 14px;
        color: var(--accent-blue);
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

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

    .form-group label {
        display: block;
        font-size: 11px;
        font-weight: bold;
        color: var(--text-muted);
        margin-bottom: 6px;
    }

    .form-group input, .form-group textarea {
        width: 100%;
        padding: 10px 12px;
        background-color: var(--bg-dark);
        border: 1px solid #475569;
        border-radius: 6px;
        color: var(--text-light);
        font-size: 13.5px;
        box-sizing: border-box;
    }

    .form-group input:focus, .form-group textarea:focus {
        border-color: var(--accent-blue);
        outline: none;
    }

    /* Dinamik Paylaşım Kartı Düzenleyicisi */
    .portfolio-item-card {
        background-color: var(--bg-dark);
        border: 1px solid #334155;
        border-radius: 8px;
        padding: 15px;
        margin-bottom: 12px;
    }

    .portfolio-item-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 10px;
        border-bottom: 1px dashed #334155;
        padding-bottom: 8px;
    }

    .portfolio-item-header span {
        font-size: 12px;
        font-weight: bold;
        color: var(--accent-emerald);
    }

    .btn-delete {
        background: #ef4444;
        color: white;
        border: none;
        padding: 4px 8px;
        border-radius: 4px;
        font-size: 11px;
        cursor: pointer;
    }

    .btn-action {
        width: 100%;
        padding: 14px;
        border: none;
        border-radius: 6px;
        font-weight: bold;
        font-size: 14px;
        cursor: pointer;
        margin-bottom: 12px;
        transition: opacity 0.2s;
        text-transform: uppercase;
    }

    .btn-emerald { background: linear-gradient(45deg, #10b981, #059669); color: white; }
    .btn-blue { background: linear-gradient(45deg, #3b82f6, #1d4ed8); color: white; }

    /* Sağ Canlı Önizleme */
    .preview-panel {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .device-switcher {
        display: flex;
        gap: 10px;
        margin-bottom: 15px;
        background-color: var(--card-bg);
        padding: 6px;
        border-radius: 8px;
        border: 1px solid #334155;
    }

    .switch-btn {
        padding: 8px 16px;
        background: none;
        border: none;
        color: var(--text-muted);
        cursor: pointer;
        font-weight: 600;
        font-size: 13px;
        border-radius: 6px;
    }

    .switch-btn.active {
        background-color: var(--accent-blue);
        color: white;
    }

    .preview-viewport {
        border: 4px solid #334155;
        border-radius: 16px;
        overflow: hidden;
        background-color: #000;
        transition: width 0.3s ease;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }

    .viewport-mobile { width: 360px; height: 680px; }
    .viewport-tablet { width: 640px; height: 800px; }
    .viewport-pc { width: 100%; min-height: 700px; }

    .preview-iframe-wrapper {
        width: 100%;
        height: 100%;
        background-color: var(--bg-dark);
    }

    .guide-section {
        margin-top: 40px;
        background-color: rgba(30, 41, 59, 0.5);
        border: 1px dashed #475569;
        border-radius: 12px;
        padding: 25px;
    }

    .guide-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        margin-top: 15px;
    }

    .guide-card {
        background-color: var(--card-bg);
        padding: 15px;
        border-radius: 8px;
        border: 1px solid #334155;
    }

    /* === MOBIL 5-6 INC CİHAZ ESNEKLİK REFORMU === */
    @media (max-width: 480px) {
        .studio-layout {
            grid-template-columns: 1fr !important;
            gap: 15px !important;
        }
        .editor-panel {
            height: auto !important;
            max-height: none !important;
            padding: 15px !important;
        }
        .preview-viewport {
            width: 100% !important;
            max-width: 360px !important;
            height: 580px !important;
        }
        .container {
            padding: 10px !important;
        }
        .btn-action {
            padding: 12px !important;
            font-size: 13px !important;
        }
    }
    
/* --- SAF HTML MİMARİSİ: İZOLE EDİLMİŞ STİLLER --- */
.tss-header-container { text-align: center; margin-bottom: 20px; }
.tss-title { margin: 0; font-size: 26px; background: linear-gradient(45deg, #3b82f6, #10b981); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.tss-subtitle { color: var(--text-muted); margin: 6px 0 0 0; font-size: 13.5px; }
.tss-color-input { height: 38px; cursor: pointer; }
.tss-portfolio-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.tss-portfolio-title { margin: 0; }
.tss-add-btn { background-color: var(--accent-emerald); }
.tss-action-buttons { margin-top: 15px; }
.tss-iframe-borderless { border: none; }
.tss-guide-title { margin-top: 0; color: var(--accent-emerald); }
.tss-guide-desc { font-size: 13.5px; color: var(--text-muted); margin: 0 0 15px 0; }
.tss-guide-step-title { margin: 0 0 8px 0; color: var(--accent-blue); }
.tss-guide-step-desc { margin: 0; font-size: 12.5px; color: var(--text-muted); line-height: 1.5; }

/* --- SAF MİMARİ: AÇIK TEMA (LIGHT MODE) DEĞİŞKEN EZİCİSİ --- */
body.light-theme {
    /* Özel değişkenleri küresel açık tema renkleriyle eziyoruz */
    --bg-dark: #f8fafc !important;
    --card-bg: #ffffff !important;
    --text-light: #0f172a !important; 
    --border-color: #e2e8f0 !important;
}

/* Modüle özel input ve textarea form elemanlarının açık tema uyumu */
body.light-theme input.tss-input-update,
body.light-theme textarea.tss-input-update,
body.light-theme input[type="text"],
body.light-theme input[type="file"],
body.light-theme textarea {
    background-color: #f1f5f9 !important;
    color: #0f172a !important;
    border: 1px solid #cbd5e1 !important;
}

body.light-theme .editor-panel,
body.light-theme .preview-panel,
body.light-theme .guide-card {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* --- SABİT KENARLIKLAR İÇİN AÇIK TEMA EZİCİSİ --- */
body.light-theme .editor-panel,
body.light-theme .section-block,
body.light-theme .portfolio-item-card,
body.light-theme .device-switcher,
body.light-theme .guide-card {
    border-color: #cbd5e1 !important;
}
body.light-theme .portfolio-item-header {
    border-bottom-color: #cbd5e1 !important;
}
body.light-theme .preview-viewport {
    border-color: #94a3b8 !important;
}
body.light-theme .guide-section {
    background-color: #f8fafc !important;
    border-color: #cbd5e1 !important;
}