@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@300;400;500;700&family=Noto+Sans+SC:wght@400;500;700&family=Poppins:wght@300;400;600&display=swap');

:root {
    --bg-dark: #0a0c10;
    --accent-blue: #00d2ff;
    --accent-purple: #9d50bb;
    --glass-bg: rgba(255, 255, 255, 0.05);
    /* เพิ่มฟอนต์จีน Noto Sans SC เข้าไปเป็นคิวแรกๆ */
    --font-main: 'Poppins', 'Noto Sans SC', 'Noto Sans Thai', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: #ffffff;
    font-family: var(--font-main) !important;
	font-size: 18px !important;
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top right, #1a2a6c, #0a0c10), radial-gradient(circle at bottom left, #b21f1f, #0a0c10);
}

h2 { font-size: 32px !important; }
h3 { font-size: 26px !important; }
h4 { font-size: 22px !important; }

/* ปลดล็อกความกว้าง UI ให้ใหญ่สะใจ */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 30px;
    width: 100%;
    /* ปรับจากเดิมที่แคบๆ ให้กว้างสุดตามหน้าจอ */
    max-width: 95%; 
    margin: 20px auto;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

/* ขยายช่อง YouTube ให้ใหญ่ขึ้นตามสัดส่วน 16:9 */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 20px;
}
.video-container iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
}

h2 {
    font-size: 28px;
    margin-bottom: 30px;
    background: linear-gradient(to right, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle-input {
    font-size: 18px !important;
    padding: 16px !important;
}

.subtitle-input:focus {
    border-color: var(--accent-blue);
    outline: none;
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.2);
}

.btn-glow {
    background: linear-gradient(45deg, var(--accent-blue), var(--accent-purple));
    border: none;
    color: #fff;
    padding: 18px;
    width: 100%;
    border-radius: 12px;
    font-size: 18px !important;
    padding: 16px 25px !important;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s;
}

.btn-glow:hover {
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.6);
}

/* ระบบไฮไลต์คำศัพท์ศัพท์ (Glossary Highlight) */
.term-highlight {
    color: var(--glossary-highlight);
    border-bottom: 1px dashed var(--glossary-highlight);
    cursor: help;
    position: relative;
}

/* Tooltip แนะนำคำแปล */
.term-highlight::after {
    content: attr(data-translation);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.8);
    border: 1px solid var(--glossary-highlight);
    color: #fff;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.85em;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
}

.term-highlight:hover::after {
    opacity: 1;
    visibility: visible;
}

/* โครงสร้างหน้าแปล (Translation Workspace) */
.workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    height: 85vh;
}

.subtitle-box {
    margin-bottom: 15px;
    padding: 15px;
    background: rgba(255,255,255,0.03);
    border-radius: 8px;
    border-left: 3px solid transparent;
    transition: 0.3s;
}

.subtitle-box.active {
    border-left: 3px solid var(--primary-glow);
    background: rgba(0, 210, 255, 0.05);
}

.subtitle-input {
    width: 100%;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-glass);
    color: white;
    padding: 10px;
    border-radius: 6px;
    font-family: inherit;
    margin-top: 10px;
}
.subtitle-input:focus {
    outline: none;
    border-color: var(--primary-glow);
}
#subtitle-overlay {
            position: absolute;
            bottom: 8%;
            width: 100%;
            text-align: center;
            color: white;
            font-size: 26px;
            font-family: 'Google Sans', 'Noto Sans Thai', sans-serif;
            font-weight: 500;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.9), -2px -2px 4px rgba(0,0,0,0.9);
            pointer-events: none;
            z-index: 10;
            
            /* เพิ่มคำสั่งนี้ เพื่อให้บราวเซอร์อ่านค่า \n แล้วขึ้นบรรทัดใหม่ให้โดยไม่ต้องพึ่ง HTML */
            white-space: pre-wrap; 
        }
		
		/* เมนู Tab สไตล์ทันสมัย */
.tab-container { 
    display: flex; 
    gap: 15px; 
    margin-bottom: 30px; 
    border-bottom: 1px solid var(--border-glass); 
    padding-bottom: 20px; 
}
.tab-btn { 
    background: rgba(255, 255, 255, 0.05); 
    border: 1px solid var(--border-glass); 
    color: #fff; 
    padding: 15px 30px; 
    cursor: pointer; 
    border-radius: 12px; 
font-size: 18px !important;
    padding: 15px 35px !important;
    transition: 0.3s;
}
.tab-btn.active { 
    background: linear-gradient(135deg, #00d2ff, #9d50bb); 
    border: none;
    font-weight: 600;
}
.tab-content { display: none; }

p, div {
    line-height: 1.6;
}