:root {
    --aot-dark: #1a1410;
    --aot-green: #4e6952;
    --aot-brown: #774023;
    --aot-tan: #d88c51;
    --aot-cream: #f3e7c9;
    --aot-light: #fff9f5;
    --aot-red: #d71a1c;
    --text-white: #ffffff;
    --text-gray: #b0b0b0;
    --success: #4a7c59;
    --danger: #c62828;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
     font-family: 'Cinzel', serif;
    background: var(--aot-dark);
    color: var(--text-white);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

/* Background Container */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.bg-video,
.bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
    filter: brightness(0.7);
}

/* Overlay for readability */
.background-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(26, 20, 16, 0.85) 0%,
        rgba(26, 20, 16, 0.75) 50%,
        rgba(26, 20, 16, 0.85) 100%);
    pointer-events: none;
}

.app {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--aot-brown) 0%, var(--aot-dark) 100%);
    padding: 18px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid var(--aot-tan);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.logo {
    font-size: 15px;
    font-weight: 700;
    color: var(--aot-cream);
    letter-spacing: 3px;
    text-transform: uppercase;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.music-btn {
    background: rgba(78, 105, 82, 0.3);
    border: 2px solid var(--aot-green);
    color: var(--aot-cream);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.music-btn:active {
    transform: scale(0.9);
    background: var(--aot-green);
    color: var(--aot-dark);
}

/* Navigation */
.nav {
    background: rgba(26, 20, 16, 0.95);
    display: flex;
    border-bottom: 2px solid var(--aot-brown);
    backdrop-filter: blur(10px);
}

.nav-tab {
    flex: 1;
    padding: 14px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-gray);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.nav-tab.active {
    color: var(--aot-cream);
    border-bottom-color: var(--aot-tan);
    background: rgba(119, 64, 35, 0.2);
}

/* Pages */
.page {
    display: none;
    padding: 24px 20px;
    flex: 1;
}

.page.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

/* Game Page */
.score {
    text-align: center;
    margin-bottom: 20px;
}

.score-label {
    font-size: 11px;
    color: var(--aot-tan);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 8px;
}

.score span {
    font-size: 52px;
    color: var(--aot-red);
    display: block;
    font-weight: 700;
    text-shadow: 0 0 25px rgba(215, 26, 28, 0.6),
                 0 4px 8px rgba(0, 0, 0, 0.5);
    line-height: 1;
}

.vocab-card {
    background: linear-gradient(135deg, 
        rgba(78, 105, 82, 0.15) 0%,
        rgba(119, 64, 35, 0.15) 100%);
    border: 2px solid var(--aot-green);
    border-radius: 12px;
    padding: 50px 24px;
    text-align: center;
    margin-bottom: 24px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.wings-icon {
    position: absolute;
    top: 16px;
    font-size: 24px;
    opacity: 0.3;
    filter: grayscale(1);
}

#vocab-display {
    font-size: 40px;
    font-weight: 700;
    color: var(--aot-cream);
    word-break: break-word;
    letter-spacing: 1px;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.7);
}

.listen-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--aot-tan) 0%, var(--aot-brown) 100%);
    color: var(--aot-dark);
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    margin-bottom: 24px;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 4px 12px rgba(119, 64, 35, 0.4);
}

.listen-btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 6px rgba(119, 64, 35, 0.4);
}

.choices {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 24px;
}

.choice {
    padding: 18px 22px;
    background: linear-gradient(135deg, 
        rgba(78, 105, 82, 0.2) 0%,
        rgba(26, 20, 16, 0.6) 100%);
    border: 2px solid var(--aot-green);
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--aot-cream);
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
    position: relative;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.choice::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 5px;
    height: 100%;
    background: var(--aot-tan);
    border-radius: 10px 0 0 10px;
    transform: scaleY(0);
    transition: transform 0.3s;
}

.choice:active::before {
    transform: scaleY(1);
}

.choice:active {
    background: linear-gradient(135deg, 
        rgba(119, 64, 35, 0.3) 0%,
        rgba(26, 20, 16, 0.7) 100%);
    border-color: var(--aot-tan);
    transform: translateX(4px);
}

.choice.correct {
    background: linear-gradient(135deg, var(--success) 0%, var(--aot-green) 100%);
    color: var(--text-white);
    border-color: var(--success);
    animation: pulse 0.5s;
}

.choice.wrong {
    background: linear-gradient(135deg, var(--danger) 0%, var(--aot-red) 100%);
    color: var(--text-white);
    border-color: var(--danger);
    animation: shake 0.4s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.feedback {
    text-align: center;
    padding: 16px;
    border-radius: 8px;
    font-weight: 600;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    font-size: 14px;
    backdrop-filter: blur(10px);
}

.feedback.success {
    background: rgba(74, 124, 89, 0.25);
    color: #81c995;
    border-color: var(--success);
}

.feedback.error {
    background: rgba(198, 40, 40, 0.25);
    color: #ff6b6b;
    border-color: var(--danger);
}

/* Admin Page */
.add-section {
    background: linear-gradient(135deg, 
        rgba(78, 105, 82, 0.15) 0%,
        rgba(26, 20, 16, 0.8) 100%);
    border: 2px solid var(--aot-brown);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.add-section h3 {
    font-size: 13px;
    margin-bottom: 18px;
    color: var(--aot-cream);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
}

.add-section input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--aot-green);
    border-radius: 8px;
    font-size: 15px;
    margin-bottom: 14px;
    background: rgba(26, 20, 16, 0.5);
    color: var(--aot-cream);
    transition: all 0.3s;
    backdrop-filter: blur(5px);
}

.add-section input::placeholder {
    color: var(--text-gray);
}

.add-section input:focus {
    outline: none;
    border-color: var(--aot-tan);
    background: rgba(26, 20, 16, 0.7);
    box-shadow: 0 0 0 3px rgba(216, 140, 81, 0.1);
}

#add-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--aot-tan) 0%, var(--aot-brown) 100%);
    color: var(--aot-dark);
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 4px 12px rgba(119, 64, 35, 0.4);
}

#add-btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 6px rgba(119, 64, 35, 0.4);
}

.list-section h3 {
    font-size: 13px;
    margin-bottom: 18px;
    color: var(--aot-cream);
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
}

#vocab-count {
    color: var(--aot-tan);
    font-size: 13px;
}

.vocab-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.vocab-item {
    background: linear-gradient(135deg, 
        rgba(78, 105, 82, 0.12) 0%,
        rgba(26, 20, 16, 0.7) 100%);
    border: 2px solid var(--aot-green);
    border-radius: 10px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.vocab-item:active {
    border-color: var(--aot-tan);
    transform: translateX(4px);
}

.vocab-info {
    flex: 1;
}

.vocab-word {
    font-size: 16px;
    font-weight: 700;
    color: var(--aot-cream);
    margin-bottom: 4px;
    letter-spacing: 0.5px;
}

.vocab-trans {
    font-size: 14px;
    color: var(--aot-tan);
}

.delete-btn {
    background: rgba(215, 26, 28, 0.2);
    border: 2px solid transparent;
    color: var(--text-gray);
    font-size: 24px;
    cursor: pointer;
    padding: 6px 10px;
    transition: all 0.3s;
    line-height: 1;
    border-radius: 6px;
}

.delete-btn:active {
    color: var(--aot-red);
    background: rgba(215, 26, 28, 0.3);
    border-color: var(--aot-red);
    transform: rotate(90deg) scale(1.1);
}

.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-gray);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Animations */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }

}




.main-footer {
    margin-top: 30px;
    padding-bottom: 20px;
    text-align: center;
}

.developer-credit {
    /* ใช้ฟอนต์ Cinzel ที่คุณมีในโปรเจกต์ */
    font-family: 'Cinzel', serif; 
    font-size: 0.9rem;
    color: #ffffff;
    opacity: 0.6; /* ทำให้ดูจางลงเล็กน้อยเพื่อความสวยงาม */
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2); /* เพิ่มเงาฟุ้งๆ ให้ดูมีพลัง */
}