/* ==========================================
   LAYOUT, PANELS, USER PROFILE & SETUP MODAL
   ========================================== */

.app-container {
    width: 100%;
    max-width: 720px;
    z-index: 10;
    perspective: 1000px;
}

/* User Greeting Bar */
.user-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 16px;
    margin-bottom: 20px;
    transition: var(--transition-smooth);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-greeting {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.user-greeting strong {
    color: var(--text-bright);
    font-weight: 700;
}

.quiz-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 10px var(--accent-glow);
}

.btn-logout {
    background: none;
    border: none;
    color: var(--error);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.btn-logout:hover {
    opacity: 1;
    text-decoration: underline;
}

/* Glassmorphism Panel Component */
.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--panel-shadow);
    display: none;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.5s ease;
    opacity: 0;
}

.glass-panel.active {
    display: block;
    opacity: 1;
    animation: slideUpIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Button Styles Premium */
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #b5179e 100%);
    color: var(--text-bright);
    border: none;
    border-radius: 14px;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition-smooth);
    box-shadow: 0 8px 25px var(--primary-glow);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(138, 43, 226, 0.6);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    border-radius: 14px;
    padding: 16px 32px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition-smooth);
    width: 100%;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-bright);
}

/* Modal Setup Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 3, 8, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.modal.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    max-width: 480px;
    width: 90%;
    padding: 30px !important;
    text-align: center;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
    opacity: 1 !important;
}

.modal h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #ffffff, #a88beb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.avatar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.avatar-option {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.05);
    transition: var(--transition-smooth);
    padding: 4px;
}

.avatar-option:hover {
    transform: scale(1.1);
    background: rgba(255, 255, 255, 0.1);
}

.avatar-option.selected {
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
    background: rgba(0, 242, 254, 0.1);
}

#quiz-name-input {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-bright);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 24px;
    outline: none;
    text-align: center;
    transition: var(--transition-smooth);
}

#quiz-name-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
    background: rgba(0, 0, 0, 0.3);
}

/* Responsive Utilities */
@media (max-width: 600px) {
    body {
        padding: 12px;
    }

    .glass-panel {
        padding: 24px 20px;
        border-radius: 20px;
    }
}

/* Theme Toggle Button for Quiz */
.quiz-header-bar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.theme-toggle-btn-quiz {
    background: var(--card-bg);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    padding: 7px 14px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
    user-select: none;
}

.theme-toggle-btn-quiz:hover {
    border-color: var(--accent);
    color: var(--text-bright);
    transform: translateY(-1px);
}

[data-theme="light"] .theme-toggle-btn-quiz {
    background: #ffffff;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

[data-theme="light"] #quiz-name-input {
    background: #ffffff;
    border-color: var(--panel-border);
    color: var(--text-bright);
}

[data-theme="light"] .segmented-control {
    background: #e2e8f0;
}