/* Mode Selector and Tab Styles */
.mode-selector {
    display: flex;
    background: linear-gradient(135deg, rgba(15, 15, 30, 0.95) 0%, rgba(20, 20, 35, 0.95) 100%);
    padding: 14px;
    gap: 10px;
    border-bottom: 2px solid var(--border);
    flex-wrap: wrap;
    box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.05);
}

.mode-btn {
    flex: 1;
    min-width: 110px;
    padding: 12px 18px;
    background: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 14px;
    font-weight: 600;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.15));
    opacity: 0;
    transition: opacity 0.3s;
}

.mode-btn:hover {
    color: var(--text);
    border-color: var(--glass-border);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.mode-btn:hover::before {
    opacity: 1;
}

.mode-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-color: var(--primary-light);
    box-shadow:
        0 6px 20px var(--primary-glow),
        0 0 30px var(--primary-glow),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Fit Screen Toggle Button */
.fit-screen-toggle {
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.fit-screen-toggle:hover {
    color: var(--text);
    border-color: var(--glass-border);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.fit-screen-toggle.active {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    border-color: var(--success);
    box-shadow: 0 4px 12px var(--success-glow);
}

.fit-icon {
    font-size: 18px;
    line-height: 1;
}

/* Tab Styles */
.graph-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 18px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 2px;
}

.tab-btn {
    padding: 10px 18px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 14px;
    font-weight: 600;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tab-btn:hover {
    color: var(--text);
    background: rgba(79, 70, 229, 0.1);
    border-radius: 8px 8px 0 0;
}

.tab-btn.active {
    color: var(--primary-light);
    border-bottom-color: var(--primary);
    background: rgba(79, 70, 229, 0.15);
    border-radius: 8px 8px 0 0;
}

.tab-btn.active::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--primary));
    box-shadow: 0 0 10px var(--primary-glow);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    margin-left: auto;
    margin-right: 10px;
}

.language-select {
    background: transparent;
    color: var(--text-secondary);
    border: 1.5px solid var(--border);
    border-radius: 10px;
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 14px;
    padding-right: 28px;
}

.language-select:hover {
    color: var(--text);
    border-color: var(--glass-border);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.language-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.language-select option {
    background: var(--dark);
    color: var(--text);
    padding: 8px;
}